Light
25 Grade 4 Integrated Science questions on Light, with worked marking schemes. 25 questions are available on this topic in full.
Question 1
3 marksStudy the materials below: clear window glass, wooden door, frosted (rough) glass. Write each material next to the correct group: transparent, translucent or opaque.
(3 marks)
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1 markWhen a solid object is placed between a torch and a wall, a shadow forms on the wall. The shadow forms because the object
A. Makes its own light
B. Blocks the light from the torch
C. Adds more light
D. Reflects all the light
(1 mark)
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1 markWe can see objects because light
A. reflects off them into our eyes
B. travels from our brain
C. is always present everywhere
D. comes from our eyes to the object
(1 mark)
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1 markA material that does not allow light to pass through it at all is called
A. Translucent
B. Colourless
C. Transparent
D. Opaque
(1 mark)
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1 markWhich one of the following does NOT make its own light?
A. An electric bulb
B. The moon
C. A lit candle
D. The sun
(1 mark)
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1 markAn example of a source of artificial light is a
A. sun
B. moon
C. torch
D. stars
(1 mark)
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1 markWhy do we need light in the classroom during the day?
A. To make noise
B. To give us food
C. To help us see clearly
D. To keep the room warm
(1 mark)
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1 markA shadow is formed when an object blocks light. This shows that light travels
A. In curved paths
B. Backwards
C. In straight lines
D. In circles
(1 mark)
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1 markA shadow is formed when light is blocked by a
A. mirror
B. translucent object
C. opaque object
D. transparent object
(1 mark)
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3 marksState three ways in which light is useful to people in their daily lives.
(3 marks)
Marking scheme
Any three (1 mark each): helps us to see; helps plants to make food/grow; used for warmth from the sun; helps us read and work at night (from lamps/bulbs); helps us move about safely; used for drying clothes/food (sunlight).
Question 11
2 marksThe sun is very important to living things on Earth.
(a) Give one reason why the sun is important to people. (1 mark)
(b) Give one reason why the sun is important to plants. (1 mark)
(2 marks)
Marking scheme
(a) 1 mark: gives light to see; gives warmth/heat; helps dry clothes and food. (b) 1 mark: gives light that helps plants make their own food/grow.
Question 12
1 markThrough which of the following materials can light pass easily so that you can see clearly through it?
A. A brick wall
B. A wooden door
C. A metal sheet
D. A clear glass window
(1 mark)
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1 markA mirror reflects light. This means it
A. produces its own light
B. absorbs all light
C. bounces light off its surface
D. allows light to pass through
(1 mark)
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1 markWhich of the following gives light in a home at night?
A. A cupboard
B. A lit lamp
C. A blanket
D. A chair
(1 mark)
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1 markDuring a power blackout at night, a pupil used a certain object that makes its own light to read. Which of the following is an artificial (man-made) source of light?
A. Star
B. Sun
C. Torch
D. Moon
(1 mark)
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1 markWhich of the following is a natural source of light?
A. Candle
B. Electric bulb
C. Sun
D. Torch
(1 mark)
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1 markLight travels in
A. circles
B. zigzag lines
C. straight lines
D. curved lines
(1 mark)
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3 marksA pupil shone a torch onto a ball placed in front of a wall in a dark room. A dark shape appeared on the wall.
(a) Name the dark shape formed on the wall. (1 mark)
(b) Explain why the dark shape was formed. (2 marks)
(3 marks)
Marking scheme
(a) 1 mark: a shadow. (b) 2 marks: the ball is opaque and blocked/stopped the light from the torch (1 mark); light travels in straight lines and cannot pass through the ball, so a dark area forms behind it on the wall (1 mark).
Question 19
1 markWhen a pupil stood in the sun, a dark shape formed on the ground behind her. What is this dark shape called?
A. A cloud
B. A reflection
C. A rainbow
D. A shadow
(1 mark)
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1 markWhich of the following materials allows only a little light to pass through, so you cannot see clearly through it?
A. A stone
B. Clear glass
C. A wooden board
D. Tracing paper
(1 mark)
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2 marksWe must be careful when using some sources of light.
(a) State one danger of looking directly at the sun. (1 mark)
(b) State one safety rule to follow when using a candle at home. (1 mark)
(2 marks)
Marking scheme
(a) 1 mark: it can harm/damage the eyes. (b) 1 mark, any: keep it away from things that can burn/curtains; do not leave it burning unattended; put it in a firm holder; keep it away from young children; put it out before sleeping.
Question 22
4 marksMaterials behave differently when light shines on them.
(a) What name is given to a material that light passes through so you can see clearly, like clear glass? (1 mark)
(b) What name is given to a material that light cannot pass through at all, like wood? (1 mark)
(c) Give one more example of each type of material. (2 marks)
(4 marks)
Marking scheme
(a) 1 mark: transparent. (b) 1 mark: opaque. (c) 1 mark each: transparent example (clear water, clear plastic, clean glass window); opaque example (stone, metal, book, wooden door, brick).
Question 23
1 markWhich of the following is an example of an opaque material?
A. Water
B. Cardboard
C. Air
D. Clear glass
(1 mark)
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1 markThe main source of natural light is the
A. bulb
B. torch
C. candle
D. sun
(1 mark)
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3 marksSources of light can be grouped as natural or artificial (man-made).
(a) Give one example of a natural source of light. (1 mark)
(b) Give two examples of artificial sources of light. (2 marks)
(3 marks)
Marking scheme
(a) 1 mark: the sun (accept stars). (b) Any two (1 mark each): torch; electric bulb; candle; lamp/lantern; matchstick flame; car headlights.
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