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Final Study FlashCards
Finals - 8th Grade - Science
82
Science
8th Grade
05/06/2013

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Cards

Term
What term describes the difference in elevation between the highest and lowest parts of an area?
Definition
Relief
Term
The science that studies the constructive and destructive forces that build up or wear away Earth's surface is?
Definition
Geology
Term
The point on Earth's surface having zero degrees latitude and zero degrees longitude would be located?
Definition
Where the equator crosses the Prime Meridian
Term
To find the latitude, longitude, and elevation of points on Earth's surface, the Global Positioning System uses?
Definition
A network of sattelites
Term
A satellite image is made up of thousands of tiny dots called?
Definition
Pixels
Term
The rate of chemical weathering is faster in hot, wet climates than in cold, dry climates. True or False?
Definition
True
Term
The movement of rock particles by ice, wind, water, or gravity is called weathering. True or False?
Definition
False, Erosion.
Term
The mixture of rock particles, minerals, decayed organic material, air and water is called?
Definition
Soil
Term
What can cause the loss of soil that is not protected by plant cover?
Definition
Erosion by water or wind.
Term
During an earthquake, seismic waves move outward from the focus in all directions. True or False?
Definition
True.
Term
The type of seismic waves that arrive at the surface first and move by compressing and expanding the ground like an accordion are called?
Definition
P Waves
Term
Most earthquake-related deaths and injuries result from
Definition
Damage to buildings or other structures.
Term
A building designed to reduce the amount of energy that reaches the building during an earthquake is called a?
Definition
Base-Isolated Building
Term
The best way to protect yourself in an earthquake is to?
Definition
Drop, Cover and hold.
Term
Which type of fault-monitoring device is most like a carpenter's level?
Definition
Tiltmeter
Term
Geologists know that wherever plate movement stores energy in the rock along faults,
Definition
Earthquakes are likely.
Term
The process in which the violent shaking of an earthquake turns soft soil into liquid mud is called?
Definition
Liquidfaction
Term
Earth's rotation takes about?
Definition
24 hours.
Term
One complete revolution of Earth around the sun takes about
Definition
One Year
Term
Because the moon rotates once for each revolution around Earth,
Definition
You never see the far side of the moon.
Term
For a solar eclipse to occur?
Definition
The moon must be directly between Earth and the sun.
Term
During what phase can a lunar eclipse occur?
Definition
Full Moon
Term
Tides are caused mainly by?
Definition
Differences in how much the moon pulls on different parts of Earth.
Term
Most places on Earth experience?
Definition
One high tide and one low tide about every 12.5 hours.
Term
If subduction occurs faster than oceanic crust can be created an ocean will expand. True or False?
Definition
False, Shrink.
Term
As depth beneath Earth's surface increases, temperature and pressure
Definition
Both increase.
Term
How do geologists observe Earth's interior?
Definition
By recording and studying seismic waves
Term
Earth's inner core is
Definition
A dense ball of solid metal
Term
When the heat source is removed from a fluid, convection currents in the fluid will
Definition
Eventually stop
Term
A place where two plates slip past each other, moving in opposite directions, is known as a
Definition
Transform Boundary
Term
When continental plates pull apart at a divergent boundary on land an ________
forms
Definition
Rift Valley
Term
Each major group of rocks follows only one pathway in the rock cycle. True or False
Definition
False, Many pathways.
Term
Generally, a rock is made up of
Definition
A mixture of minerals and other materials.
Term
To describe a rock's texture, geologists determine?
Definition
The size, shape, and pattern of the rock's grains.
Term
Where does most metamorphic rock form?
Definition
Deep Underground
Term
Igneous rock that formed from lava that erupted onto Earth's surface is called?
Definition
Extrusive Rock
Term
The skeletons of tiny ocean animals from together to form ________ structures that are found only in warm, clear ocean waters.
Definition
Coral Reefs.
Term
A person who is caught in a flood while inside a car should leave the car. True or False
Definition
True.
