Stars and Cosmic Messages

Question 1 · multiple choice

Sunlight takes time to reach us, so we see the Sun…

As it was minutes ago As it will be tomorrow Instantaneously as it is As it was before Earth formed

Question 2 · multiple choice

A constellation is useful as…

A single giant planet A sky-pattern reference A nearby cloud of birds A physically tied star bundle

Question 3 · multiple choice

Which star colour generally indicates a hotter surface?

Deep red Blue Orange Red

Question 4 · multiple choice

Why do stars appear to twinkle strongly from the ground?

Their planets block them each second They blink like lamps Moving air bends their light Earth's oceans flash at them

Question 5 · true false

True or false: Stars in one constellation can lie at very different distances from Earth.

True False

Question 6 · multiple choice

A light-year measures…

Distance travelled by light in a year A star's birthday A planet's rotation time A telescope's exposure time

Question 7 · multiple choice

The Sun's main energy source is…

Burning coal Chemical batteries Friction with air Nuclear fusion

Question 8 · multiple choice

What connects radio telescopes and optical telescopes?

Needing human hearing Collecting only visible colours Measuring only sound Collecting electromagnetic radiation

Question 9 · multiple choice

A star's spectrum has dark lines. They can reveal…

Elements absorbing particular wavelengths Exact future flare dates Its nearest city's population The star's name in writing

Question 10 · multiple choice

A black hole is called black because within its event horizon…

No gravity exists All matter is painted black Light cannot escape outward Space contains only cold gas