Chapter 4 Test Chapter 4 Test By: T and R and TBy: T and R and T

Unit 4 lesson 1 objectives!• Describe the relationship between work and energy!• Relate Kinetic Energy to mass and speed!• Analyze how Potential Energy is related to an object’s position!• Give examples of major forms of energy and explain how each is produced!

Answers part #1

#1- When work is done on an object energy is transferred to that object!

#2- The Kinetic Energy depends on any moving object!

#3- The energy is stored as a result of height and shape (position)!

Energy Example How it’s produced

Kinetic Energy Rain falling By the energy of motion.

Potential EnergyRain after it hits the

groundEnergy that is stored in

result of position.

Gravitational Potential Energy

A diver standing motionless on the end of

a diving board.

It depends on the objects height, mass,

and acceleration.

Elastic Potential Energy Stretched rubber bandAn object being

stretched or compressed

Mechanical Energy A wind up toy

You twist the wind up toy which turns the

gears that makes the toy move

#4

Energy Example How it’s Produced

Thermal Energy Thermal UnderwearThe atoms move

faster

Chemical EnergyToasting a

marshmallow over a fire

Energy is released and heats the marshmallow

Electrical Energy LighteningEnergy is associated with electric charges

Electromagnetic Energy

Satellite in space Waves

Nuclear Energy Nuclear bomb

The atoms are surrounded by

nuclear and when they get stuck it

explodes

Section 4-2 objectives Section 4-2 objectives 1.Describe conversions of energy from one

form to another.

2.State and apply the law of conservation of energy.

3.Analyze how energy is conserved in conversions between KE and PE.

4.Describe the relationship between energy and mass.

AnswersAnswers

1.1. The conversion is like cause and effect. Example a bird The conversion is like cause and effect. Example a bird with a ouster it’s increasing the oysters potential with a ouster it’s increasing the oysters potential energy. Bird drops oyster and the potential energy to energy. Bird drops oyster and the potential energy to kinetic energy. Then the oyster falls and hits the rock kinetic energy. Then the oyster falls and hits the rock and breaks. Kinetic Energy is converted to work and and breaks. Kinetic Energy is converted to work and thermal energy .thermal energy .

2.2. States that energy can’t be created or destroyed.States that energy can’t be created or destroyed.

3.3. The energy has to be present at the beginning of a The energy has to be present at the beginning of a process is the same as the amount of energy at the process is the same as the amount of energy at the end.end.

4.4. There is not a relationship.There is not a relationship.

Chapter 4 lesson 3 Objectives

Classify energy resources as renewable or non renewable!Evaluate benefits and drawbacks of different energy sources!Describe ways to conserve energy!

Energy Renewable Non- Renewable

Fossil Fuels *Hydroelectric

Energy *Solar Energy *Geothermal

Energy *Biomass Energy *Hydrogen Fuel

Cell *Wind Energy *

Nuclear Energy *

Renewable and Non- Renewable Energy

#1

Energy Benefits Draw BacksFossil Fuels

Inexpensive and easy to get

It pollutes

Solar EnergyNo pollution and

low costMust have sun

Hydroelectric Energy

No pollution and low cost

Environmental impact disrupts wild

life

Geothermal Energy

No pollution Not very accessible

Biomass EnergyCheap and renewable

Pollution

Hydrogen fuel cell

No pollution Not as efficient

Wind EnergyNo pollution, low

cost, and renewable

Needs wind and space

#2

Ways to conserve energy!Ways to conserve energy!

Turn off lights when not using!Turn off lights when not using!Unplug everything you’re not using!Unplug everything you’re not using!Ride your bike instead of your car!Ride your bike instead of your car!

Use florescent lights!Use florescent lights!Use solar powered cars!Use solar powered cars!