Science : 7

Which of the following is NOT an example of one of Newton's laws?

• →FBA=−→FBA

• Energy cannot be created nor destroyed.

• F=ma.

• An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an unbalanced force.

A scientist examined pollen grains in still water and realized they were moving. This was due to the constant collision of the grains with hundreds of particles, which caused the grains to move randomly. What was the name of this motion?

• Subatomic particle bombardment.

• Benford's law.

• Euclidian motion.

• Brownian motion.

Which of the following are laws in the particle theory of matter? Tick all that apply.

• Temperature affects the movement speed of particles.

• All atoms have the same mass.

• All matter is made up of particles.

• There are spaces in between particles.

How do gas particles move?

• Linearly.

• Randomly.

• Following the uncertainty principle from quantum mechanics.

• In a hyperbola - shaped trajectory.

Aluminum turning white due to oxidation.

What type of change is this?

• Physical change.

• Chemical change.

Dry ice subliming.

What type of change is this?

• Physical change.

• Chemical change.

Paper being cut with scissors.

What type of change is this?

• Physical change.

• Chemical change.

Burning wood in a campfire.

What type of change is this?

• Physical change.

• Chemical change.

Candle wax melting in the heat.

What type of change is this?

• Physical change.

• Chemical change.

Jet fuel igniting, propelling a rocket forwards.

What type of change is this?

• Physical change.

• Chemical change.