Term
How are babies of reptiles different from babies of mammals?
A
|
Reptiles develop in eggs.
|
B
|
Reptiles develop in the womb.
|
C
|
Reptile babies breathe with gills.
|
D
|
Reptile babies need to be fed by their parents.
|
|
|
Definition
Reptiles develop in eggs. |
|
|
Term
How are fungi different from plants?
F
|
Fungi absorb sugar to make food.
|
G
|
Fungi do not make their own food.
|
H
|
Fungi need dead wood to make food.
|
I
|
Fungi do not need sunlight to make food.
|
|
|
Definition
Fungi do not make their own food |
|
|
Term
How are amphibians different from all other classes of vertebrates?
A
|
Amphibians hatch from eggs.
|
B
|
Amphibians are cold-blooded.
|
C
|
Adult amphibians look nothing like baby amphibians.
|
D
|
Adult amphibians have bodies unlike any other vertebrate.
|
|
|
Definition
Adult amphibians look nothing like baby amphibians. |
|
|
Term
Which two characteristics do most mammals share?
F
|
They are cold-blooded and mothers make milk for their young.
|
G
|
They are warm-blooded and mothers make milk for their young.
|
H
|
They are cold-blooded and have hair or fur covering their bodies.
|
I
|
They are warm-blooded and have feathers or scales covering their bodies.
|
|
|
Definition
They are warm-blooded and mothers make milk for their young. |
|
|
Term
5 Which choice below shows the order of organization in an animal from simplest to most complex?
A
|
organ system, organ, tissue, cell
|
B
|
cell, tissue, organ, organ system
|
C
|
tissue, cell, organ system, organ
|
D
|
cell, organ, tissue, organ system
|
|
|
Definition
B
|
cell, tissue, organ, organ system
|
|
|
|
Term
6 Which two organ systems work together to move the body?
F
|
muscle system and bone system
|
G
|
muscle system and digestive system
|
H
|
nervous system and digestive system
|
I
|
respiratory system and nervous system
|
|
|
Definition
F
|
muscle system and bone system
|
|
|
|
Term
What is the name of a group of similar cells working together to perform the same function?
A
|
tissue
|
B
|
organ
|
C
|
system
|
D
|
bundle
|
|
|
Definition
|
|
Term
Which type of blood vessel takes blood from cells back to the heart?
F
|
vein
|
G
|
artery
|
H
|
arteriole
|
I
|
capillary
|
|
|
Definition
|
|
Term
9 How does food move through the esophagus?
A
|
Air presses food through the esophagus.
|
B
|
Gravity forces food to move down the esophagus.
|
C
|
Rings of muscles squeeze food down the esophagus.
|
D
|
Food smoothly slides down the mucus-lined esophagus.
|
|
|
Definition
C
|
Rings of muscles squeeze food down the esophagus.
|
|
|
|
Term
The transportation system of the body is the
F
|
urinary system.
|
G
|
digestive system.
|
H
|
circulatory system.
|
I
|
respiratory system.
|
|
|
Definition
|
|
Term
Which of the following will the body make an increased number of in response to an infection?
A
|
plasma
|
B
|
platelets
|
C
|
red blood cells
|
D
|
white blood cells
|
|
|
Definition
|
|
Term
Leaves have many tiny openings on the bottom. What is the purpose of these openings?
F
|
They allow only oxygen to pass into a plant.
|
G
|
They allow air to pass into and out of a plant.
|
H
|
They allow water to pass into and out of a plant.
|
I
|
They allow only carbon dioxide to pass out of a plant.
|
|
|
Definition
G
|
They allow air to pass into and out of a plant.
|
|
|
|
Term
Look at the following diagram about photosynthesis. Which product is missing?
carbon dioxide + water + energy = oxygen + ______
A
|
salt
|
B
|
sugar
|
C
|
potassium
|
D
|
chlorophyll
|
|
|
Definition
|
|
Term
Most water enters a plant through which of the following structures?
F
|
taproots
|
G
|
root hairs
|
H
|
root bundles
|
I
|
fibrous roots
|
|
|
Definition
|
|
Term
[image]Look at the diagram below. Which letter identifies where pollen is made in a flower?
|
|
Definition
|
|
Term
The oceans cover about what percentage of Earth?
