Earth
The sphere that involves rocks and soil.
lithosphere
What is the process called when water is heated and turns into vapour?
evaporation
What type of galaxy is the Milky Way?
What is the current theory about the beginning of the universe called?
Big Bang
How old is the Sun currently?
5 billion years
The sphere that relates to the gases around us.
atmosphere
What is the process called when water vapour cools down and turns into clouds?
Are the galaxies expanding or getting smaller?
expanding
The theory that says the universe as we know it started with an infinitely hot and dense single point that inflated and stretched — first at unimaginable speeds, and then at a more measurable rate — over the next 13.7 billion years to the still-expanding cosmos that we know today.
Big Bang
Stars are initially made of this gas.
hydrogen
The sphere that relates to all life on earth.
Biosphere
What is the process called when water droplets get too heavy and fall to the earth?
precipitation
What does a light-year measure?
The distance light travels in a year.
What are the two main pieces of evidence for the Big Bang theory?
red shift
cosmic background radiation
The uppermost atmosphere of the sun, which can only be seen during a solar eclipse.
The sphere that relates to all forms of water.
hydrosphere
What is the process called when rain hits the ground and then flows into rivers, lakes, oceans etc.
collection
What star is at the centre of our galaxy?
Sun
When objects in space travel away from us at very high speeds it is called this.
Red shift
What are the three possible end products of a star's lifetime?
neutron star, black hole, white dwarf
List the four spheres and what they relate to.
atmosphere - air/gases
hydrosphere - water
lithosphere - rocks, soil
biosphere - all living things
What are the four main processes in the water cycle?
evaporation, condensation, precipitation, collection
What is the speed of light?
3 x 108 m/s
3 billion m/s
There is evidence for the Big Bang theory as this is still detected around us.
Cosmic background radiation
The huge explosion that the heaviest stars go through towards the end of their lives?
supernova