PS3-3 Thermal Energy

What is an example of conduction?

• Touching a hot stove and feeling the heat transfer to your hand.

• Boiling water in a pot on the stove.

• Using a microwave to heat food.

• Feeling the warmth of the sun on your skin.

What is the best conductor of heat?

• Wood

• Plastic

• Metal

• Glass

What happens to thermal energy when ice melts?

• Thermal energy is released, causing the ice to freeze further.

• Thermal energy is absorbed, causing the ice to change from solid to liquid.

• Thermal energy remains constant, and the ice does not change state.

• Thermal energy is converted into kinetic energy, causing the ice to evaporate.

What is thermal energy?

• The energy produced by burning fossil fuels.

• The total energy of all the particles in an object, which is related to its temperature.

• The energy stored in chemical bonds of molecules.

• The energy associated with the motion of an object.

How does the number of molecules affect thermal energy?

• The total thermal energy is lower when there are more molecules.

• The total thermal energy is higher when there are more molecules, even if their temperature is lower.

• The number of molecules has no effect on thermal energy.

• Thermal energy is only dependent on the temperature of the molecules.

What happens to air in a hot air balloon?

• The air inside the hot air balloon becomes less dense and rises due to convection.

• The air inside the hot air balloon cools down and sinks.

• The air outside the hot air balloon becomes warmer and rises.

• The air inside the hot air balloon remains the same temperature and density.

What is the role of insulators?

• Insulators are materials that slow down the transfer of heat, such as styrofoam or glass.

• Insulators are materials that enhance the transfer of heat, such as metals.

• Insulators are materials that conduct electricity efficiently, such as copper.

• Insulators are materials that absorb heat without transferring it, such as rubber.

How does heat transfer affect weather patterns?

• Heat transfer through convection in the atmosphere affects weather patterns, such as wind and storms.

• Heat transfer has no effect on weather patterns.

• Heat transfer only affects temperature, not weather patterns.

• Heat transfer is only relevant in ocean currents, not in the atmosphere.

What is an example of radiation?

• Feeling the warmth of the sun on your skin.

• The sound of a bell ringing.

• The taste of salt in food.

• The sight of a rainbow in the sky.

What is conduction?

• Conduction is the transfer of thermal energy through direct contact between materials.

• Conduction is the process of heat transfer through fluids without direct contact.

• Conduction is the movement of energy through electromagnetic waves.

• Conduction is the transfer of energy through the movement of particles in a gas.