Energy : Conservation and Transfer

Energy : Conservation and Transfer

6.P.3 - Understand characteristics of energy transfer and interactions of matter and energy.

6.P.3.1

6.P.3.1 - Illustrate the transfer of heat energy from warmer objects to cooler ones using examples of conduction, radiation  and convection and the effect that may result.

Poll

What is thermal energy?

• Heat

• Conductor

• Insulator

Thermal Energy

Thermal energy is also known as heat. Thermal energy is tranferred through a material by the collision of atoms within the material.

Multiple Choice

Heat flows through material or across space from ______ objects to ______ objects until both are at equilibrium.

• Cooler, warmer

• Cooler, cooler

• Warm, cooler

• Warm, warm

Heat

Heat flows from a warmer object to a cooler object until both objects are the same temperature.

Multiple Select

The three ways heat can be transferred are? Check all that apply.

• Conduction

• Radiation

• Convection

• Thermal energy

Multiple Choice

The transfer of heat through a material by direct contact is known as?

• Convection

• Radiation

• Conduction

• Ultraviolet Light

Poll

Which if the following is an example of conduction?

Multiple Choice

Heat is circulated in fluids both liquids and gases through the process of __________.

• Radiation

• Convection

• Conduction

• Infrared Light

Poll

The Sun's energy is what type of heat transfer?

• Radiation

• Convection

Different ways heat is transferred

• Conduction - Direct contact

• Radiation - The energy that travels across distances in the form of electromagnetic waves.

• Convection- Heat is circulated in fluids, both liquids and gases.

6.P.3.2

Explain the effects of electromagnetic waves on various materials to include absorption, refraction, reflection and change of temperature.

Poll

Light and other electromagnetic waves can warm objects.

• True

• False

Multiple Choice

What causes electromagnetic waves?

• Vibrations

• Water

• Light

• Conduction

Electromagnetic waves

Electromagnetic waves are waves that are created as a result of vibrations between an electric field and a magnetic field.

Multiple Choice

This is an example of?

• Refraction

• Reflection

• Absorption

Scattering

Scattering is what makes the sky blue.

Poll

The sun is a major source of?

• Conduction

• Energy

Sun

The sun is a major source of energy for changes on the earth's surface. The sun loses energy by giving off light.

Light Wavelengths - We are only able to see certain light that is being exposed by the sun.

• Visible Light - Light we can see

• Infrared Light - Light that has a heating effect. We can't see this but we can feel it.

• Ultraviolet Light - Light that causes sunburns. We can't see it.

6.P.3.3

Explain the suitability of materials for use in technological design based on a response to heat (to include conduction, expansion, and contraction) and electrical energy (conductor and insulators)

Multiple Select

Which of the following are conductors?

• Steel

• Plastic

• Aluminum

• Spatula

Thermal Conductors

Thermal conductors are things that we use daily that can heat up easily. These are mostly the metal objects you use daily.

Poll

Which of the following is a thermal insulator?

• Pot handle

• Copper

Thermal Insulators

Thermal insulators are things we use that don't heat up easily.

Multiple Choice

What is happening in this picture?

• Thermal Contraction

• Thermal Expansion

Thermal Expansion

Matter changes its shape, area, volume, and density in response to a change in temperature. Bridges have expansion joint strips to help the bridge from breaking due to the expanding of molecules when it is very hot.

Thermal contraction

• Thermal contraction is the opposite of thermal expansion.

• When materials cool down, the molecules will slow down and slowly contract (get smaller)

• Bridge joint strips (mentioned in the previous slide) allows for bridges to contract in cold weather and not break.

Poll

Metals are known as electrical insulators

• True

• False

Electrical Conductor

• An electrical conductor is a material that allows for an electrical current to flow through easily.

• Most metals are electrical conductors.

Electrical Insulator

• An electrical insulator is a material that doesn't allow energy to flow through easily.

• Rubber, glass, porcelain, and ceramic.

Poll

When molecules are heated, they move very ________.

• Fast

• Slow