What did the early atmosphere contain?

How old is the Earth?

What is in the atmosphere today?

How did the oxygen levels start to rise?

What type of radiation does the sun emit that is absorbed by the Earth?

What major gases contribute to the greenhouse effect?

How is methane produced?

What is the type of radiation that warms the surface of the Earth?

How is carbon dioxide produced?

How are rocks like limestone and chalk formed?

How were oceans formed?

How was nitrogen formed?

How are sedimentary rocks formed?

What is carbon footprint?

How do greenhouse gases help support life on Earth?

How do greenhouse gases help keep the Earth warm?

What does corrosion mean?

What is galvanising?

Advantages of galvanising:

The most common ores are metals bonded to ...

What is bioleaching?

What is phytomining?

What is a natural resource?

What is sustainable development?

What is potable water?

What are the effects of carbon monoxide?

What are the effects of sulfur dioxide and nitrogen oxides?

What are the effects of soot particulates?

What are four potential effects of global warming?

What are sterilising agents used for purifying water?

What is desalination?

Describe the process of desalination by distillation:

Describe the process of desalination by sedimentation:

How to reduce use of resources?

What are composites made up of?

What are ceramics?

Potable water in UK:

What happens to waste product (sludge) after sedimentation?

What happens to waste water after sedimentation?

LD poly(ethene):

HD poly(ethene)