Atmopshere

Name the early bacteria that carried out photosynthesis and formed stromatolites.

• carbonates

• iron pyrite

• cyanobacteria

• Helico bacter

Which of these are rocky planets, like Earth?

• Venus and Mars

• Jupiter and Saturn

• Mars and Mercury

• Neptune and Venus

Which of these is a rock only formed in the absence of oxygen?

• iron oxide

• iron pyrite

• sodium carbonate

• calcium carbonate

The Earth's temperature cooled so the water vapour ..........

Which gas makes a squeeky pop when you light it with a lit splint?

• oxygen

• carbon dioxide

• hydrogen

• methane

Which of these can be used to test for carbon dioxide?

• a glowing splint

• phenolphthalein

• limewater

• methyl orange

In complete combustion, which reactant is in limited supply?

• fuel

• carbon dioxide

• carbon monoxide

• oxygen

Which of these is a greenhouse gas?

• oxygen

• liquid water

• methane

• nitrogen

Which type of electromagnetic radiation is contributing to global warming as it is being trapped within our atmosphere by greenhouse gases?

• x-ray

• visible

• infrared

• ultraviolet

scientists have found evidence of carbon dioxide trapped in ice that dates back how many years?

• 8

• 800

• 8 000

• 800 000