Energy Transformations Part 2

Questions and Answers

What are the energy transformations in a flashlight?

Chemical energy -> Electrical energy -> Light energy

What are the energy transformations as you eat food and then walk to class?

Chemical energy -> Mechanical energy

What energy transformations happen as a wind turbine is spun by the wind and then is transferred into electricity?

Mechanical -> Electrical energy

What is potential energy?

Energy that is stored in a system or object Signup and view all the answers

What is kinetic energy?

Energy of motion Signup and view all the answers

What is a compound?

Made up of two or more elements Signup and view all the answers

What is an element?

Made up of one type of atom Signup and view all the answers

What is energy?

The ability to do work Signup and view all the answers

Where does a roller coaster have potential energy?

At the top of a hill Signup and view all the answers

Where does a roller coaster have kinetic energy?

At the bottom of a hill Signup and view all the answers

What is a chemical reaction?

Produces a new substance Signup and view all the answers

What is a physical reaction?

Changes the form of something. Does NOT produce a new substance Signup and view all the answers

Study Notes

Energy Transformations

Flashlight transforms chemical energy stored in batteries into electrical energy, which is then converted into light energy.
When food is consumed, chemical energy is converted into mechanical energy as the body performs physical activities like walking.

Wind Turbines

Wind turbines convert mechanical energy from wind movement into electrical energy that can be used for power.

Types of Energy

Potential Energy: Energy that is stored within an object or system, capable of being released to do work.
Kinetic Energy: Energy associated with the motion of an object, increasing as the object's speed increases.

Chemical and Physical Changes

Compound: A substance formed from two or more different elements chemically bonded.
Element: A pure substance consisting of only one type of atom, cannot be broken down into simpler substances.
Energy: Defined as the capacity to perform work in a system or process.

Roller Coaster Energy

A roller coaster has maximum potential energy at the top of a hill where it is elevated.
Kinetic energy is at its peak when the roller coaster is at the bottom of a hill, moving at high speed.

Reactions

Chemical Reaction: A process that results in the formation of a new substance, often involving the breaking and forming of bonds.
Physical Reaction: A process that alters the physical form of a substance without changing its chemical identity, thus no new substance is created.

Description

This quiz focuses on the various energy transformations that occur in different scenarios, including the flashlight, food consumption, and wind turbines. Test your understanding of how energy changes form in practical applications. Perfect for students studying energy concepts in physics.