Force and Motion Review

How can you find the difference between the snow fall on day 1 and day 2? Day 1 the snow was 6 inches on day two the snow was a total of 13 inches. How many inches of snow fell between day 1 and day 2?

• 7 inches
• 9 inches
• 4 inches
• 11 inches

In an investigation how many variables can be changed at once? 

• 2
• 3
• 1
• 4

1. Why do we test things several times in an investigation?

• To make the investigation longer
• To confuse investigators
• To ensure consistency, reliability, and accuracy of results, as well as to identify errors or inconsistencies.
• To waste time and resources

What is friction?

• Friction is the force that accelerates motion between two surfaces in contact.
• Friction is the force that resists motion between two surfaces in contact.
• Friction is the force that attracts two surfaces in contact.
• Friction is the force that causes surfaces to repel each other.

What is gravity?

• Gravity is the force by which a planet or other body draws objects toward its center.
• Gravity is the force that only affects objects on Earth.
• Gravity is the force that causes objects to float in space.
• Gravity is the force that pushes objects away from a planet's center.

How could you use friction and gravity to slow down a ball going down a ramp?

• Decrease the incline of the ramp and use smoother surfaces
• Remove obstacles and decrease friction
• Increase the incline of the ramp, add rough surfaces, and place obstacles to increase friction and slow down the ball.
• Increase the speed of the ball to counteract friction

What is the main force that causes a rolling object to slow down?

• Friction
• Inertia
• Gravity
• Magnetism

A force is any ___________ or ____________.

• twist or turn
• rise or fall
• stop or go
• push or pull

A compass always points________?

• north
• west
• east
• south

What force causes a compass to always point North? 

• Gravity
• Solar winds
• Electromagnetic interference
• Earth's magnetic field