Heat transfer 3

Warm air rises and the cool air sinks demonstrates this type of heat transfer. 

• conduction
• convection
• radiation
• Insolation 

In heat transfer, heat always flows from the _______________ substance to the _______________ substance.

• Hotter to colder
• Colder to hotter
• Hotter to hotter
• Colder to colder

Vivian placed an ice cube in a tray of warm water. The following picture shows her investigation.  Which statement describes the energy transfer that happens in Vivian’s investigation?

• Energy in the form of heat is transferred from the ice cube to the water by radiation.
• Energy in the form of  heat is transferred from the water to the ice cube by radiation.
• Energy in the form of  heat is transferred from the ice cube to the water by conduction.
• Energy in the form of  heat is transferred from the water to the ice cube by conduction.

In this experiment, the WARM red dye and the COLD blue dye were placed in the water at the same time. The warm red dye rose to the top while the cold blue dye sank to the bottom.

• conduction
• convection
• radiation

Which direction will the heat flow while this ice cap melts?

• there is no heat transfer
• from the icecap to the water
• from the water to the icecap

A group of friends gather around a fire to stay warm.

• conduction
• convection
• radiation

Heat transfers from an area of ____temperature to an area of ___ temperature.

• high to low
• low to high
• high to high

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

• more
• less

What is the definition of CONDUCTION?

• When heat is transferred from objects like rays of light or electromagnetically.
• a  hot liquid or air that  expands, becomes less dense, and rises or becomes more dense, and sinks.
• When heat transfers from objects that are touching.
• When heat transfers through the heater or AC in your house.

Molecules in cold things move more _________
than in hot things.

• quickly
• slowly
• happily
• merrily