Term
| What is the R.A.C.E method? |
|
Definition
restate th problem
analyze
Cite data
Expand/errors |
|
|
Term
| How do you calculate density |
|
Definition
|
|
Term
| How are acceleration and velocity related? |
|
Definition
Velocity is the rate of change position. Both speed and direction are required.
Acceleration is the rate of change isnvelocity |
|
|
Term
| What are newtons three laws of motion? give examples |
|
Definition
first- an object at rest will remain at rest unless acted on by an unbalanced force.
soccer ball doesnt move unless its kicked
second-objects Acceleration depedes on the mass of the object. The greater the mass, the greater the amount of force needed.
throwing a baseball compared to a bowling ball
third- For every action there is an equal and opposite re-action
rocketship pushes on the ground and the ground pushes the rocket upward |
|
|
Term
| Explain terminal velocity |
|
Definition
| steady speed achieved by an object freely falling through a gas or liquid |
|
|
Term
|
Definition
| vector additon is used when motion involves more than one velocity. |
|
|
Term
| How is work output of a machine related to work input of a machine? |
|
Definition
| The output work is less than the input work because of friction |
|
|
Term
| What two conditions need to be met in order for work to be done? |
|
Definition
| Work is done when a force acts on an objectt in the direction the object move. (force and distance) |
|
|
Term
| Explain the kinetic and potential energy of a car rolling down a hil. |
|
Definition
| The car has potential energy at the top of the hill. As the ball rolls down the hill, it gains kinetic energy and loses the potential energy |
|
|
Term
| What is the difference between a chemical and physical change? |
|
Definition
| A chemical can not be changed back and a physical can be. |
|
|
Term
| What are common indications of a chemical change? |
|
Definition
| change in color, the productuon of a gas and the formation of a precipitate |
|
|
Term
| Describe the structure of an atom. |
|
Definition
| three main particles, -electrons, nuetrons, protons |
|
|
Term
| How are atomic number and atomic mass related? |
|
Definition
the atomic mass is the total mass of proton and nuetrons in a nucleus
the atomic number is the number of protons |
|
|
Term
| What characteristics do most metals have in common? |
|
Definition
| good conductors of electric current and heat, most are malleable, solid at room temperature and most are ductile (the can be drawn out into a wire) |
|
|
Term
| How are heterogeneous mixtures different from homogeneos mixtures? |
|
Definition
heterogenous- the parts of the mixture are noticeably different from one another. (parts are different)
homogeneous- difficult to distinguish one substance in the mixture from another. (appears the same throughout) |
|
|
Term
| What are the common changes in phase of matter? Which of those changes is exothermic. |
|
Definition
freezing, melting, sublimation, depositon, vaporization, condensation.
melting |
|
|
Term
| What particle of an atomic is involved in chemical reactions? |
|
Definition
|
|
Term
| What is the difference between ionic and convalent bonds? |
|
Definition
A covalent bond is formed between two non-metals
An ionic bond is formed between a metal and a non-metal. |
|
|
Term
| How are earthquakes measured? |
|
Definition
|
|
Term
| What is erosion? What factors lead to it? |
|
Definition
| the process by which the surface of the earth is worn away by the action of water, glaciers, winds, waves, etc. |
|
|
Term
| describe how the three types of rock form. |
|
Definition
igenous rock- forms from magma
sedimentary rock- forms over time as sediment is squeezed and cemented together
metamorphic-forms from change in temperatur, pressure, or reactions wih hot water. |
|
|
Term
| describe the three type of plate boundaries |
|
Definition
divergent- move away from each other
convergent-plates come together/collide
transform- slide past ech other, moving in opposite directions |
|
|
Term
| describe the layers of the earth |
|
Definition
| the crust, mantle, the core |
|
|
Term
| what are renewable and nonrenewable resources? |
|
Definition
renewable-can be replaced
nonrenewable-not replaces once used. *will run out |
|
|
Term
|
Definition
| the energy an object has when it is moving. |
|
|
Term
|
Definition
| the energy an object has when it is stationary (not moving). |
|
|
Term
|
Definition
| the energy of motion that does the work. |
|
|
Term
|
Definition
| the heat energy the object has (hot or cold at room temperature). |
|
|
Term
| what is work? work input? work output? |
|
Definition
Work is done by transferring energy from one form to another.
input-the work done by the input force acting through the input distance
output- the output force multiplied by th output distance |
|
|
Term
|
Definition
A ridge of high land dividing two areas that are drained by different
river systems. |
|
|
Term
|
Definition
| are substances that cannot be broken down into simplier substances |
|
|
Term
|
Definition
a substance made by combining two or more different materials in
such a way that no chemical reaction occurs |
|
|
Term
|
Definition
| occurs when a substance reacts and forms one or more new substances |
|
|
Term
|
Definition
| occurs when some of the properties of a material change, but the substances in the material remain the same. |
|
|
Term
|
Definition
| releases energy to its surrounding |
|
|
Term
|
Definition
| absorbs energ from its surroundings |
|
|
Term
|
Definition
| positively charged particle |
|
|
Term
|
Definition
| negatively charged particle |
|
|
Term
|
Definition
|
|
Term
|
Definition
| elements equal the number of protons |
|
|
Term
|
Definition
| sum of the protons and nuetrons |
|
|
Term
|
Definition
| arrangement of elements in columns, based on a set of properties that repeat from row to row |
|
|
Term
|
Definition
| atom that has a net positive or negative electric charge |
|
|
Term
|
Definition
| the force that holds cations and anions together |
|
|
Term
|
Definition
| a chemical bond in which two atoms share a pair of valence electrons. |
|
|
