Force Basics
Buoyancy and Friction
Gravity and Magnetic Force
Muscular Force and Static Electricity
Contact/Non-Contact Forces, Erosion, and Safety Devices

### 100

A force is defined as a ________ or a _______.

push or a pull

### 100

Does buoyancy always push upwards or downwards?

Upwards

### 100

Snow falling is an example of what force...

Gravity

### 100

When our body uses pushes or pulls to move objects, we are using this type of force.

Muscular force

### 100

Pushing a toy car is an example of a _________ force and magnets repelling is an example of a _________ force.

contact and non-contact

### 200

Give an example of a push

Kicking a soccer ball

### 200

Friction is created when two surfaces _________________

rub against each other

### 200

Why are people lighter on the moon than they are on Earth?

The force of gravity is stronger on Earth than on the moon.

### 200

When you rub a balloon in your hair and try to stick it to the wall, why does it stick?

Rubbing it in your hair caused it to have static electricity.

### 200

What is one positive thing and one negative thing about wearing helmets

Prevents injuries, expensive

### 300

Give an example of a pull

Pulling a chair out from the table

### 300

Does friction make objects speed up or slow down?

Slow down

### 300

When two magnets stick together, we say that there is an _______________.

attraction

### 300

What happens when you decrease the amount of force you are using to throw a ball with?

The ball will travel slower and not go as far.

### 300

What are two positive and two negative things about wearing seatbelts.

### 400

Name the 6 forces studied this term,

Buoyancy, magnetic force, muscular force, friction, gravity, and static electricity

### 400

How much friction will two rough surfaces rubbing together cause?

A lot of friction

### 400

What happens when the north pole of one magnet is facing the north pole of another magnet?

The magnets will repel

### 400

Name one action that uses very little muscular force and one action that uses a lot of muscular force.

### 400

What causes soil erosion?

### 500

Give an example of something that uses both a push and a pull

Door

### 500

When a ping pong ball is placed underwater, why does the water level rise?

The ping pong ball is taking up space in the water, so the water has to go somewhere.

### 500

If a pencil and a textbook are dropped from the same height at the same time, which one will hit the ground first and why?

The textbook because it is heavier

### 500

What is static electricity?

A pushing or pulling force that is caused by a difference in charged particles.

### 500

What can be done to prevent soil erosion?