WJEC GCSE Science Double Award The Earth and its resources (Unit 2) overview quiz quiz
14questions. Pick an answer and you'll see why right away.
Which stage of water treatment kills harmful microorganisms?
What is a saturated solution?
At normal pressure, pure water boils at exactly which temperature?
What are the approximate proportions of the two main gases in today's atmosphere?
What is thought to have released the gases of the Earth's early atmosphere?
Which process added oxygen to the early atmosphere over time?
Which gas is the main contributor to the human-enhanced greenhouse effect?
What are the products of the complete combustion of a hydrocarbon?
Why is carbon monoxide dangerous?
Which pollutant from burning fuels causes acid rain?
What is produced when limestone is heated strongly (thermal decomposition)?
What is made when water is added to quicklime?
Why is slaked lime spread on fields?
Which test confirms a gas is carbon dioxide?