What is convection?

Which is a better absorber of infrared radiation?

Which is a better emitter of infrared radiation?

Which is a better reflector of infrared radiation?

Explain how it reduces heat loss, refer to conduction, convection or radiation. Heavy curtains, when closed, trap air next to a window.

Explain how it reduces heat loss, refer to conduction, convection or radiation. Shiny metal foil is fitted in the loft, covering the inside of the roof.

Explain how it reduces heat loss, refer to conduction, convection or radiation. Glass wool is used to fill the gap in the cavity walls.

Some water in a glass is being heated from below, as shown in the diagram. Name the process by which thermal energy is transferred through the glass. 

Some water in a glass is being heated from below, as shown in the diagram. Name the process by which thermal energy is transferred throughout the water.

An iron bar is held with one end in a fire. The other end soon becomes too hot to hold. How has the heat travelled along the iron bar.

A rod is made up of copper and wood joined together. After the rod is heated at the join in the center for about a minute, where would the lowest temperature be?

An experiment is set up to find out which metal is the best conductor of heat. Balls are stuck with wax to rods made from different metals, as shown in diagram X. The rods are heated at one end. Some of the balls fall off, leaving some as shown in diagram Y. Which labelled metal is the best conductor of heat.

A person holds a glass beaker in one hand and fills it quickly with hot water. It takes several seconds before his hand starts to feel the heat. Why is there this delay?

The diagram shows a heater used to heat a tank of cold water. What is the main process by which heat moves through the water?

Hot liquid in a vacuum flask cools extremely slowly. This is because some methods of heat transfer cannot take

place in a vacuum. Which methods cannot take place in a vacuum?

Bread can be cooked by placing it below, but not touching, a heating element. Which process transfers thermal energy from the heating element to the bread?

Two plastic cups are placed one inside the other. Hot water is poured into the inner cup and a lid is put on top as shown. Which statement is correct?

How could a convection current be set up in the water?

A heater is placed in a room. Which diagram shows the movement of air as the room is heated?

How does thermal energy (heat energy) travel through the vacuum between the Earth and the Sun?

Which line in the table is correct about conduction and convection?

A heating element is positioned in a narrow sealed tube of liquid. What would be the best place to position the heating element in order to obtain the best circulation of the liquid through the tube?

The diagram shows a block of ice placed in a warm room. At which point is the temperature the lowest?

The diagram shows four similar cans. Each can contains the same volume of water initially at 80 degrees Celsius. After five minutes, which can will contain the coolest water?

The heat from the hot water in a metal radiator passes through the metal and then spreads around the room. What are the main processes by which the heat is transferred through the radiator and then spread around the room?

A student needs a double-walled glass vessel to contain a hot liquid. What reduces heat losses by radiation?