Energy and Energy Transfer

Thermograms like this one created in winter show differences in temperature. Why do the windows of this house appear warmer than the rest of the house?

• The windows reflect visible light.

• The windows are allowing heat to escape from inside.

• The windows are heavily insulated.

• No heat is escaping through the windows.

What is the boiling point of water?

• 32° F

• 100° C

• 0° C

• 100° F

As a liquid begins to warm up over a burner, what happens to the density of the liquid?

• The density does not change.

• The liquid becomes more dense because the molecules slow down..

• The liquid becomes less dense because the molecules move faster and spread apart.

• The density of a substance has no relationship to thermal energy.

True or false: gases and liquids are both considered to be fluids.

• T

• F

According to the conservation of energy law, which statement is true about the energy in a system?

• If the potential energy increases, the kinetic energy decreases by the same amount.

• The potential energy and kinetic energy will increase at the same rate.

• The energy of a system is always being destroyed.

• Energy in a system is always being created.

The diagram shows a cart moving freely along a track. What happens to the energy of the cart as it moves from point A to point B on the diagram?

• Potential energy is transformed to kinetic energy.

• Kinetic energy is transformed to potential energy.

• Both potential energy and kinetic energy stay the same.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Which diagram models the position of a soccer ball when it has the greatest amount of gravitational potential energy?

• 
• 
• 

Tags

NGSS.MS-PS3-2

A nuclear power plant captures the energy created by the fission of the nuclei of uranium atoms and uses the generated energy to boil water. The boiled water creates steam that spins a series of turbines as it rises. As each turbine spins, it generates power that is sent into the power grid. Choose the correct sequence to fill in the blanks below. The uranium atoms contain __________ energy. The heat from their fission increases the __________ energy of the water. The spinning of the turbines is __________ energy that then generates __________ energy used in people’s homes.

• CDBA

• CBDA

• CADB

• CABD

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which is an example of something that transfers heat by radiation?

• the sun
• stove burner
• hot air balloon
• wind currents

Why does a blanket provide warmth to a person?

• it is a conductor of heat 
• it is unable to remain cool
• it is warmer than the air 
• it is an isulator