Energy Conservation and Transfer

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What is the law of conservation of energy?

Energy cannot be created or destroyed, only transformed or transferred.

What is energy transfer?

Energy transfer is the process of energy moving from one place or object to another.

Give an example of energy transfer in everyday life.

When you eat food, chemical energy is transferred into kinetic energy for movement.

What happens to energy lost in a system?

It is often converted into thermal energy or sound energy.

How does friction affect energy transfer?

Friction converts kinetic energy into thermal energy, slowing objects down.

What is an energy transformation?

An energy transformation is the process of changing energy from one form to another.

Give an example of energy transformation.

In a toaster, electrical energy is transformed into thermal energy to toast bread.

What is work in terms of energy?

Work is done when energy is transferred to an object causing it to move.

How is heat transferred between objects?

Heat can be transferred through conduction, convection, and radiation.

What is conduction?

Conduction is the transfer of heat through direct contact between materials.

What is convection?

Convection is the heat transfer through fluid movements like in liquids or gases.

What is radiation in terms of energy transfer?

Radiation is the transfer of energy by electromagnetic waves, such as sunlight.

Why do insulators reduce energy transfer?

Insulators have low thermal conductivity, preventing heat from passing through easily.

How does a heat engine perform work?

A heat engine converts thermal energy into mechanical work.

What is a real-life example of radiation?

The sun warming the Earth's surface.