What is the extension of the spring?

• 12cm

• 10cm

• 12mm

• 10mm

Why is adjusting the ruler important?

• To reduce the error in measuring the extension of the spring

• To stop it falling over

• Because it looks better

• Because otherwise Hooke's Law will be broken

What range of weights did the student use?

• 5N

• 0 - 6N

• 1 - 6N

• 0N

What can you conclude from Figure 4 about the deformation of the spring?

• The spring is broken

• It's not a spring, it's a slinky

• The spring has been inelastically deformed

• The spring has gone past it's limit of proportionality

What name is given to this effect?

• Bed-Shift

• Dead Shift

• Red Shift

• Bread Shift

What relationship between the speed of a galaxy and the distance is suggested by Hubble’s results?

• the further away from the Earth, the more people getting 9's in their GCSEs

• the further away from the Earth, the slower a galaxy is moving

• the further away from the Earth, the faster a galaxy is moving

• the further away from the Earth, the faster the sun is moving

Give one strength of this model in representing the idea of an expanding Universe.

• the persons face represents the big bang

• as the balloon expands the dots get further apart, representing the galaxies moving apart

• the balloon will eventually pop, showing a supernova

• dots are only on the surface of the balloon, galaxies are throughout the universe

Give one weakness of this model in representing the idea of an expanding Universe.

• there is a limit to how far the balloon can expand

• as the balloon expands the dots get further apart, representing the galaxies moving apart

• dots are only on the surface of the balloon, galaxies are throughout the universe

• balloons are expensive

In what way do the observations made by Hubble support both Theory 1 and Theory 2?

• both theories suggest that the earth is getting slower

• both theories suggest that red shift is moving the galaxies

• both theories suggest that the Universe is expanding

• both theories suggest that the Universe is slowing down

Most scientists now believe that Theory 2 is correct. Suggest what is likely to have caused scientists to start thinking Theory 1 is wrong

• the discovery of red-shift

• scientists were stuck in their ways

• new evidence / observations that cannot be explained by Theory 1

• both theories were proved wrong