8th grade 2nd 9 weeks Study Guide

What is static electricity?

• movement
• electric charges
• chemical reactions
• thermal energy

When an object gains or loses electrical charges, what happens?

• they become charged
• they become neutral
• they produce energy
• they point north

When charges are moving through a material, such as a wire, they can also produce _______ energy, which makes the wire feel warm

• sound
• light
• heat
• color

Which of the following could best be classified as an insulator?

• metal
• penny
• water
• plastic

Which of the following could best be classified as a conductor?

• metal
• rubber
• wood
• plastic

What is the purpose of the plastic coating around electrical cords?

• prevents shock
• insulates the electricity
• keeping electricity on correct path
• all of the above

The electricity flows along a SINGLE pathway. If one light bulb goes out, it opens the circuit and all the lights will go out.

• series circuit
• parallel circuit
• open circuit
• closed circuit

The electricity flows along more than one pathway. If one light bulb goes out, the others will stay lit.

• series circuit
• parallel circuit
• open circuit
• closed circuit

How many poles do bar magnets have?

• 1
• 2
• 3
• 4

Where is the force of a magnet the strongest?

• in the middle
• north end
• south end
• at the poles