Title: 4th Grade Chapter 9 Test
14th Grade Chapter 9 Test
2A(n) ________ is an object that attracts certain
metals, mainly iron.
3An object that keeps its magnetism for a long
time is a(n)__________.
4A(n) _________ loses its magnetism after a short
time.
5The areas on a magnet where the force of a magnet
is greatest are called the ___________.
6The space in which the force of a magnet can act
is called its _________.
7A(n) ________ is an instrument that senses
magnetic north.
8A(n) _________ is a display of lights in the sky,
near Earth's poles.
9A strong temporary magnet that uses electricity
to produce magnetism is a(n) ________.
10A(n) _________ is a device that uses magnetism to
convert energy of motion into electrical energy.
11A(n) ________ is a device that changes electrical
energy to energy of motion.
12Where is the magnetic force strongest in this
magnet?
- At the poles
- At the top of the curve
- At the north pole
- At the south pole
13What will happen if these magnets are moved
together?
- They will attract each other
- They will repel each other
- They will rotate
- They will point north
14What energy change occurs in a generator?
- Electrical energy to motion
- Electrical energy to heat energy
- Heat energy to motion
- Motion to electrical energy
15How is a permanent magnet different than an
electromagnet?
- It attracts materials made from iron
- It has poles
- It has a magnetic field
- It cant be turned on and off
16In a furnace chemical energy is changed into
- Electrical energy
- Heat energy
- Nuclear energy
- Potential energy
17What is an electromagnet?
- Static electricity
- A compass needle
- Electricity produced by a magnet
- A magnet produced by electricity
18What happens when something is transformed?
- It moves across a boundary
- It gets created
- It changes its form
- It disappears
19When you turn on a light in your home, electrical
energy changes into
- Heat energy
- Chemical energy and heat energy
- Light energy and heat energy
- Light energy
20What do you call the parts of bar magnets that
attract paper clips?
- The center
- The poles
- Equator
- The force
21How can you increase the strength of an
electromagnet?
- Add more magnetic material
- Add more paper clips
- Take away some magnetic material
- Add more batteries
22An electric motor changes electric energy into
- Light energy
- Nuclear energy
- Chemical energy
- motion
23What is a generator?
- A device that uses electric energy to make things
cold - A device that converts the energy in falling
water into motion - A device that converts electrical energy into
motion - A device that converts motion into electrical
energy