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ScotlandPhysics

Area 2: Space

2 dot points across 2 inquiry questions. Click any dot point for a focused answer with worked past exam questions where available.

How do we use light from distant stars and galaxies to learn about the universe and its history?

Cosmology: using the electromagnetic spectrum and telescopes to study the universe, line spectra as a fingerprint of elements, and redshift as evidence that the universe is expanding.
An SQA National 5 Physics answer on cosmology, covering how the different bands of the electromagnetic spectrum and the telescopes that detect them are used to study the universe, how line spectra act as a fingerprint to identify elements in stars, and how the redshift of light from distant galaxies is evidence that the universe is expanding.
9 min answer →

How do rockets get into space, and what physics keeps a satellite in orbit?

Space exploration: rocket thrust and Newton's third law, weight and mass on different bodies, the use of satellites and the idea of a satellite as a projectile, and the risks and benefits of space travel including re-entry heating.
An SQA National 5 Physics answer on space exploration, covering how a rocket produces thrust using Newton's third law, how weight changes on different planets and moons while mass stays the same, the idea of a satellite as a projectile in continuous free fall, and the risks of space travel such as re-entry heating.
10 min answer →