Heat Transfer Questions

Which best explains how a fluid (liquid or gas) is heated?

• radiation

• convection

• conduction

Which best describes how heat travels from one solid to another solid?

• through conduction

• through convection

• through radiation

Which best describes how heat is transferred by convection?

• through direct contact through hot objects

• through the movement of gases or liquids

• through the absorption of the sun's energy

• through the process of liquids changing into gas.

Sam is cooking an egg in a pan on the stove. Which causes the metal pan to become hot?

• convection

• radiation

• conduction

• evaporation

What conditions are necessary for heat conduction to occur between two objects?

• The objects must be surrounded by air or water.

• Two objects at difference temperatures are touching each other.

• Two objects at different temperatures are close to each other.

• One object must emit energy as light and heat and another object absorbs the energy.

People sitting around a campfire are able to feel the heat from the fire. How are the people able to feel the heat from the fire without touching

the fire?

• The heat from the fire travels through the ground and heats the

  ground around the people.

• The heat from the fire is conducted through air molecules to the

  people.

• The heat from the fire rises in the air and then settles around the

  people.

• The heat from the fire radiates from the fire to the people.

Which best explains why a pan placed on a hot stove top will begin to warm?

• conduction

• convection

• radiation

Which best exemplifies how heat is transferred by radiation?

• sand becoming hot in the sunlight

• metal handle on a pan becoming hot

• metal ice rack thawing in the refrigerator

• blanket holding body heat to keep a person warm

Handles on metal pans are often coated with plastic. What is the most likely reason for this?

• Plastic is a good conductor of heat.

• Metal is a poor conductor of heat.

• Plastic is a poor conductor of heat.

• Metal and plastic are good conductors of heat.

Which shows an example of convection?

• Jose cooks an egg in a pot of boiling water.

• Clara burns her hand by touching a light bulb.

• Lucy wraps herself in an electric blanket to keep warm.

• Ben holds the end of a metal rod in fire to cook hot dogs.