Photosynthesis

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Iodine

A chemical that tests for the presence of starch; it is brown in the bottle, but does black when starch is present

oxygen

a clear gas with no smell; it is found in our atmosphere (the air). Plants produce oxygen as a result of photosynthesis

carbon dioxide

a gas found in the air; it is breathed out by humans and other animals. Plants also produce it, but use lots up during photosynthesis.

chlorophyll

a green pigment in plants that absorbs the light energy used to carry out photosynthesis

photosynthesis

a process that occurs is plants and some other organisms; carbon dioxide is used to make sugars

starch

a substance which plants make when they have excess sugars (storing starch is a way of storing energy for later use)

producer

able to make your own food. Plants are an example of this

consumer

if you have to eat other organisms to get energy you are a consumer. Animals are consumers.

light

light is a type of energy; it is sometimes called 'radiant energy'. Plants use it during photosynthesis.

chloroplasts

the part of a plant cell where photosynthesis happens; they contain the chlorophyll pigment

roots

the part of the plant that can take up water

carbon dioxide, water and light

three things plants need in order to undertake photosynthesis

stomata

tiny openings (holes) on the underside of a leaf

oxygen and sugars

two things produced by plants during the process of photosynthesis

leaves

where photosynthesis occurs (happens)


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