Learning Objectives

• Describe how energy can change from one form into another.

• Explain the law of conservation of energy in a closed system.

• Apply energy transformation and conservation concepts to real-world examples.

• Differentiate between single and multiple steps of energy transformations.

Key Vocabulary

Energy Transformation

The process of energy changing from one form to another, like a toaster making heat.

Single Transformation

This occurs when energy changes its form only once, such as in a household toaster.

Multiple Transformations

A series of energy changes, like digesting food for movement and maintaining your body temperature.

Energy Conservation Law

This law states energy cannot be created or destroyed, only transferred or changed into different forms.

Kinetic Energy

The form of energy that an object possesses due to its motion, like a rolling ball.

Thermal Energy

The energy that comes from heat, generated by the movement of tiny particles within an object.

Key Vocabulary

Chemical Energy

Energy stored in the bonds of chemical compounds and released during a chemical reaction.

Energy Can Change Form

• Energy can be transformed from one form to another.

• A toaster changes electrical energy directly into thermal energy.

• Eating toast involves multiple transformations, like chemical to kinetic energy.

The Law of Conservation of Energy

• Energy is constant; it cannot be created or destroyed, only transferred or transformed.

• A baseball's kinetic energy transfers to the air, becoming thermal energy from friction.

• A baseball travels farther in thin air because less energy becomes heat.

Common Misconceptions

Summary

• Energy can be transformed from one form to another in single or multiple steps.

• The law of conservation of energy states that energy is never created or destroyed.

• Seemingly 'lost' energy is often transformed into other forms, like thermal energy from friction.

• Energy transformation and conservation are seen in everyday examples like eating or a flying baseball.