Fun with Forces and Machines

Fun with Forces and Machines

pp. 32-44

move

to go from one place or position to another

force

a push or pull

Fun with Forces

• Some toys are indoor toys and some are outdoor toys.

• You can play in water with some toys.

• Some toys need are to make them work.

• Toys are nonliving. They cannot breathe or move on their own.

• Water, air, wind, and magnets are forces that can make toys fun!

Multiple Choice

Toys can move on their own.

• True

• False

Multiple Choice

Toys are

• Nonliving

• Living

Multiple Choice

What is force?

• a push

• a pull

• a push or a pull

Water and Air

• Water toys float on air because they are lighter than water.

• The water pushes the toys to the top.

• If water is moving, it pulls the toy along.

• Air is in toys like balloons, balls, and bubbles.

• Air pushes the bottom of toys to keep them in the air and the sides for some toys to float or bounce.

gravity

a force that pulls things to the ground

together

with each other

create

to make

opposites

when something is different from something else

Wind

• Wind is air that moves

• The wind keeps a kite in the air.

• The wind stops blowing, gravity pulls the kite to the ground.

• The wind blows a pinwheel.

• If the wind is blowing hard, it makes it move faster.

• The wind blows against the sails on a sailboat to make the boat move.

Multiple Choice

What force pulls a kite to the ground

• gravity

• wind

• air

Multiple Choice

Which would take more strength to lift?

• a box full of toys

• an empty box

Working Together

• Some forces work together to make a toy more fun.

• Air fills a ball. Water makes it float.

• Air fills bubbles. The wind carries them away.

• Air, wind, and water work together just like people do.

magnets

a piece of material that is able to attract certain metals

travel

to move from one place to another

easy

not hard to do

modeling

the act or activity of making a small copy of something

Magnets and Machines

• Magnets pull on things made of iron or steel.

• Machines are tools that make work easier and faster.

• Wheels help things move faster because there is less rubbing.

• Ramps help things move up or down faster.

• Levers make moving heavy things easier.

Multiple Choice

How do we make things with wheels move?

• kicking

• pushing or pulling

Multiple Choice

A tool that makes work easier is a

• machine

• magnet

• gravity

Multiple Choice

Which one is not a machine?

• lever

• gravity

• wheel