Lesson 1 Ks3 Recap

10b1

Radiation and the Universe

Aims: • to assess our KS3 knowledge of the solar system • to explain how we can use different forms of radiation to communicate

Keywords: spectrum, radiation, communication

The Solar System a) Which of the following objects do not produce their own light? Earth

✓

Jupiter

✓

Moon

✓

Pole star

(3)

The Solar System b) Put the objects below in order of increasing distance from the Sun. Earth

Earth

Jupiter

Moon at full moon

Moon at full moon

Jupiter

Pole star

Pole star (3)

The Solar System c)

Complete the sentences below using words from the list. moon

star

planet

i)

star A _____________ gives out its own light.

ii)

planet A ______________ orbits the Sun.

iii)

moon A ______________ orbits a planet.

planet/moon iv) A ______________ reflects light from the Sun.

v)

star A distant ______________ outside the Solar planet System might have a ______________ in orbit round it.

Light a) Complete the list below showing the colours of the spectrum. Red Orange ______ Yellow _____ Green Blue Indigo _____ Violet (3)

Light b) The diagram below shows a red filter in the path of a beam of white light.

i)

What colour is the light from the beam that passes through the filter? red

Light iii) What would you see if a blue filter was placed as below, next to the red filter on the other side of the white light beam? What would you see if a blue filter was placed as below, next to the red filter on the other side of the white light beam?

Red light would emerge from the red filter but would be stopped by the blue filter. So no light would pass through the blue filter.

Gravity In the diagram below, objects A and B represent two objects in space. A is orbiting B. b)

Complete the sentences using words from the list below. equal to

greater than

weaker than

If the distance between A and B became larger, the force of gravity on A would be _________ the force of gravity on it before.

weaker than

Gravity In the diagram below, objects A and B represent two objects in space. c)

Complete the sentences using words from the list below. equal to

greater than

weaker than

If the mass of A was made smaller, the force of gravity on it would be __________ weaker than the force of gravity on it before the change.

Gravity In the diagram below, objects A and B represent two objects in space. d)

Which object in the diagram has the greater mass? B (1) __

10b1

Radiation and the Universe

Aims: • to assess our KS3 knowledge of the solar system • to explain how we can use different forms of radiation to communicate

Keywords:

spectrum, radiation, communication