Earth's Magnetic Field

Both Earth and a bar magnet have a _________ field with north and south poles.

• Geographic

• Atmospheric

• Magnetic

• Electric

Tags

NGSS.MS-PS2-3

Colby decided to make a compass. He rubbed a needle 100 times with a magnet. Then he hung the needle on a thread. What will happen?

• The needle would turn until one end pointed down.

• The needle would turn until one end pointed north.

• The needle would spin around and never stop.

• The needle would point in no certain direction.

Tags

NGSS.MS-PS2-5

What is true of magnetic substances?

• They can move iron objects without touching them.

• They can give a shock when you touch them.

• They fall faster when you drop them.

• They are always black and cold to touch.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

what is the earths magnetic field useful for 

• deflecting the solar wind, charged particles that come from the Sun.

• wind

• sun

• light

Why does a compass needle point north?

• The compass is a bar magnet

• Because north is up

• Because it's magic

• It lines up with the Earth's magnetic field

The area of magnetic force around a magnet is known as its _____________.

• magnetic field

• magnetic declination

• magnetic fan lines

• magnetic tan lines

Tags

NGSS.MS-PS2-3

A ________ is a device that has a magnet on a needle that spins freely. It is used for navigation because its needle usually points north.

• calculator

• ruler

• compass

• map

What is the primary cause of Earth's magnetic field?

• The rotation of the Earth

• The movement of molten iron in the Earth's outer core

• The gravitational pull of the Moon

• The Earth's atmosphere

Which instrument is used to measure the Earth's magnetic field?

• Thermometer

• Barometer

• Magnetometer

• Seismometer

How does the Earth's magnetic field protect the planet?

• By blocking harmful ultraviolet rays

• By deflecting charged particles from the solar wind

• By maintaining the Earth's temperature

• By stabilizing the Earth's orbit