Thermal Convection

The diagram shows some rice being boiled in a pan. What is the main methods by which thermal energy is transferred (i) through the metal pan and (ii) through the water?

• (i) conduction (ii) conduction

• (i) convection (ii) convection

• (i) conduction (ii) convection

• (i) convection (ii) conduction

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Which is the best position to place the heating element in an electric heater?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

In the process of convection, energy is transferred _________.

• because of temperature differences in a solid

• because of density differences in a liquid

• by the diffusion of molecules throughout a fluid

• by the vibration of molecules

Tags

NGSS.MS-PS3-4

When air is heated, its volume ____________.

• increases

• decreases

• remains the same

Tags

NGSS.MS-PS1-4

Convection can take place in ____________.

• solids only.

• liquids only.

• liguids and gases only.

• solids, liquids and gases.

Tags

NGSS.MS-ESS2-6

Transfer of thermal energy caused by the rising of hotter less dense fluids and the sinking of cooler more dense fluids:

• convection

• conduction

• radiation

• density

Tags

NGSS.MS-ESS2-6

Soup molecules moving and heating up on the stove is an example of...

• conduction.

• convection.

• radiation.

The molten rock in the mantle becomes hotter and less dense near the...

• crust.

• core.

Hotter, less dense magma near the core...

• rises.

• sinks.

Tags

NGSS.MS-ESS2-1

Which of the following best describes thermal convection?

• Transfer of heat through direct contact

• Transfer of heat through electromagnetic waves

• Transfer of heat by the movement of fluids

• Transfer of heat through vacuum