Lesson T5.3.2
T5.3.2 Earth's magnetism and compasses Quiz: KS3 Physics, Unit 5
20 questions
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Lesson T5.3.2, Earth's magnetism and compasses: 20 multiple choice questions for the KS3 Physics (National Curriculum), Unit 5: Electricity and magnetism, written with Revision Ninja.
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The 20 questions
-
Earth's magnetic field behaves most like the field of:
- A giant bar magnet
- A rotating electric fan
- A high-voltage power cable
- A large electric charge
-
What causes a compass needle to point roughly north?
- Gravity
- Earth's rotation
- Earth's magnetic field
- Solar radiation
-
Earth's geographic north pole lies close to which magnetic pole?
- Equator pole
- Magnetic south pole
- Geographic south pole
- Magnetic north pole
-
Why does a compass needle stop swinging and come to rest?
- Lines up with field
- Battery runs out
- Friction stops it
- Gravity pulls down
-
What is thought to produce Earth's magnetic field?
- Solid granite
- Molten iron
- Trapped gases
- Crustal magma
-
Which common activity depends directly on Earth's magnetism?
- Calculating speed
- Measuring temperature
- Navigation
- Weighing objects
-
What nearby material can disturb a compass reading by creating its own magnetic field?
- Copper wire
- Steel pipe
- Wooden beam
- Plastic tubing
-
Why does a compass near a strong bar magnet stop pointing north?
- Earth field stops
- Air resistance high
- Needle demagnetises
- Magnet field stronger
-
What protective benefit does Earth's magnetic field provide from the Sun?
- Deflects solar particles
- Blocks all heat
- Stops gravity leaks
- Absorbs visible light
-
Why does a magnetic compass still work reliably at night?
- Gravity is weaker
- Field is constant
- Moonlight powers it
- No wind at night
-
Which of these can a standard magnetic compass detect?
- Heavy mass
- A magnetic field
- An electric charge
- High temperature
-
Which best describes the needle inside a compass?
- A charged copper wire
- A fixed iron rod
- A free-turning small magnet
- A spinning glass disk
-
What is the primary use of a compass when paired with a map?
- Find north direction
- Measure distance
- Predict weather
- Calculate altitude
-
Which magnetic pole of Earth is located closest to the geographic south pole?
- Magnetic north pole
- Magnetic south pole
- Geographic north pole
- Equator
-
Which of these would NOT disturb a compass needle?
- A bar magnet
- A wooden table
- A nearby iron nail
- A steel key
-
What field determines the direction of a freely turning compass needle with no magnets nearby?
- Solar wind
- Electric field
- Earth's magnetic field
- Gravitational field
-
What does a freely moving compass needle align with?
- True north
- Geographic pole
- Magnetic field
- Gravitational pull
-
Which phenomenon is caused by solar particles interacting with Earth's magnetic field?
- Auroras
- Rainbows
- Solar eclipses
- Tides
-
What should you do if a compass behaves erratically near metal?
- Add more magnets
- Heat the metal
- Tap the glass
- Move away
-
What is the name of the part of a compass that turns to show direction?
- The base plate
- The needle
- The dial
- The glass cover
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