Unit 2 Quiz Review

2.1.1

Match the following terms with a good description of them

• Hypothesis

• An observable and measurable truth.

• Fact

• A description of what effect will happen because of a given cause

• Theory

• An explanation of why observed patterns happen

• Law

• A prediction based on past evidence and experimentation

Answer explanation

This question links to success criteria 2.1.1: I can differentiate between a hypothesis, theory and law and understand the importance of each.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

2.1.1

Match the following ideas with why they are important to science

• Law

• By learning this we can connect observed cause and effect relationships to bigger ideas and predict outcomes from similar events.

• Fact

• By observing this we gain the information we need to ask good questions and test our ideas.

• Hypothesis

• By forming this we gain a starting point to conduct an experiment and learn more.

• Theory

• By using this we can reliably predict the outcome to specific events.

Answer explanation

This question links to success criteria 2.1.1: I can differentiate between a hypothesis, theory and law and understand the importance of each.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

2.1.2

Is there an outside force acting to create the motion you see in the animation?

• The object's speed does not change, so there is no force

• The direction the object moves is changing, there must be an outside force.

• The center of the object doesn't move, so there is no outside force.

• The object is above the ground, there is a downward force.

Answer explanation

This question links to success criteria 2.1.2: I can determine whether an outside net force is acting upon an object based on its motion.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

2.1.2

Which statement best summarizes the scientific concept shown in the cartoon?

• A falling body accelerates at a constant speed.

• The motion of an object is constantly changing due to magnetic forces.

• The force of friction causes an object in motion to move faster.

• A body in motion will remain in motion unless influenced by an outside force.

Answer explanation

This question links to success criteria 2.1.2: I can determine whether an outside net force is acting upon an object based on its motion.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

2.2.2

Watch as Blake begins to run. What happens to the sheets of paper under his feet? Why?

Mira como Blake comienza a correr. ¿Qué pasa con las hojas de papel bajo sus pies? ¿Por qué?

• Blake runs so fast that the paper appears to move backwards but actually stays still

• When Blake moves forward, the air moved into the space he had been and pushes the paper around.

• When Blake pushes backwards on the paper the paper pushes forward on him. The paper moves backward and Blake moves forward.

• Newton was wrong.

Answer explanation

This question links to success criteria 2.2.2: I can use Newton’s 3rd Law to explain how common motion examples work.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

2.2.2

When you jump up, you push the earth downwards. Why does this cause you to move upwards?

• You don't move upwards, you stay where you are and push the earth down. The earth isn't standing on anything so it easily moves.

• The question is wrong because you can't push the earth downwards. To jump you pull yourself upwards.

• Don't overthink it. it just works.

• When you push down on the earth it pushes back up on you. The upward force of the earth in reaction to your downward push makes you move up.

Answer explanation

This question links to success criteria 2.2.2: I can use Newton’s 3rd Law to explain how common motion examples work.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

2.2.1

A player throws a ball. Which of the following correctly describes the applied and reaction forces?

• The player pushing on the ball is the applied force. The ball pushing on the player is the reaction force.

• The ball pushing on the player is the applied force. The player pushing back on the ball is the reaction force.

• The player's hand moving is the applied force. The ball moving is the reaction force.

• The player pushing on the ball is the applied force. The wind pushing on the ball is the reaction force.

Answer explanation

This question links to success criteria 2.2.1: I can identify action and reaction forces.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

2.2.3

When a bug hits a car's windshield the bug goes splat but the car does not. If the forces on them are equal, why does this happen?

• The car is bigger so all of the force hits the bug and none hits the car

• The force on the bug is larger because the car is larger

• Bugs can go splat from a much smaller force so equal force splats the bug and not the car

• Newton was wrong

Answer explanation

This question links to success criteria 2.2.3: I can identify why the same force can have differing effects on different objects.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

2.3.1

Which of the following best describes how Newton's second law predicts what will happen to the acceleration of an object when the mass of an object increases?

• If the mass increases the object will accelerate more.

• If the mass increases the object's acceleration will not change.

• The acceleration should decrease when the mass increases

• If the mass increases, the force increases as well.

Answer explanation

This question links to success criteria 2.3.1: I can describe the relationship between net force, mass and acceleration.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

HS-PS2-A-1

2.3.1

Which of the following mathematically describe Newton's Second Law? There can be more than one correct option.

Answer explanation

This question links to success criteria 2.3.1: I can describe the relationship between net force, mass and acceleration.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Tags

HS-PS2-A-1