Year 8 Light and Space Revision Quiz (8PL)

In what direction does gravity act?

• Toward the centre of the Earth

• Downwards

• In all directions all at once

What factors affect the size of the force of gravity between two objects?

• How close together the objects are

• The mass of the objects

• The weight of the objects

• The strength of a planet's magnetic field

Answer explanation

Objects with more mass will create a larger gravitational field (stronger force of attraction).

This field is strongest between objects that are closer together (e.g. the Earth and the Moon are closer than the Earth and the Sun)

Choose the statements you believe best describe what is happening in this diagram.

• The reflected ray is emitted from the Torch

• The observer can see the mirror because light is reflected towards their eye

• The incident ray is emitted from the torch

• This diagram shows the refraction of light

What do waves transfer?

• Energy

• Light

• Particles (matter)

• Sound particles

How many colours are there in white light?

• Seven

• Eight

• Six

• Nine

Which shows us the order of light in a rainbow, from least-to-most refracted (bent)

• Red Orange Yellow Green Blue Indigo Violet
  
  (Richard Of York Gave Battle In Vain)

• Violet Indigo Blue Green Yellow Orange Red
  
  (Violence In Buses Guarantees You Off-peak Returns)

• Red and yellow and pink and green
  Purple and orange and blue
  
  (Like in the song, 'Sing a Rainbow')

• Blue and Orange and Purple and Green and Pink and Yellow and Red
  
  (Like in the song, 'Sing a Rainbow' but backwards, 'cause it's actually wrong)

Using the image as a guide, which answer best describes why a
Leaf is green ?

• Leaves appear to be green because
  they absorb green light and reflect others

• Leaves appear to be green because they transmit all colours except green

• Leaves appear to be green because they reflect green light and transmit all other colours

• Leaves appear to be green because they reflect green light and absorb other colours of light.

If I wanted to warm my dinner up in the light of the sun, would I be better off:

• Putting it in a white box

• Putting it in a black box

• Putting it in a transparent (clear) box

• Putting it in a shiny silver box

Answer explanation

Black things absorb more light, allowing more heat energy to be taken into the box.

My only friend is a snowman - he lives in my (cold) house.

I don't want to be alone in the world again.

How can I make sure he doesn't melt?

• Paint my house white

• Paint my house black

• Paint my house red

• Paint my house blue

• Move into a house made of glass

Answer explanation

White can reflect more light
(that is why it is white, all colours are reflected).

If all light is reflected, no heat from the light will be absorbed.

Frosty Freddie lives on!

What is shown in the diagram above?

• Refraction

• Transmission

• Reflection

• Absorption