Science Practice: Unit 2, Energy

When an object is heated up, its _______ energy is increased.

• chemical

• thermal

• mechanical

Answer explanation

Unit 2 Notes- Slide #7

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Why does a popsicle melt on your tongue?

• Heat from the popsicle is transferred to your tongue

• The popsicle transfers cold to your tongue

• Heat is transferred from your tongue to the popsicle

Answer explanation

Unit 2 Notes - Slide #8

Tags

NGSS.MS-PS1-4

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If the two blocks in the picture have reached thermal equilibrium, what temperature is the second block?

• 50* C

• 0* C

• 25 *C

Answer explanation

Unit 2 Notes- Slide #10

Tags

NGSS.MS-PS1-4

What happens to the kinetic energy of an object's molecules if the temperature increases?

• The kinetic energy of the molecules increases

• The kinetic energy of the molecules decreases

• The kinetic energy will stay the same.

Answer explanation

Unit 2 Notes - Slide #7

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When the temperature of a substances decreases, what happens to the motion of the molecules inside?

• The molecules slow down

• The molecules speed up

• The molecules double in size

Answer explanation

Unit 2 Notes- Slide #7

Tags

NGSS.MS-PS1-4

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In order for liquid water to become steam, it has to ___________ energy to change states.

• create

• release

• absorb

Answer explanation

Unit 2 Notes- Slide #7-8

We have to add heat to boil water into steam!

Heat is absorbed (taken in) by the water to move the particles faster/further apart.

Tags

NGSS.MS-PS1-4

Which activity uses fossil fuels directly?

• Walking to a friend's house

• Riding your gas-powered four-wheeler

• Burning wood to heat your home

Answer explanation

Gasoline is refined from oil, a type of fossil fuel.

Which activity uses fossil fuels indirectly?

• Getting plastic bags at the grocery store

• Taking an afternoon nap

• Riding your bike to a park

Answer explanation

Plastic bags (and other plastic items) are made of petroleum, an oil-based product derived from fossil fuels!

What do we call the process of splitting large atoms into smaller atoms in order to release energy?

• Nuclear fission

• Nuclear fishing

• Nuclear fusion

Answer explanation

Unit 2 Notes - Slide #32

"Fission"- to separate or split apart

Tags

NGSS.HS-PS1-8

What do we call the process of combining two atoms into a larger atom?

• Nuclear fission

• Nuclear fishing

• Nuclear fusion

Answer explanation

Unit 2 Notes- Slide #32

"Fuse"- to combine separate parts together

Tags

NGSS.HS-PS1-8