These cards are for the OCR 21st Century Science Course and are complete. :-)
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What is the Universe?

Name our galaxy.

Name the four layers of earth, in order, with their state (eg liquid).

What are comets?

What is the process that creates light in the sun and how does it work?

How fast is the speed of light?

What is a light year?

Describe the parallax method.

Describe the brightness method.

How do we know the universe is expanding?

Explain (briefly) the big bang?

In 1965, two radio engineers found an annoying hiss in their equipment. What was this hiss?

Is the expansion of the Universe slowing down, staying the same or speeding up?

What is the rock cycle?

What is deep time?

What was Wegener's theory, and what was the two pieces of evidence for it?

What's an oceanic ridge?

Why are there stripe patterns either side of an oceanic ridge?

What are tectonic plates and what do they cause?

What are P-waves?

What are S-waves?

What are transverse and longitudinal waves?

What is amplitude and wavelength?

What is frequency in a wave?

What is wave speed?

How do you calculate wave speed?

How do P-waves and S-waves prove that the outer core is liquid?