Energy
Stored energy is also known as _________.
Potential Energy
A bottle cap lid is what type of simple machine?
Screw
The hottest layer
Thermosphere
What gas do we breathe in when we inhale?
Oxygen
At the top of a tall mountain, is air pressure low or high?
Low
Energy in motion is known as _________.
Kinetic energy
A bicycle, skateboard, and chromebook cart move using what simple machines?
Wheels and axles
Considered outer space
Exosphere
What gas do we breathe out when we exhale?
Carbon dioxide
How many air molecules in a given space can be defined as ____.
Air density
Thermal energy can also be called _________.
Heat
A door stop is what type of simple machine?
Wedge
Protects us from meteors
Mesosphere
21% of the air around us is this gas:
Oxygen
Is cold air less dense or more dense than warm air?
More dense
The sun's rays are a type of ________ energy.
electromagnetic
A wheelchair ramp is what kind of simple machine?
Inclined plane
Contains 99% of Earth's water vapor
Troposphere
78% of the air around us is this gas:
Nitrogen
Why are we not crushed by air pressure?
We have forces in our bodies pushing back
"Energy cannot be destroyed or created, but instead changes from one form to another" is known as what law?
Law of conservation of energy
What type of simple machine has a fulcrum?
Lever
Contains the Ozone layer
Stratosphere
List one gas that exists in air that makes up the remaining 1%
Argon, neon, helium, methane, carbon dioxide, water vapor
Why do people's ears pop on an airplane?
I'M LOOKING FOR A PARTICULAR WORD!
The air pressure EQUALIZES