Shadow size: plan | Science | Quizalize & Oak National Academy

Starter quiz

What happens when light falls on some objects?
- A dark shape is formed between the light source and the object.
- A dark shape is formed on the other side of the light source.
- A dark shape is formed on the other side of the object. ✓
What is a shadow?
- A dark shape that is formed when an object blocks light. ✓
- A dark shape that is formed when an object blocks heat.
- A dark shape that is formed when an object blocks water.
Which of these statements is correct?
- Opaque materials allow all light to pass through them.
- Opaque materials allow some light to pass through them.
- Opaque materials do not allow light to pass through them. ✓
What is a light source?
- A light source is something that produces its own food.
- A light source is something that produces its own light. ✓
- A light source is something that produces its own heat.
The shape of a shadow depends on the ______ of the object.
- 'shape' ✓
Which of these images shows the shadow of a mug?
- image 1
- image 2 ✓
- image 3

How are shadows formed?
- Shadows are formed when water is blocked by an object.
- Shadows are formed when light is blocked by an object. ✓
- Shadows are formed when heat is blocked by an object.
Which of these is a light source?
- the Sun ✓
- the Moon
- a mirror
- a torch ✓
True or false? The size of a shadow does not change.
- True
- False ✓
The size of a shadow changes depending on ...
- the brightness of the light source.
- the distance of the object from the light source. ✓
- the size of the light source.
Why do scientists plan investigations?
- to test things
- to record results
- to answer questions ✓
A fair test investigation ...
- involves changing one thing and measuring another. ✓
- involves changing lots of things.
- involves keeping everything the same.

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Shadows are formed when the light from a light source is blocked by an object.
The size of a shadow changes depending on the distance of an object from the light source.
Scientists ask questions and then plan how to carry out the right type of investigation to find answers.
A fair test investigation is when only one thing is changed and another is measured. All other things are kept the same.

The size of a shadow does not change.

Explanation of how the size of shadows can be changed.

Shadow - A shadow is a dark shape that is formed when an object blocks a source of light.
Light source - Something that is a light source produces its own light.
Object - An object is something you can touch but something that is not usually a living thing.
Distance - Distance is how far away something is or how far an object has travelled.