Pass through lime water turning it cloudy if present, Put a lighted splint into a sample burns with a popping noise, Put a glowing splint into the sample and the splint relights.

Put a glowing splint into the sample and the splint relights, Put a lighted splint into a sample burns with a popping noise, Pass through lime water turning it cloudy if present.

Put a glowing splint into the sample and the splint relights, Pass through lime water turning it cloudy if present, Put a lighted splint into a sample burns with a popping noise.

oxidation

thermal decomposition

reduction

Oxygen 21% Nitrogen 78% Argon 0.9% Carbon dioxide 0.037%

Oxygen 51% Nitrogen 28% Argon 0.9% Carbon dioxide 0.037% Hydrogen 20%

Oxygen 73% Carbon dioxide 27%

Pale green precipitate

Rusty brown precipitate

White precipitate

Yellow precipitate

No change

Which substances are present

How much of each substance there is

The molecular formula of a substance

How much of each substance there is

Which substances are present

Whether it is an anion or ion

Red-pink, lilac, orange, red-orange, green-yellow, green, blue

Orange, lilac, red-orange, red-pink, blue, green, green-yellow

Red-orange, lilac, orange, blue ,green-yellow, green, red-pink

A - Calcium chloride B - Potassium iodide

A - Lithium chloride B - Potassium sulphate

A - Lithium bromide B - Sodium chloride

A - Sodium iodide B - Calcium iodide

No because there is no evidence directly suggesting this

Carbon dioxide is a greenhouse gas because it absorbs infra-red radiation given off from Earth's surface. However it isn't contributing to climate change because climate change is a process that has been happening all the time for example ice ages like huronian and greenhouse periods like 368 million years ago in the Paleozoic Era.

No because there is more evidence suggesting that water vapour is the thing causing the global warming as it forms clouds causing the heat to be reflected and trapped, causing the earth to heat up more.

Carbon dioxide is a greenhouse gas because it absorbs infra-red radiation given off from Earth's surface. It is contributing to climate change because it is trapping the heat inside the earth's atmosphere causing it to heat up.