Incorrect questions- paper 2

Question 1

Describe what happens when two like poles on a magnet are brought close together?

Answer 1

-they will repel
-force exerted

Question 2

How does a magnetic compass work?

Answer 2

-small bar magnet
-points in the direction of the earths magnetic field

Question 3

Seismic waves can be used to study parts of the Earth we cannot visit.
Suggest how these waves could give us information about the Earth’s core.

Answer 3

-waves are altered by density or solid sate waves can be refracted
-waves can be reflected by change in speed

Question 4

Seat belts can be used to keep occupants of cars safe in the event of an accident. Explain how?

Answer 4

1. Car and a passenger same speed
   2.brakes stop car passenger keeps moving
   3.objects remain in motion unless acted upon an external force
   4.seatbelts is needed to stop the person movement passenger forward

Question 5

Compare the properties of radio waves and gamma rays?

Answer 5

+transverse wave both
+travel same speed in a vacuum
-radio waves low frequency gamma is high
-gamma short wave length and long wave lengths

Question 6

Describe the formation of an image through convex lens?

Answer 6

-virtual or real image
-parrel light rays
-focus at principle focus

Question 7

When is something balanced?

Answer 7

-total clockwise moment about the pivot is equal to the total anti-clockwise moment

Question 8

Describe the speed and velocity of an object that is orbiting the Earth.
You do not need to give any values.

Answer 8

-constant speed
-changing velocity as direction is changing

Question 9

Describe how visible light can be scattered?

Answer 9

-reflection
-rough surfaces

Question 10

Our sun is a second-generation star.
Explain how we know this.

Answer 10

-heavy elements are present
-heavy elements are only made during super novas
-fusion occurs inside star

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Question 16

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Magnetic field changes around coil

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