A
|
25 percent
|
B
|
50 percent
|
C
|
75 percent
|
D
|
90 percent
|
|
|
Definition
|
|
Term
Which of the following is the source of most of the oxygen in the atmosphere?
F
|
plants
|
G
|
volcanoes
|
H
|
trucks and cars
|
I
|
plankton in the oceans
|
|
|
Definition
|
|
Term
Corals have a symbiotic relationship with plant-like algae that grow inside them. How do the algae benefit the corals?
A
|
The algae provide the corals with various nutrients.
|
B
|
The algae help the corals make a hard outside coating.
|
C
|
The algae allow the corals to live in deep ocean environments.
|
D
|
The algae release a toxin that keeps predators away from the corals.
|
|
|
Definition
B
|
The algae help the corals make a hard outside coating.
|
|
|
|
Term
A plant in the desert would most likely have which root system?
F
|
a small taproot with long root hairs
|
G
|
a small taproot with short root hairs
|
H
|
a large root system, close to the surface
|
I
|
a large root system, deep beneath the surface
|
|
|
Definition
H
|
a large root system, close to the surface
|
|
|
|
Term
Creatures that live in the deep ocean need to adapt to which environmental factor?
A
|
lack of food
|
B
|
high pressure
|
C
|
low levels of salt
|
D
|
high temperatures
|
|
|
Definition
|
|
Term
Look at the energy pyramid below. Where is the greatest amount of energy?
|
|
Definition
|
|
Term
How do carnivores obtain energy?
A
|
They eat plants.
|
B
|
They eat animals.
|
C
|
They eat animals and plants.
|
D
|
They eat the food they make.
|
|
|
Definition
|
|
Term
What role do decomposers play in ecosystems?
F
|
They break down nitrogen and oxygen.
|
G
|
They break down waste and dead matter.
|
H
|
They provide nutrients for carnivores to make energy.
|
I
|
They provide nutrients for omnivores to make energy.
|
|
|
Definition
G
|
They break down waste and dead matter.
|
|
|
|
Term
What carries warm water toward the poles?
F
|
tides
|
G
|
rivers
|
H
|
waves
|
I
|
currents
|
|
|
Definition
|
|
Term
Which best describes rivers, streams, and lakes?
A
|
surface salt water
|
B
|
salty groundwater
|
C
|
fresh groundwater
|
D
|
surface fresh water
|
|
|
Definition
|
|
Term
How does an iceberg form?
F
|
An iceberg forms when ocean water freezes.
|
G
|
An iceberg forms when an ice sheet cracks at its base.
|
H
|
An iceberg forms when water from a glacier flows into an ocean and freezes.
|
I
|
An iceberg forms when a large piece of ice breaks off a glacier or ice sheet.
|
|
|
Definition
I
|
An iceberg forms when a large piece of ice breaks off a glacier or ice sheet.
|
|
|
|
Term
Water that fills spaces between particles of rock and soil is
A
|
rainwater.
|
B
|
salt water.
|
C
|
groundwater.
|
D
|
reservoir water.
|
|
|
Definition
|
|
Term
What is the top level of groundwater in an aquifer called?
F
|
water top
|
G
|
water base
|
H
|
water level
|
I
|
water table
|
|
|
Definition
|
|
Term
Look at the picture of the water cycle.
Which arrow shows condensation?
|
|
Definition
|
|
Term
Dew forms during which part of the water cycle?
F
|
runoff
|
G
|
evaporation
|
H
|
precipitation
|
I
|
condensation
|
|
|
Definition
|
|
Term
Sometimes, water vapor on a surface may freeze without first becoming liquid water. What forms when this occurs?
A
|
hail
|
B
|
dew
|
C
|
frost
|
D
|
snow
|
|
|
Definition
|
|
Term
Which of the following is true about clouds in the summer sky?
F
|
Many of them are made of ice crystals.
|
G
|
They form at high altitude under great pressure.
|
H
|
Many of them form at low altitude under low pressure.
|
I
|
They are white because little sunlight gets through them.
|
|
|
Definition
F
|
Many of them are made of ice crystals.
|
|
|
|
Term
Frozen raindrops falling from clouds are called
A
|
hail.
|
B
|
sleet.
|
C
|
snow.
|
D
|
freezing rain.
|
|
|
Definition
|
|
Term
When air moves upward to areas of less air pressure, what often forms?
