11. 2 imagine... you’ve been swimming for a long time friends ask you to play volleyball
TRANSCRIPT
11
2
Imagine . . . You’ve been swimming for a long time
Friends ask you to play volleyball
3
You say you don’t have the energy
What exactly do you mean?
What is energy?
4
Vocabulary
Energy
The ability to do work
5
Moving things is a type of work
When you hit a volleyballYou move it!
6
When you jump and runYou move yourself!
Playing volleyball, jumping, and running all take
ENERGY
7
There are several types of energy
1. Mechanical Energy
When something moves It is using mechanical
energy
8
2. Heat Energy
Heat energy passes heat from one object to another
9
3. Electric energy
Electric energy makes light bulbs light up and radios
play.
10
4. Chemical energy
Gasoline has chemical energy.
When gasoline is burned in a car’s engine, the chemical
energy is changed to mechanical energy
11
The mechanical energy moves the car
12
Energyis not matter
Because It does not have mass
ortake up space
Matter takes up space
13
You cannot see energybut
you can see what energy does
Each kind of energycan change into other
kinds of energy
14
All the energy in the world comes from the sun
The sun’s energy is called
Solar Energy
15
On Earth, solar energy is changed
into other kinds of energy
Nothing on Earth could live without
energy from the sun
16
Plants could not live withoutsolar energy
Plants make their ownfood
17
Plants make food out of water from the soil
and
Gas in the air calledcarbon dioxide (CO2)
18
People eat the food thatplants make
Apples, potatoes, lettuce, celery, and beans are all plant foods
that people eat
19
Without solar energy,people would not have any
plants to eat
20
Some animals also eat plants
Animals eat other animals thateat plants
21
Without plants,animals could not live
There would be no animals for people to eat
22
You would not havechicken or hamburgers
or fish to eat
You would not have the things that
animals produce,such as milk, eggs or wool
23
People and animals are warmed by the heat
of the sun
24
When it is cold, people use fuelssuch as coal and oil to heat their
homes.
These fuels are made by solar energy
25
Coal and oilwere formed from plants and
animalsthat lived millions of years ago
When the plants and animals died,
their bodies became part of theEarth
26
The energy from these dead plants and animals
became chemical energyin coal and oil
27
When coal and oil are burned,the stored chemical energy
becomes heat energy