Facts (GCSE)

Question 1

Telescopes found fuzzy objects?

Answer 1

Nebulae.

Question 2

Intergalactic distances are usually measured in:

Answer 2

Mega Parsecs (Mpc)

Question 3

All objects(stars too) emit a continuous range of:

Answer 3

electromagnetic radiation.

Question 4

The luminosity and peak frequency of all hot objects(including stars) changes with:

Answer 4

Temperature.

Question 5

Ionisation =

Answer 5

The removal of electrons from atoms.

Question 6

The line spectra is produced by:

Answer 6

The movement of electrons in the atoms.

Question 7

The spectra of a star contains:

Answer 7

Specific spectral lines, which can tell us what chemical elements are in the star.

Hydrogen and helium are in all stars.

Question 8

H + H + brought close together to fuse =

Answer 8

He + energy

Question 9

Compressing gas in a protostar will raise its

Answer 9

Temperature

Question 10

Hotter core

Answer 10

Fusion

Question 11

(Hotter core ->) radiative zone

Answer 11

Energy transported to the surface by photons.

Question 12

(Hot core -> Radiative zone ->) Convective zone

Answer 12

Energy to the surface through convection.

Question 13

(Hot core -> Radiative zone -> Convective zone ->) Photosphere

Answer 13

Energy is radiated into space.

Question 14

Smaller stars become:

Answer 14

Red giants, when the core H is depleted.

Question 15

Larger stars become:

Answer 15

Red supergiants, when the core H is depleted.

Question 16

Red giants and supergiants will then both fuse helium atoms together to form heavier elements

Answer 16

C, N, O in order to make more energy.

Question 17

Major optical and infrared observatories on Earth are mostly in

Answer 17

Chile, Hawaii, Australia, the Canary Islands.

Question 18

To collect weak radiation from distant sources,

Answer 18

You’ll need large telescopes.

Question 19

Telescopes revealed that the Milky Way consisted of many stars =

Answer 19

Realisation that the sun is part of the Milky Way galaxy.