Conduction, Convection, Radiation 2

Emily made a cup of tea and stirred it with a spoon. The spoon became warm, How was the heat from the tea transferred to the spoon?

• Convection
• Radiation
• Conduction
• Evaporation

A student wants to lower the temperature of a metal coin. Which action would make the coin the coldest?

• Placing the coin in a freezer
• Placing the coin in cool water
• Leaving the coin on a counter
• Rubbing the coin with cold hands

A hot rock is dropped into a pail of cool water. Heat energy transferred from the rock to the water by

• Boiling
• Evaporation
• Conduction
• Radiation

A hot water bottle is placed under a pillow. What happens to the heat energy?

• The heat spreads from the water bottle to the pillow.
• The heat in the bottle absorbs the heat from the pillow
• The heat in the bottle changes to chemical energy
• The heat energy builds up and increases the waters temperature.

The best example of heat transfer by convection is when

• Sunlight warms soil
• A ceiling fan blows air
• Flames heat up a pan
• Heat rises in a chimney

A pan of soup is being heated on an electric stove. A metal spoon is used to occasionally stir the soup. Which of the following is an example of heat being transferred by convection?

• Heating the pan
• Heating the soup
• Heating the spoon
• Heating the burner

Which numbered part of the picture represents the way that energy from the sun reaches Earth?

• 1
• 2
• 3
• 4

What causes the circulation of air in the atmosphere?

• Air in the atmosphere is heated by the sun and sinks to the ground.
• The ground is heated by the sun and then heats the air, causing the air to rise.
• Air loses heat to the ground and then rises upward to obtain more energy.
• The sun heats the clouds which forces the cooler air to move away and sink.

What is the original source of most of the energy that people use?

• Energy that reaches Earth by radiation from the sun.
• Energy that reaches the earth by convection from the sun.
• Energy that reaches the earth by radiation from the core.
• Energy that reaches the earth by conduction from the core.

A crayon placed on a dark driveway in bright sunlight melted into a colorful puddle. What caused the crayon to melt?

• Solar radiation heated the driveway and then heat transferred to the crayon by conduction.
• Solar radiation heated the driveway and then heat transferred to the crayon by radiation.
• Solar convection heated the driveway and then heat transferred to the crayon by radiation.
• Solar convection heated the driveway and then heat transferred to the crayon by conduction.