Science Review~ Thermal

Which of these is a measure of the average kinetic energy of the molecules of a material?

• Heat

• Temperature

• Thermal energy

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A lizard sits on a hot rock to get warm. What type of thermal energy transfer is occurring?

• Conduction

• Convection

• Radiation

Eduardo puts a beaker of ice and water on a hot plate. After a few minutes, only liquid water is in the beaker. Eventually, the water boils. How is thermal energy being transferred in the WATER in this scenario?

• Conduction

• Convection

• Radiation

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If the temperature outside increases from 30 degrees Fahrenheit to 60 degrees Fahrenheit, how has the kinetic energy of the particles changed?

• The kinetic energy of the particles will decrease.

• The kinetic energy of the particles will remain the same.

• The kinetic energy of the particles will double.

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What is thermal energy?

• The average transfer of kinetic energy between two objects

• The average kinetic energy in an object

• The total kinetic energy in an object

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The scientific meaning of heat is

• The measure of the average kinetic energy of the particles in a substance.

• The movement of kinetic energy from substances or areas that are warmer to substances or areas that are colder.

• The measure of the total amount of kinetic energy in a substance.

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If you place a hot piece of metal in a container of water, thermal energy flows from the metal to the water. What happens after the metal and the water reach the same temperature?

• The flow of thermal energy stops, and the temperature remains constant.

• The flow of thermal energy continues and causes both substances to become warmer.

• The flow of thermal energy reverses and causes both substances to become warmer.

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A hot potato at 80 degrees Celsius is placed in a bowl of soup at 40 degrees Celsius. The surrounding room is at 20 degrees Celsius. Which correctly describes the directions of thermal energy transfer?

• Soup to potato, and potato to room
  

• Room to soup, and room to potato

• Potato to soup, and soup to room

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Throughout the day, Matthew and Mei measured the temperature of lake water as it was warmed by the sun. Here is the collected data:

9 am 12 degrees Celsius,

11 am 14 degrees Celsius,

3 pm 16 degrees Celsius,

5 pm 13 degrees Celsius .

At what time was the thermal energy of the lake water the greatest?

• 5 pm

• 3 pm

• 11 am

• 9 am

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Four objects are all made of iron. Which object has the most total amount of thermal energy?

• A 10 gram nail at 100 degrees Celsius

• A 4 gram spoon at 25 degrees Celsius

• A 136 gram frying pan at 50 degrees Celsius

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