Unit 7: Thermal Energy

A group of interacting, interrelated, or
interdependent elements forming a complex whole

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The movement of energy from one system
to another

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A condition in which all competing influences
are balanced

The total kinetic (motion) energy of the
tiny particles that make up matter; the faster
the particles move, the warmer the matter becomes

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4. Four containers made of different materials were set out on a table. Each container held water with a temperature of 30°C. The temperature of the water was measured after 15 minutes. 

5. Which container was the most effective at preventing heat transfer from the water to the environment?

• P

• Q

• R

• S

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1. What type of heat transfer occurs at point B in the diagram? 

• 1. Conduction; heat rises, cold sinks 

• 1. Convection; heat rises, cold sinks 

• 1. Conduction; cold rises, heat sinks 

• 1. Convection; cold rises, heat sinks 

Which of the answer choices best describes the following:

• 1.Thermal energy transfers through waves or rays. 

• 2. No matter is needed for thermal energy to travel. 

• 3. Ex. Energy from the Sun 

• All Thermal Energy

• Radiation

• Conduction

• Convection

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Which of the answer choices best describes the following:

• 1. Thermal energy transfers through contact.  

• 2. Ex. Holding an ice pack to cool down your skin 

• Insulation
• Radiation
• Conduction
• Convection

• Which of the answer choices best describes the following:

• 1. Thermal energy transfers through a liquid or gas.  

• 2. Energy moves from hot, high energy to cool, low energy. 

• 3. Ex. Boiling rice 

• Convection
• Radiation
• Conduction
• Insulation

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Which of the following materials is the best insulator of heat?

• Copper

• Glass

• Wood

• Aluminum

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