F
|
fog
|
G
|
dew
|
H
|
clouds
|
I
|
water vapor
|
|
|
Definition
|
|
Term
Convection currents form when air temperatures are
A
|
different.
|
B
|
the same.
|
C
|
less than 0°C.
|
D
|
greater than 100°C.
|
|
|
Definition
|
|
Term
A column of wind lifted up on one end by upward winds and pressed down on the other end by downward winds describes which of the following?
F
|
tornado
|
G
|
blizzard
|
H
|
hurricane
|
I
|
thunderstorm
|
|
|
Definition
|
|
Term
Hurricanes get their energy from
A
|
cool ocean waters.
|
B
|
warm ocean waters.
|
C
|
increasing land temperatures.
|
D
|
decreasing land temperatures.
|
|
|
Definition
|
|
Term
Which weather instrument is used to measure wind speed?
F
|
radar
|
G
|
rain gauge
|
H
|
hygrometer
|
I
|
anemometer
|
|
|
Definition
|
|
Term
A scientist studying climates finds a fossil of a fish in the desert. What can the scientist learn from this fossil?
A
|
that the desert has always had a dry climate
|
B
|
that there was an error in the scientist's work
|
C
|
that there is an underground lake in the desert
|
D
|
that the desert probably had a wet climate at one time
|
|
|
Definition
D
|
that the desert probably had a wet climate at one time
|
|
|
|
Term
How do scientists learn about the mantle and core of Earth?
F
|
They bore holes into Earth to study the layers.
|
G
|
They cut cross-sections of layers using a specially made drill.
|
H
|
They study material that pushed through cracks in the crust.
|
I
|
They use information about Earth's moon to learn about Earth.
|
|
|
Definition
H
|
They study material that pushed through cracks in the crust.
|
|
|
|
Term
What makes up Earth's lithosphere?
A
|
Earth's crust and core
|
B
|
the mantle and the outer core
|
C
|
the bottom part of the mantle and the core
|
D
|
the top part of the Earth's mantle and the crust above it
|
|
|
Definition
D
|
the top part of the Earth's mantle and the crust above it
|
|
|
|
Term
What force makes two plates jerk into a new position?
F
|
volcano
|
G
|
tsunami
|
H
|
hurricane
|
I
|
earthquake
|
|
|
Definition
|
|
Term
Which of the following is a constructive force of nature?
A
|
volcano
|
B
|
tsunami
|
C
|
hurricane
|
D
|
earthquake
|
|
|
Definition
|
|
Term
Several different types of stone were exposed to the weather for many years. Which type of stone will most likely show the greatest amount of weathering?
F
|
basalt
|
G
|
marble
|
H
|
granite
|
I
|
limestone
|
|
|
Definition
|
|
Term
How do farmers work to prevent wind erosion of topsoil?
A
|
They frequently plow their fields.
|
B
|
They plant crops that grow close to the ground.
|
C
|
They plant crops in valleys rather than on hills.
|
D
|
They surround fields with natural barriers, such as trees.
|
|
|
Definition
D
|
They surround fields with natural barriers, such as trees.
|
|
|
|
Term
The placing of materials in a new place is called
F
|
erosion.
|
G
|
deposition.
|
H
|
physical weathering.
|
I
|
chemical weathering.
|
|
|
Definition
|
|
Term
Which property below can you use to identify an unknown mineral?
A
|
its mass
|
B
|
its weight
|
C
|
its volume
|
D
|
its hardness
|
|
|
Definition
|
|
Term
How can you identify igneous rock?
F
|
It has visible crystals.
|
G
|
It has thin layers of rock.
|
H
|
It is smooth with a black surface.
|
I
|
It has thin, curved layers of rock.
|
|
|
Definition
F
|
It has visible crystals.
|
|
|
|
Term
Which of the following is a nonrenewable resource?
A
|
clean air
|
B
|
fossil fuel
|
C
|
fresh water
|
D
|
solar energy
|
|
|
Definition
|
|
Term
Choose the word that belongs in the sentence.
Wind, Water, and the Sun are ____ energy sources.
F
|
renewable
|
G
|
recyclable
|
H
|
nonrecyclable
|
I
|
nonrenewable
|
|
|
Definition
|
|
Term
How do hydroelectric power plants produce energy?
