7.7cd and 7.8abc

Front

What is the speed of segment A?

Back

2 m/s

Front

In which cup do the coffee molecules have higher temperature: Cup 1 at 27° C or Cup 2 at 52° C?

Back

Cup 2 because the molecules are moving faster.

Front

What phenomenon causes it to be warmer in the attic of your house than in your basement?

Back

Convection.

Front

How does the speed of the molecules in Croc 1 compare to the speed of the molecules in Croc 2 if Croc 1 has more thermal energy?

Back

Croc 1's molecules move faster.

Front

What is the circular motion of hot air rising and cold air sinking called?

Back

Convection Currents.

Front

Define thermal energy.

Back

Thermal energy is the total kinetic energy of the particles in a substance.

Front

What is the relationship between temperature and the speed of molecules in a substance?

Back

As temperature increases, the speed of the molecules increases.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases).

Front

What are convection currents?

Back

Convection currents are the movement of fluid caused by differences in temperature and density within the fluid.

Front

How does density affect the movement of fluids in convection?

Back

Less dense fluids rise while more dense fluids sink.