Rivers wear away rock in the same formation for many years.
How are canyons formed?
100
Condensation
What is the process called when water vapor turns back into water droplets in the water cycle?
100
Niche
Fill in the blank. Each population in an ecosystem has a role or ______.
100
a push or pull that causes an object to move, stop, or change direction.
What is a force?
100
The amount done for each unit of time.
What is power?
200
an opening in the Earth's crust that lets magma flow out and also releases gases, rocks and lava.
What is a volcano?
200
A barometer
What is the name of the tool used to measure air pressure?
200
They break down dead plants or animals and put nutrients back in the soil.
What are decomposer's jobs in the ecosystem?
200
When they act on an object the forces cancel each other out and don't change the objects motion or direction. If an object is still it will stay still.
What effect to BALANCED FORCES have on an object?
200
The use of force to move an object through a distance.
What is work?
300
Weathering
What is the process of breaking rock into soil or sand.
300
50%
What percentage of the sun's rays are absorbed by earths surface?
300
It shows the amount of energy able to pass from one level of the food chain to the next.
What is energy pyramid show?
300
Acceleration
Fill in the blank. When UNBALANCED FORCES act on an object, the object starts to move, speed up, slow down, stop or change directions this is called _____________.
300
A community and its physical environment together.
What is the definition of an ecosystem?
400
capes are strips of land that extend into the water.
What is the definition of cape?
400
Cirrus Clouds
What types of clouds are made from mostly ice crystals and thin and wispy?
400
Producers use sunlight to grow and are plants. They are always the fist level in the food chain.
In a food chain, what are producers?
400
Repulsion; Attraction
Fill in the blanks. MAGNETISM is the force of _________(pushing) or _________(pulling) between two poles of magnets.
400
The average kinetic energy of all molecules in an object.
What is the definition of temperature?
500
A triangular shaped land form at the mouth of a river.
What is a delta?
500
PREVAILING WINDS are global winds that blow constantly from the same direction.
What are PREVAILING WINDS?
500
10%
What percent of energy is passed on to organisms in the next higher level of an energy pyramid?
500
300 Joules of work
If you lift a 100 newton textbook 3 meters, how many Joules of work do you do?
500
A force that opposes, or acts against, motion when two surfaces rub against each other.