A
|
Fossil fuels burn.
|
B
|
Wind spins the blades.
|
C
|
Solar cells collect solar rays.
|
D
|
Water flows through a dam.
|
|
|
Definition
D
|
Water flows through a dam.
|
|
|
|
Term
What is one advantage of geothermal energy over wind energy?
F
|
Geothermal energy is a renewable resource.
|
G
|
Geothermal energy can always produce electricity.
|
H
|
Geothermal energy does not pollute the environment.
|
I
|
Geothermal energy plants can be built in only a few places.
|
|
|
Definition
G
|
Geothermal energy can always produce electricity.
|
|
|
|
Term
How can rain harm the environment?
A
|
Air pollution gets into rain as it falls.
|
B
|
Polluted water forms clouds and then it rains.
|
C
|
Air pollution is absorbed into clouds and forms polluted rain.
|
D
|
Polluted water evaporates into the water cycle and then comes down as polluted rain.
|
|
|
Definition
A
|
Air pollution gets into rain as it falls.
|
|
|
|
Term
The Earth has a lot of aluminum. But aluminum is still recycled. What is an advantage of recycling aluminum?
F
|
Recycled aluminum has higher quality.
|
G
|
Recycling aluminum creates more jobs.
|
H
|
It takes less energy to recycle than to mine more aluminum.
|
I
|
It conserves fewer resources to recycle than to mine more aluminum.
|
|
|
Definition
H
|
It takes less energy to recycle than to mine more aluminum.
|
|
|
|
Term
What natural resource does nuclear energy require?
A
|
copper
|
B
|
uranium
|
C
|
aluminum
|
D
|
magnesium
|
|
|
Definition
|
|
Term
Most elements are metals. Which of the following is a physical property of metals?
F
|
shiny
|
G
|
bendable
|
H
|
conducts heat
|
I
|
all of the above
|
|
|
Definition
|
|
Term
An object that takes up more space than another object has a greater ____.
A
|
mass
|
B
|
density
|
C
|
volume
|
D
|
weight
|
|
|
Definition
|
|
Term
How many different elements are in a molecule of CO2?
|
|
Definition
|
|
Term
Why do most materials get smaller when they cool?
A
|
Some particles are destroyed.
|
B
|
The particles have less space between them.
|
C
|
Some particles turn into a different material.
|
D
|
The particles have more space between them.
|
|
|
Definition
B
|
The particles have less space between them.
|
|
|
|
Term
Look at the illustration below.
What causes the phase change of water shown in the illustration below?
F
|
cooling
|
G
|
heating
|
H
|
melting
|
I
|
condensation
|
|
|
Definition
|
|
Term
When does dew form?
A
|
When a gas is cooled.
|
B
|
When a gas is heated.
|
C
|
When a liquid is cooled.
|
D
|
When a liquid is heated.
|
|
|
Definition
|
|
Term
Materials in simple mixtures ____.
F
|
cannot be separated
|
G
|
can be separated easily
|
H
|
can be separated only by using cold
|
I
|
can be separated only by using heat
|
|
|
Definition
G
|
can be separated easily
|
|
|
|
Term
In a solution, the substance that dissolves is the ____.
A
|
solid
|
B
|
saline
|
C
|
solute
|
D
|
solvent
|
|
|
Definition
|
|
Term
Which change below is a chemical change?
F
|
One kind of matter changes phases.
|
G
|
One kind of matter changes its shape and volume.
|
H
|
One kind of matter keeps its identity and properties.
|
I
|
One kind of matter changes into another kind of matter.
|
|
|
Definition
I
|
One kind of matter changes into another kind of matter.
|
|
|
|
Term
Which of the following describes what happens during a chemical reaction?
A
|
Matter is destroyed.
|
B
|
Matter is not changed.
|
C
|
Matter is created and destroyed.
|
D
|
Matter is neither created nor destroyed.
|
|
|
Definition
D
|
Matter is neither created nor destroyed.
|
|
|
|
Term
A tent is from a polymer developed in a chemical laboratory. What is the name of the polymer?
F
|
silk
|
G
|
wool
|
H
|
nylon
|
I
|
cotton
|
|
|
Definition
|
|
Term
Which object has a steady, or constant, motion?
A
|
a car
|
B
|
the Earth
|
C
|
a sea star
|
D
|
a pendulum
|
|
|
Definition
|
|
Term
How do electricity and magnetism act on different objects?
