Heat Energy

Everything you need to know about HEAT ENERGY

1. Vocab of the Day

2. Types of Energy Notes

3. Conductors & Insulators

4. Thermal Expansion Article

5. Heat Transfer Notes

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​Today's Agenda

​Quizizz

Vocab of the Day

​Conduction

heat transfer between objects that are touching

Vocab of the Day

​Convection currents

when heating a liquid or gas, a circular motion is created from hotter fluids

Vocab of the Day

​insulator

a material that does not allow heat or electricity to pass through easily

Vocab of the Day

​conductor

a material that allows heat and/or electricity to pass through easily. Metals are usually the best conductors

Vocab of the Day

​thermal equilibrium

the point at which two objects are touching reach the same temperature

​​ Types of Energy Notes

• Energy - the ability to do work

• Kinetic energy - the energy of motion

• Thermal energy - the total kinetic energy due to the motion of the atoms in a substance

• Electrical Energy Transfer - When an electrical source (ex. battery or generator) is connected in a complete circuit to an electrical device

• Electromagnetic Waves - can transmit energy through matter or empty space

• Mechanical Energy Transfer - when a warm object is in contact with a cooler object

• Thermal energy is transferred through a material by the collision of atoms within the material

• Thermal energy is always transferred from warmer to cooler objects until thermal equilibrium is reached

​​ Conductors & Insulators

• Conductor - a material that transfers thermal or electrical energy very well

• Insulators do not let heat and electricity pass easily through them

• Thermal expansion - an increase in the size of a substance in response to an increase in the temperature of the substance

​​ Thermal Expansion Article

• Go to the link: https://shorturl.at/ENEDd

• Answer the next 4 questions

Open Ended

1. As you read, keep a tally of how many times the author uses the word “thermal expansion”. (expand, expanding, expanded)

Open Ended

2. What was the main idea of the article?

Open Ended

3. Why do bridges have expansion joints?

Open Ended

4. What is a major issue concerning expansion joints and why is it causing the bridges to “wreck?”

​​ Heat Transfer Notes

• CONDUCTION - heat transferred when two objects touch. (works best in solids)

• CONVECTION - heat transferred by the circulation or movement of a liquid or gas. (fluids)

• A fluid is a liquid or gas that has the ability to flow

• The upward movement of warm air and downward movement of cool air forms convection currents

• RADIATION - heat transferred through matter or empty space (no direct contact) by electromagnetic waves

Exit Ticket

Multiple Choice

Energy is

• a form of matter
• a type of energy drink
• the speed of light
• the ability to do work

Multiple Choice

Heat transfer goes from ___ to ____

• hot;cold

• cold;hot

Multiple Choice

An insulator is...?

• A substance that enhances the flow of heat.
• A type of liquid that promotes electrical conductivity.
• A material that resists the flow of electric current or heat.
• A material that conducts electricity easily.

Multiple Choice

Thermal expansion is...?

• the process of cooling an object to reduce its size.
• the increase in size of an object due to an increase in temperature.
• the change in color of an object due to temperature variations.
• the decrease in size of an object due to an increase in temperature.

Multiple Select

Select the three types of heat transfer

• Amplitude

• Conduction

• Convection

• Friction

• Radiation

Multiple Choice

Radiation is...?

• the process of cooling down objects.
• the absorption of energy by matter.
• the reflection of light off surfaces.
• the emission and transmission of energy in the form of waves or particles.