Question

is any one able to help me with these questions

9)
Magnets and electromagnets can both be used to pick up metal items like iron nails.

Even though they are similar, there are differences between magnets and electromagnets.

An example of one of these differences is that
A) a magnet will pick up items that can't be picked up by an electromagnet.
B) an electromagnet will pick up items that can't be picked up by an magnet.
C) electromagnets have a set strength, while the strength of a magnet can be adjusted.
D) magnets have a set strength, while the strength of an electromagnet can be adjusted.
10)
Mrs. Adams class decides to try an experiment. She rubs a blown up balloon on Sandy's head. After this, she takes the balloon and places it on the side of the wall, where it sticks, instead of falling to the ground. Also, Sandy's hair is now sticking almost straight out.

What causes Sandy's hair to act this way?
A) magic
B) wind currents
C) static electricity
D) current electricity
11)
Your science class builds a circuit by connecting a light bulb and a battery. The class connects these items with copper wire.

Is the choice to use copper wire a good choice?
A) No, copper is a good conductor.
B) No, copper is a good insulator.
C) Yes, copper is a good conductor.
D) Yes, copper is a good insulator.
12)
Your science class builds a circuit by connecting a light bulb and a battery. The class connects these items with copper wire.

The wire has a plastic covering, like an electrical cord.

Why is having this plastic cover on the wire a good idea?
A) It keeps the metal wire from scratching anything.
B) It is useful when coiling up the wire for storage.
C) It is a conductor that will protect you from getting shocked.
D) It is an insulator that will protect you from getting shocked.
13)



Small islands can form during the constructive process called
A) erosion.
B) glaciation.
C) deposition.
D) weathering.
14)
Protecting topsoil from erosion is important to farmers. All BUT ONE is a way to prevent soil erosion. That is
A) contour plowing.
B) terrace farming.
C) soil reclamation.
D) planting cover crops.
15)
Sandbags are piled along the banks of the rising Flint River to form a
A) temporary dam.
B) permanent dam.
C) temporary levee.
D) permanent levee.

16)

The wires connecting the switches, light-bulbs and buzzers must start and end at the power source before the circuit can work. The power source could be a
A) battery.
B) light-bulb.
C) switch.
D) wire.

Answer 1

Ans 10.Static energy

Ans 11.Yes copper is a good conductor

Answer 2

Answer:

Explanation:

idk i need help on that one 2