Science Unit 2 Review

Front

What type of motion has a predictable or repeating pattern?

Back

Cyclic motion.

Front

What type of force must act on an object to change its motion?

Back

Unbalanced force.

Front

What are the two types of forces that can act on an object?

Back

Balanced and unbalanced forces.

Front

True or False: A 50kg man will have the same weight on Earth as he does on the moon.

Back

False.

Front

What is the attractive force that pulls objects towards the center of the Earth?

Back

Gravity.

Front

What is balanced force?

Back

Forces that are equal in size and opposite in direction, resulting in no change in motion.

Front

What is unbalanced force?

Back

Forces that are not equal and can cause an object to move or change its motion.

Front

What is friction?

Back

A force that opposes motion between two surfaces in contact.

Front

What is air resistance?

Back

A type of friction that acts on objects as they move through the air.

Front

How does gravity affect weight on different planets?

Back

Weight varies depending on the gravitational pull of the planet.