F
|
They can only pull objects.
|
G
|
They can only push objects.
|
H
|
They can either push or pull objects.
|
I
|
They can either push or pull objects only if they touch.
|
|
|
Definition
H
|
They can either push or pull objects
|
|
|
|
Term
Machine A performs 48 joules of work in 4 seconds. Machine B performs the same amount of work in half the time. Which statement is true about Machines A and B?
A
|
Machine A and Machine B used no power.
|
B
|
Machine A used more power than Machine B.
|
C
|
Machine B used more power than Machine A.
|
D
|
Machine A and Machine B used the same amount of power.
|
|
|
Definition
C
|
Machine B used more power than Machine A.
|
|
|
|
Term
When you ride a roller coaster, what makes your body rise out of its seat at the top of a hill?
F
|
inertia
|
G
|
gravity
|
H
|
friction
|
I
|
electricity
|
|
|
Definition
|
|
Term
How can you complete this sentence so it is always true?
The greater the net force acting on an object, ____.
A
|
the less the mass of the object
|
B
|
the greater the mass of the object
|
C
|
the less the acceleration of the object
|
D
|
the greater the acceleration of the object
|
|
|
Definition
D
|
the greater the acceleration of the object
|
|
|
|
Term
Which complex machine uses mainly human force to operate the simple machines in it?
F
|
car
|
G
|
ship
|
H
|
bicycle
|
I
|
go cart
|
|
|
Definition
|
|
Term
A student rolls these four items on the same surface and at the same speed. Which item will have the greatest kinetic energy?
A
|
marble
|
B
|
basketball
|
C
|
beach ball
|
D
|
table tennis ball
|
|
|
Definition
|
|
Term
What type of energy is released when a proton is knocked out of an atom's nucleus?
F
|
atomic energy
|
G
|
nuclear energy
|
H
|
chemical energy
|
I
|
potential energy
|
|
|
Definition
|
|
Term
Choose the words that belong in the sentence.
A sound with greater ____ has a ____ pitch.
A
|
frequency, lower
|
B
|
amplitude, lower
|
C
|
frequency, higher
|
D
|
amplitude, higher
|
|
|
Definition
|
|
Term
Sound travels most slowly through which choice below?
F
|
a metal pole
|
G
|
a wood block
|
H
|
a pool of water
|
I
|
an area of cool air
|
|
|
Definition
|
|
Term
In which substance do the particles move the fastest?
A
|
ice cube
|
B
|
apple juice
|
C
|
ocean water
|
D
|
hot chocolate
|
|
|
Definition
|
|
Term
How do currents transfer heat in the ocean?
F
|
by radiation
|
G
|
by convection
|
H
|
by conduction
|
I
|
by evaporation
|
|
|
Definition
|
|
Term
When an atom loses electrons, its charge becomes
A
|
neutral.
|
B
|
positive.
|
C
|
negative.
|
D
|
positive or negative.
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|
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Definition
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Term
Which of the following is an example of a conductor? F glass G rubber H plastic I salt water |
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Definition
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Term
How is an insulator used in a circuit?
A
|
An insulator helps keep the electric charges inside the pathway.
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B
|
An insulator transforms electrical energy to other forms of energy.
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C
|
An insulator provides the pathway electric current moves through.
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D
|
An insulator provides the energy to pump electric charges through the circuit.
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|
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Definition
A
|
An insulator helps keep the electric charges inside the pathway.
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Term
Look at the illustration below.
How many resistors does this circuit diagram show?
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Definition
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Term
Choose the word that belongs in the sentence.
A circuit with more than one resistor on a wire is a ____ circuit.
A
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series
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B
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simple
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C
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multiple
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D
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complex
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|
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Definition
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Term
How is a parallel circuit different from a series circuit?
F
|
series circuit has more than one pathway.
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G
|
parallel circuit has more than one pathway.
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H
|
series circuit provides more electrical energy.
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I
|
parallel circuit provides more electrical energy.
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|
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Definition
G
|
parallel circuit has more than one pathway.
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Term
What makes a material a superconductor?
A
|
It has no resistance to electrical current.
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B
|
It has a high resistance to electrical current.
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C
|
It conducts electricity at super high pressures.
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D
|
It conducts electricity at super high temperatures.
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|
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Definition
A
|
It has no resistance to electrical current.
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Term
Why does a balloon rubbed on a sweater stick to a wall?
F
|
The balloon's charge repels the charge of the wall.
