End of Unit 1 Assessment

When evaluating how magnets interact with each other, how will two of the same magnetic poles behave? (8-PS2-5)

• Two of the same poles will repel each other
• Two of the same poles will attract each other
• Two of the same poles will not result in any specific behavior between magnets
• Magnets do not have poles

"A ball is rolling straight across the floor until Bradley kicks it" is an example of which law? (8-PS2-1)

• Newton's First Law
• Newton's Second Law
• Newton's Third Law

A bowling ball and a baseball both roll across your foot at the same speed. The bowling ball hurts much more. This applies to which of Newton's Laws? (8-PS2-1)

• Newton's First Law
• Newton's Second Law
• Newton's Third Law

When riding the bumper cars at the fair, you bump into your friend and your car bounces backwards. Which of Newton's Laws does this apply to? (8-PS2-1)

• Newton's First Law
• Newton's Second Law
• Newton's Third Law

A bottle rocket that experiences a 500 N force to the right and a 300 N of air resistance to the left will: (8-PS2-2)

• Accelerate to the right
• Accelerate to the left
• Not accelerate

While studying Newton's laws of motion, Margie and her lab partner were tasked with determining the relationship between mass and force. They placed four different masses on a table and pulled them using a spring scale. The following data table shows the different masses used in the experiment and the force required to pull each mass. Based on this information, what would your conclusion be? (8-PS2-2) Mass (kg) Force (N) 5 25 10 50 15 75 20 100

• No clear relation can be observed between mass and force from the data.
• There is a direct proportion between the mass and force listed in the table.
• There is an inverse proportion between the mass and force listed in the table.

When a person jumps horizontally off of the end of an unanchored boat in a lake, the person goes forward and the boat goes backward. This is an example of: (8-PS2-1)

• Newton's First Law of Motion
• Newton's Second Law of Motion
• Newton's Third Law of Motion

Which of the following statements is correct based on the data you see in the chart below: (8-PS2-3) Wraps of wire around an Strength of Electromagnet iron nail connected to a (mV/M): 1.5V battery: 8 3mV/m 12 4mV/m 16 5mV/m 20 6mV/m

• The more wraps of wire around the nail makes a stronger electromaget.
• The more wraps of wire around the nail makes a weaker electromagnet.
• The number of wraps of wire around the nail does not have an effect on the strength of the electromaget.

Sara and Greg built an electromagnet in science class. They wrapped 50 turns of copper wire around an iron nail and hooked the ends of the wire to a 1.5 volt battery. They picked up 15 paper clips with their electromagnet, but they want to make it stronger. What should they do? (8-PS2-3)

• Wrap more turns of wire around the nail.
• Decrease the battery size.
• Use a nail with a plastic coating.

Donna is attempting to make an electromagnet to pick up old nails in and around her driveway. Which of these materials would be best for the core in order to make the strongest electromagnet to pick up the most nails? (8-PS2-5)

• A wooden stake
• An iron nail
• Water