Lesson 1
Particles and Matter
Lesson 2
Liquids and Gases
Lesson 3
Gravity
Lesson 4
Simple Machines
Lesson 5
Heat Energy
100

Everything is made of _________.

Particles 

100

When water _______ heat energy it turns into ice

loses

100

___________ pulls on particles, so things with more particles have more weight.

Gravity

100

_______ are tools that make it easier for people to do work.

Simple machines

100

Most heat energy on Earth come from ________.

the sun

200

_______ is how many particles are in something.

Mass

200

If ice _____ heat energy it turns into water

gains

200

The Earth has a lot of gravity because it is so _______.

big

200

A pulley changes a down pull into _______.

an up pull

200

Matter can ________ if we add or remove heat energy.

change forms

300

________ is how much space something takes up.

Volume

300

If we quickly add a lot of heat to water, it will ____.

boil

300

When two things rub together they make _____.

friction

300

The balance point of a lever is called _____

fulcrum

300

Heat energy moves easily through some kinds of matter.  These materials are called ______.

conductors.

400

_______ is how close together the particles are.

Density

400

All liquids can turn into _______.

vapor

400

Rubbing a _____ surface has less friction than rubbing a _____ surface.

smooth :  rough

400

What kind of machine is a pencil sharpener?

A wheel and axel
400

We can malke heat energy by burning ____ like ____,____, and _____.

fuels : wood, coal, and oil

500

Are you more or less dense than a rock?

I am less dense than a rock.

500

Where do water droplets on the side of a cold glass come from? Why?

The drops come from water in the air. The water condenses because it touches the cold surface.

500

Why do objects have weight?

Objects have weight because gravity pulls on their particles.

500

How are pulleys and levers the same?

They make it easier to lift things.

500

When are good heat insulators important?

It is hard for heat energy to move through these materials.

Winter