Unit 2 Energy

While on vacation, Carine rides in a hot-air balloon. To make the balloon rise, thepilot turns on a flame to warm the air inside the balloon. How does the air change?

• The motion of the particles increases.
• The air particles move closer together.
• The air changes to a different state of matter.
• The emperature of the air decreases.

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NGSS.MS-PS1-4

Deval drew the models below of particles in a substance. Which model bestrepresents the particles in a solid?

• Option A
• Option B
• Option C
• Option D

The amount of Kinetic Energy that an ice skater has on ice depends on what two factors?

• velocity and height
• velocity and how muscular their legs are 
• mass and height
• mass and velocity

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NGSS.MS-PS3-1

NGSS.MS-PS3-4

As Wilma holds a pan over a fire, the water begins to boil, as shown in the figurebelow.Which process is indicated by the letter X?

• convection
• conduction
• radiation
• insulation

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NGSS.MS-PS3-4

Which of the following is the transfer of energy as heat by the movement of a liquid or gas?

• radiation
• conduction
• convection
• emission

Inside a room, the air is often warmer near the ceiling than near the floor. Which ofthe following accounts for this difference?

• insulation
• convection
• conduction
• radiation

Energy exist in different forms.  What type of energy is stored in food?

• chemical energy
• sound energy
• mechanical energy
• electromagnetic  energy

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NGSS.MS-PS3-5

Energy due to position or shape

• potential energy

• kinetic energy

• mechanical energy

• joule

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NGSS.MS-PS3-2

Mechanical energy is

• always kinetic

• always potential

• Can be kinetic or potential or both

• changes in a closed system

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NGSS.MS-PS3-4

NGSS.MS-PS3-5

The transfer of heat by direct touch

• conduction

• convection

• radiation