Unit 2 Lesson 2 - How is Energy Transferred?

An ice cube is placed in a glass of warm tea. Later, the ice has melted, and the tea is cooler. What is true about the transfer of energy?

• Heat has been transferred from the ice cube to the warm tea.

• Heat from the warm tea has been transferred to the ice cubes and the glass.

• Light energy from the warm tea has been transferred to the ice cubes.

• Electrical energy has been transferred from the tea to the surrounding air and glass.

Answer explanation

Heat transfers from warm objects to cold objects

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What energy transfer occurs in a solar panel?

• Mechanical energy is transferred to the panel when waves from the sun push against the panel and move it.

• Heat is transferred to the panel when it is connected to an electrical source.

• Electrical energy is transferred to the panel when it is connected with an electrical source.

• Energy is transferred to the panel when light waves from the sun are absorbed by the panel.

Tags

NGSS.MS-PS4-2

Which of these is an example of how heat can transfer by touching an object?

• the sun heating a pond

• warming hands on a cup of hot chocolate

• snow melting on a hot day

• a person keeping warm by a fire

Tags

NGSS.4-PS3-2

Through which of these materials do sound waves travel most slowly?

• air

• iron

• wood

• water

Tags

NGSS.MS-PS4-2

Which form of energy results from vibrations that travel through air?

• chemical energy

• sound energy

• potential energy

• electrical energy

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

The pictures show four cups of water. Each cup of water has a thermometer in it. Identify the cup of water that has the most energy.

• Cup 1

• Cup 2

• Cup 3

• Cup 4

Answer explanation

The thermometers show that the temperature in cup 2 is the highest. Because that cup of water is hottest, it has the most energy.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Students use a solar cooker to heat some food.

Identify where the energy comes from.

• Water

• Air

• Sunlight

• An Oven

Tags

NGSS.MS-PS3-3