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G
|
The balloon's charge attracts the charge of the wall.
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H
|
The balloon's charge is equal to the charge of the wall.
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I
|
The balloon's charge is greater than the charge of the wall.
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|
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Definition
G
|
The balloon's charge attracts the charge of the wall.
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Term
How did people long ago develop calendars?
A
|
They studied predictable cycles of the sky.
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B
|
They predicted when eclipses would next occur.
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C
|
They watched for unexpected patterns in the sky.
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D
|
They counted days between appearances of new objects in the sky.
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|
|
Definition
A
|
They studied predictable cycles of the sky.
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Term
Why do telescopes in space get a more complete picture of space objects?
F
|
They are closer to the objects.
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G
|
They are beyond Earth's atmosphere.
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H
|
It is always lighter in space than it is on Earth.
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I
|
Telescopes in space are bigger than those on Earth.
|
|
|
Definition
G
|
They are beyond Earth's atmosphere.
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|
|
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Term
New stars form in a cloud of gas and dust called a
A
|
nebula.
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B
|
supernova.
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C
|
black hole.
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D
|
white dwarf.
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|
|
Definition
|
|
Term
What type of galaxy has a shape somewhat like a football?
F
|
spiral galaxy
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G
|
dwarf galaxy
|
H
|
elliptical galaxy
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I
|
irregular galaxy
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|
|
Definition
|
|
Term
|
Definition
B
|
As the Earth moves around the Sun, different parts of the sky come into view.
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|
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Term
What do Jupiter, Saturn, Uranus, and Neptune have in common?
F
|
They all have rocky surfaces.
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G
|
They all have gaseous surfaces.
|
H
|
They all appear to be similar to Earth.
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I
|
They all appear to be made of rock and ice.
|
|
|
Definition
G
|
They all have gaseous surfaces.
|
|
|
|
Term
What causes the temperatures at the North and South Poles to remain so cold throughout the year?
A
|
the tilt of the Earth on its axis
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B
|
the distance between the Earth and the Sun
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C
|
the speed at which the Earth moves around the Sun
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D
|
the length of time it takes for the Earth to turn on its axis
|
|
|
Definition
A
|
the tilt of the Earth on its axis
|
|
|
|
Term
Which choice below gives the correct order of planets from the Sun?
F
|
Mars, Venus, Earth, Saturn
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G
|
Earth, Mars, Venus, Jupiter
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H
|
Mercury, Earth, Mars, Jupiter
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I
|
Uranus, Jupiter, Neptune, Saturn
|
|
|
Definition
H
|
Mercury, Earth, Mars, Jupiter
|
|
|
|
Term
What season is the location on Earth tilted toward the sun experiencing?
A
|
spring
|
B
|
winter
|
C
|
autumn
|
D
|
summer
|
|
|
Definition
|
|
Term
A student says that she saw a shooting star in the sky last night. What did she really see?
F
|
a star
|
G
|
a meteor
|
H
|
an asteroid
|
I
|
a meteoroid
|
|
|
Definition
|
|
Term
Why do craters last for millions of years on the surface of the Moon?
A
|
The wind on the Moon is high in the atmosphere.
|
B
|
The Moon has no water or wind to erode the craters.
|
C
|
The Moon's surface is so hard the craters do not change.
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D
|
The Moon's surface is made of materials that are resistant to change.
|
|
|
Definition
B
|
The Moon has no water or wind to erode the craters.
|
|
|
|
Term
During which phase of the Moon is the Moon passing between Earth and the Sun?
F
|
full moon
|
G
|
new moon
|
H
|
first quarter
|
I
|
crescent moon
|
|
|
Definition
|
|
Term
Why is the tidal difference much less during neap tides?
A
|
Only the Sun pulls on Earth at a straight angle.
|
B
|
Only the Moon pulls on Earth at a straight angle.
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C
|
The Sun and Moon pull on Earth at the same angle.
|
D
|
The Sun pulls on Earth at a greatly different angle from the Moon.
|
|
|
Definition
D
|
The Sun pulls on Earth at a greatly different angle from the Moon
|
|
|
|
Term
Which part of the comet exists both when the comet is close to the Sun and when the comet is far away from the Sun?
F
|
coma
|
G
|
ion tail
|
H
|
nucleus
|
I
|
dust tail
|
|
|
Definition
|
|