Energy & Matter Mid-Unit Assessment Miller

1. Which type of force opposes motion between two objects?

• gravity
• friction
• magnetic
• electric

2. Which two factors effect gravity? (Select both)

• mass
• volume
• density
• distance

3. What is the force between charged objects?

• friction
• gravity
• electric
• magnetic

4. Which of the following is an example of balanced forces?

• a football player being tackled
• pushing a grocery cart
• a set of books standing on a shelf
• hitting a tennis ball over a net

5. When forces are unbalanced, they cause _____________________.

• movement
• the object to remain still

6. A charge imbalance that results in the buildup of excess electric charge on an object is called _____________________________.

• static electricity
• current electricity
• circuit electricity
• static discharge

7. If an atom has more protons than electrons, the atom has a ______________ charge.

• positive
• negative
• neutral
• it can not be determined without knowing the atomic number

8. Two objects with like charges will __________ each other.

• attract
• repel
• neither attract nor repel

9. The area surrounding a charged object is called an _________________.

• area of attraction
• area of repulsion
• electric field
• gravitational field

10. A copper wire is covered with a plastic coating. The plastic coating protects people from the electric charge flowing through the wire. Which of the following is true?

• copper is a conductor and the plastic coating is an insulator
• copper is an insulator and the plastic coating is a conductor
• both the copper and the plastic are conductors
• both the copper and the plastic are insulators