IA4 Review

Electric charges that are alike _______ each other.

• Attract
• Repel

Tags

NGSS.MS-PS2-5

Electric charges that are different _______ each other.

• Attract
• Repel

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

To complete a circuit the switch must be

• unattached
• open
• closed

Tags

NGSS.4-PS3-2

The science class decides to build an electromagnet. They wrap a strand of wire around a large iron nail three times, and connect the wire to a battery. The magnet is strong enough to lift a two pound metal plate.

The class wants to be able to lift a four pound plate with the electromagnet. What should they do?

• Wrap an even larger nail in three coils of wire.

• Wrap the nail with wire six times, not three.

• Wrap the nail with only one coil of wire.

• Try using a smaller battery.

A huge, jagged rock sits atop a windy cliffside.

Over a period of many years, how will the rock MOST LIKELY change?

• It will become larger and smoother.

• It will become smaller and smoother.

• It will become bigger and less smooth.

• It will become smaller and less smooth.

Stone Mountain, found in North Georgia, has a unique history. It was formed of magma that hardened underground. This formation is called a pluton. Over millions of years a few processes caused the pluton to be exposed. First, it was pushed up by __________ that built the Blue Ridge Mountains. Then the rock was exposed by earthquake action and erosion.

• earthquakes

• faults

• landslides

• volcanoes

The flat area surrounding the mouth of the Mississippi River is covered with rich sediments important to farming in this area. These sediments are deposited at a rate of 80,000 tons per year. This area surrounding Mississippi River is called the

• delta

• plains

• plateau

• low lands

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 magnet will pick up items that can't be picked up by an electromagnet.

• an electromagnet will pick up items that can't be picked up by an magnet.

• electromagnets have a set strength, while the strength of a magnet can be adjusted.

• magnets have a set strength, while the strength of an electromagnet can be adjusted.

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?

• magic

• wind currents

• static electricity

• current electricity

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?

• NO, copper is a good conductor.

• NO, copper is a good insulator.

• YES, copper is a good conductor.

• YES, copper is a good insulator.