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50 Cards in this Set

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  • Back
What is a physical change?
a physical change is a change that affects one or more of the substance's physical properties. an example of a physical change is an ice cube. it goes through physical change when it melts into water.
What is a chemical change?
a chemical change occurs when one or more substances are changed into entirly new substances. baking a cake is an example
explain the difference between a chemical property and a physical property
a physical property is what it looks like, and a chemical property is based on its ability to change.
which state of volume has a defanite volume and a definate shape?
a solid
what is the process of changing a liquid into a solid
what happens to the molecules in water when it changes from liquid to a gas
the molecules evaporate, adding energy to them so they can do so.
what happens to the molecules in water when it changes from a liquid to a solid
the molecules freeze, taking away energy to do so
anything that has mass and takes up space is _____
the ability to do work or to cause change is ____
a change from one form of energy to another is _______
energy conversion
state the Law of Conservation of Energy
"energy cannot be created nor destroyed; it only can change forms. the total amount of energy never changes".
you digest your food to regulate your body temp. describe the energy conversion that has taken place.
chemical to thermal
the energy of motion; amount depends on the speed and mass of object
kinetic energy
whenever an energy conversion is taking place, some energy is always lost to _______ energy
what type of energy is stored in a streched rubber band?
elastic potential energy
give three examples of fossil fules
coal; oil and natural gas
what are two energy conversions that take place in a battery-powered flashlight?
electrical to thermal; electrical to electromagnetic
are fossil fules renewable? why or why not?
fossil fules are non-renewable because there is a limited supply of them on Earth
give three examples of renewable reasources
solar; wind; geothermal
describe the differences in nuclear fusion and nuclear fission
fusion is combing the two nuclei, and fission is splitting the nucleus in half to make two nuclei
what is one advantage of using solar energy
solar energy is a renewable reasource
what energy conversion takes place in a hydroelectric power plant
kinetic to electrical
what energy conversions take place in a wind power plant
kinetic to electrical
the state in which one objects distance from another is changing is _____
how do you know when an object is in motion
if it changes position relative to a refrence point
a place or object used for comparison to determine if something is in motion is in ______
reference point
what is the formula for speed?
speed equals distance over time
when the speed of an object does not change, its traveling at a _______ speed
on a graph showing an object's speed, which varible would you label the x-axis and the y-axis
x-axis would be time, and y-axis would be distance
what are balanced forces?
forces that do not change an objects direction or motion
what are unblanced forces?
forces that cause objects to stop or start moving
two forces that you encounter every day
gravitational and contact force
two differences between continental and oceanic plates
their weight
land formation created when two continental plates collide
occurs when the plates are moving apart and new crust is created by magma pushing up from the earths crust
convergent boundary
occurs where the plates are moving apart and new crust is created by magma pushing up from the mantle
divergent boundary
located where two plates slide horizontally past one another
transform boundary
when rocks are squeezed together until they fold or break
rocks are pulled apart and streched out so the middle is thinner; faults- normal
rocks are pushed in two oppostie directions
movement of land in a strike-slip fault
hanging wall and foot wall move past each other sideways
movement of land in a normal fault
hanging wall moves down from tension
movement of land in a reverse fault
hanging wall moves up due to compression
the process by which parts of the crust are raised
why does magma tend to flow upward
magma is less dense than rock
a large mass of rock formed when a large body of magma cools inside the crust
formed when layers of ash and cinders build up around the centrel vent creating steep, cone shaped hills or mountains
cinder cone
formed when thin layers of lava flow gradually build a wide, gently sloping mountain
the process by which fragments of rock and soil are broken off from the ground surface and carried away
the process by which soil and rock are broken off from the ground surface and carried away