Simple Machines
Inventions and Pollution
Gravity
Forces
Random
100

Draw a wheel on the blackboard.

(Draw a wheel!)

100

In class, we talked about three inventions that changed over time. What were they?

The phone, the car, and the boat.

100

True or false: gravity is an invisible force.

True!

100

True or false: gravity is a non-contact force.

True!

100

What type of fruit hit Isaac Newton's head when he discovered gravity?

An apple.

200

Draw an inclined plane on the blackboard.

Draw that inclined plane!!

200

A big factory creates a lot of smoke. The clouds near the factory are grey, not white. What type of pollution does the factory create?

Air pollution

200

True or false: gravity ONLY pulls things to the centre of the Earth. Gravity doesn't pull things towards the Sun or the Moon.

False!

200

When my friend passes me a ball and I kick it, the ball: 

a) stops moving 

b) changes direction 

c) starts moving

b) changes direction

200

Using simple machines requires:

a) more effort

b) less effort

b) less effort

300

True or false: when you pull down on the road of a pulley, the load goes down.

False! It goes up.

300

Name three inventions that changed over time. These three inventions CANNOT be the phone, the car, or the boat.

Correct answers include:

computer

toilet

television

radio

bicycle

etc.

300

Who discovered gravity?

The scientist Isaac Newton.

300

True or false: magnetism is a contact force.

False!

300
Pick two students to stand in from of the class. Demonstrate "push" and "pull."

Well done!

400

Describe a lever. In English!

A lever has two parts: a fulcrum and a rigid bar. You can place the load on one end and push on the other.

400

There's a big factory next to Caroline's house. It produces cars. The machines that make cars work all night, and it's hard for Caroline to sleep because she can hear them. What kind of pollution is this?

Noise pollution

400

Is gravity stronger on the Earth or on the Moon?

On the Moon.

400

When my friend throws me a basketball and I catch it, the ball: 

a) stops moving

b) changes direction 

c) starts moving

a) stops moving

400

Can using machines have negative effects? Why or why not?

Yes, it can because they can create many types of pollution.

500

Finish the sentence. A wheel is a circular object that turns around a central a _ _ _.

Axle

500

A company that makes chairs needs lots of wood. They take the wood from a forest, and there are no trees left. What is this called?

Deforestation!

500

Is gravity stronger on the Earth or on Jupiter?

On Jupiter.

500

If you apply a big force to a piece of paper, does it change shape or does it recover their original shape?

It changes shape.

500

Name three simple machines and three complex machines.

Simple machines:

pulley

wheel

inclined plane

lever

Complex machines:

cars

computers

phones

lightbulbs

etc.

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