Show:
Organisms and Ecosystems
Earth and Space
Structure and History of Earth
Force, Motion & Energy
Properties of Matter
100
The source of all energy in a food web.
What is the sun?
100
Rotates on axis, frozen water, no atmosphere
What is the moon?
100
Natural resources that cannot be replaced in a human lifetime
What are non-renewable resources?
100
Allow electricity or heat to flow easily
What are conductors?
100
The ability to float
What is buoyancy?
200
This gas is exhaled by humans and used by plants to make food.
What is carbon dioxide?
200
This action of Earth causes day and night
What is rotation?
200
Dead microscopic plants and animals in ancient seas
What causes the formation of oil and natural gas?
200
It bounces off an object
What happens when light reflects?
200
It floats
What does an object do if it is less dense than something else?
300
These tiny holes on the underside of a leaf serve as a "doorway" for gases and water vapor.
What are the stomata?
300
The process by which water vapor turns back to liquid water when cooled.
What is condensation?
300
One disadvantage of this renewable energy resource is that it must be burned to produce energy.
What are biofuels?
300
This metal is a good conductor of electricity and heat. However, it is not magnetic.
What is aluminum?
300
a combination of 2 or more substances that 1) change their physical properties when combined and 2) are evenly mixed
What is a solution?
400
The sixth planet from the Sun
What is Saturn?
400
Logical conclusions scientists make based on fossil evidence.
What are inferences?
400
Sliding on ice, adding wheels, adding wax to a surface
What are some ways to reduce the amount of friction?
400
Beads of water collecting on the outside of a cold glass of water
What is an example of condensation?
500
4 weeks
Approximately how many weeks is one full cycle of the moon?
500
The process by which layers of sediment turn into hard rock over millions of years
What is cementation?
500
One changes the state of matter; the other changes the chemical composition of a material
What is the difference between a physical change of matter and a chemical change of matter?
500
The substance in which another substance will dissolve
What is the solvent?