Warm air is __________ dense than cold air and rises creating convection currents.

• more
• less

These materials are considered good thermal conductors.

• cotton balls
• wood
• metals
• fiberglass

A thermal insulator doesn't allow heat to pass through it easily.

• True 
• False

In which state does water the lowest average kinetic energy

• Liquid
• Gas
• Solid
• Others

Snowman melting in the sun.

• Conduction
• Convection
• Radiation

Tags

NGSS.MS-PS3-4

The warm air from this heater creates a current when the warm air rises and the cold air sinks.

• conduction
• convection
• radiation

Tags

NGSS.MS-ESS2-6

Hot coffee is stirred with a spoon; the spoon gets hot due to

• conduction
• convection
• radiation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A chair is several feet from a fireplace. The side of the chair facing the fireplace gets warm due to

• conduction
• convection
• radiation

"Lava lamps" contain colored liquids. These liquids form globs that rise to the top due to

• conduction
• convection
• radiation

Tags

NGSS.MS-PS1-4

Near the ceiling of a room the air is warmer; the warm air rises because of

• conduction
• convection
• radiation