Unit 4 Assessment Review

Which choice below shows a difference between gravitational fields, electrical fields, and magnetic fields?

• Gravitational fields are invisible, electrical and magnetic fields are visible.

• Gravitational fields can attract and repel, electrical and magnetic fields cannot.

• Gravitational fields involve positive and negative charges, electrical and magnetic fields involve poles.

• Gravitational fields can only attract, electrical and magnetic fields can both attract and repel.

Which poles would attract and which would repel on a magnet?

• North and south would attract, north and north would repel.

• North and north would attract, north and south would repel.

• South and north would attract, north and south would repel.

• South and south would attract, north and north would repel.

Which answer best describes this image?

• The positive charge is repelling the negative charge.
• The blue charged object will repel the negatively red charged object.
• The positively charged red object will be attracted to the negatively charged blue object.

Every magnet has a:

• East and West pole

• North and South pole

• East and South pole

• North and West pole

• Chicago and Saint pole

What will happen when these magnets are brought close together?

• They will attract each other.
• They will repel each other.
• Both magnets will turn to the left
• Both magnets will turn to the right

Magnets that are arranged like this will _______. 

• move away from each other (repel)
• move towards each other (attract)

Which is needed to determine the amount of gravitational force between two objects?

• distance and mass

• weight and time

• area and weight

This FORCE pulls things.  It PULLS things into orbit around the sun. 

• Newton
• gravity
• weight
• path

The SI units of force are measured in 

• Grams
• Newtons
• Pounds
• Kilograms

What effect does increasing the distance between the two objects do to the gravitational force?

• The distance between two objects has no effect on the gravitational force

• It increases

• It stays the same

• It decreases