Unit 2 Review

What is the energy transformation of a cell phone playing a video on Tiktok?

• Electromagnetic to potential to mechanical to sound energy.

• Chemical to kinetic to sound energy.

• Electromagnetic to heat energy.

• Chemical to electromagnetic to mechanical to sound energy.

Tags

NGSS.HS-PS3-3

NGSS.HS-PS4-5

What is the energy transformation of the object in the picture?

• Chemical--> electromagnetic--> sound--> light

• Chemical--> electrical--> light

• Electric--> chemical--> light

• Chemical--> light

Potential and kinetic energy change as the ball bounces. Why does it stop bouncing?

• The energy is transformed to potential energy.

• The energy is transformed to heat and sound energy as the ball hits the ground.

• The mass is too small.

• Gravity pulls on the ball. This energy is greater than the mass of the ball.

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NGSS.MS-PS3-2

NGSS.MS-PS3-5

What is an example of an object that uses solar energy and convert it to chemical energy.

• An apple tree doing photosynthesis.

• Water being evaporated from the ocean.

• The heating of rock from the sun.

• A battery in a car.

Tags

NGSS.MS-LS1-6

Does this object have energy?

• No it is not boiling.

• Yes, it has thermal energy.

• No, it has atoms of hydrogen and oxygen.

• Yes, it has evaporated so there is less mass.

Tags

NGSS.MS-PS1-4

How does temperature effect the state of matter of water?

• Temperature can physically change matter.

• Temperature chemically changes matter.

• When hot atoms move less.

• When cold the atoms have the most energy.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Why does your desk feel cold when you put your hands on it?

• The thermal energy from your desk transfers to the hands and your hand feels cold.

• The table feels cold because it is at a lower temperature than your hand and thermal energy transfers from your hand to the desk.

• The desk is cold blooded and cannot make its own warmth.

• It is radiation energy transferring to your hands from the desk.

Tags

NGSS.MS-PS1-4

My tea is 90 degrees Celsius I put a spoon in the tea that is 25 degrees Celsius what happens in this system?

• The tea transfers heat to the spoon until they reach thermal equilibrium.

• The spoon will stay the same temperature.

• The tea will gain thermal energy.

• I eat cookies.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which object in the image has the most energy? Assume all glasses have the same temperature.

• The one with the smallest mass.

• The one with the most mass.

• The one I drink during lunch.

• The one with ice in it.

Tags

NGSS.MS-PS3-4

The sun on my skin is this kind of heat transfer.

• conduction

• radiation

• compaction

• convection