Term
Rain or snow usually is associated with falling air Pressure. True or False
Definition
True
Term
One difference between cyclones and anticyclones is
Definition
The direction of their winds
Term
Thunderstorms Form Within
Definition
Large Cumulonimbus clouds
Term
One of the best places to seek protection during a tornado is
Definition
In the basement of a well-built building
Term
Flooding is most often caused by
Definition
Melting snow and spring rains
Term
People who study weather and try to predict it are called
Definition
Meteorologists
Term
During a thunderstorm, a person should not touch objects that are made of
Definition
Metal
Term
On the Celsius scale, the freezing point of pure water is 0Degrees True or False
Definition
True
Term
Fluids like air tend to move towards areas of high pressure True or False
Definition
False, Low.
Term
Earth's major wind belts are the trade winds, the prevailing westerlies and the polar latitudes. True or False
Definition
False, Polar Easterlies
Term
Most of the Energy that heats Earth's atmosphere is
Definition
Infrared Radiation
Term
Heat from a campfire reaches you by
Definition
Radiation
Term
Very high feathery clouds are called
Definition
Cirrus Clouds
Term
Any form of water that falls from clouds is called
Definition
Precipitation
Term
The difference between sleet and hail is
Definition
The size of the ice pellets.
Term
Generally, only the soft parts of organisms become fossils. True or false?
Definition
False, Hard.
Term
Which type of fossil can provide clues about the activities or ancient organisms?
Definition
Trace Fossils
Term
The relative age of a rock is
Definition
Its age compared to the age of other rocks.
Term
How did Earth change about 2.5 billion years ago when some organisms began using photosynthesis to make food?
Definition
The amount of oxygen in the atmosphere increased.
Term
Paleontologists are scientists who study
Definition
Fossils.
Term
During the Quaternary Period, a series of _______ occured when Earth's climate cooled.
Definition
Ice Ages
Term
A mineral with a hardness of 6 will scratch a mineral with a hardness of more than 6. True or False?
Definition
False. Less.
Term
The mineral quartz, which is found in sand, is used to make glass and electronic equipment. True or False?
Definition
True
Term
The faster magma cools, the smaller the mineral crystals form. True or False
Definition
True
Term
A mineral must be formed by a manufactured process to be considered a mineral. True or False.
Definition
False, Natural.
Term
Coal is not classified as a mineral becuase
Definition
It comes from the remains of plants and animals.
Term
What is the hardest known mineral?
Definition
Diamond
Term
Which term refers to anyone who searches for an ore deposit
Definition
Prospecter.
Term
A mineral is always a ______ because it has a definite volume and shape.
Definition
Solid.
Term
Volcanoes on Triton, a moon of Neptune, erupt fountains of liquid lava. True or False?
Definition
False, Nitrogen
Term
Before lava reaches the surface it is called?
Definition
Magma
Term
The formation of the Hawaiian Islands is one example of
Definition
Volcanoes forming over a hot spot
Term
Magma flows upward through cracks in rock because it is
Definition
Less dense than the surrounding solid metal
Term
If geologists detect many small earthquakes in the area near a volcano, what can they infer about the volcano?
Definition
It is probably about to erupt.
Term
A mass of rock formed when a large body of magma cools inside the crust is called a?
Definition
Batholith
Term
Because Mercury, Venus, and Mars are smaller than Earth and their cores have cooled, scientists think that
Definition
The volcanic activity on these planets has ended
Term
A light-year is
Definition
The distance light travels in a year
Term
A star is born when
Definition
Nuclear fusion starts.
Term
All stars begin their lives as parts of
Definition
Nebulas
Term
The force that tends to pull together the matter in stars is
Definition
Gravity
Term
The lifetime of a star depends on its
Definition
Mass
Term
Depending on its mass, a star may live from
Definition
10 million to 200 billion years.
Term
The Milky Way Galaxy is
Definition
A spiral galaxy
Term
All stars begin as part of a large amount of gas and dust called an ______
Definition
Nebula
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