Photosynthesis Flashcards

1
Q

What does chlorophyll do

A

Absorbs the light energy

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2
Q

What does carbon dioxide do

A

Diffuses into the leaves from the air

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3
Q

What does water do

A

Absorbed by the roots from the soil

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4
Q

Oxygen

A

Some is used in respiration the rest diffuses from the leaves into the air

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5
Q

Glucose

A

Some is used in respiration the rest is stored as starch or used for making other substances. This is an endothermic reaction

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6
Q

How to de starch a plant

A

Leave in a dark Cupboard for 24-48 hours.

Starch is used for respiration

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7
Q

Why is it important to turn off the Bunsen burner when you were heating ethanol

A

Ethanol is highly flammable

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8
Q

Why is it important to remove the chlorophyll before testing for starch 

A

So we can see the colour change

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9
Q

What colour will the iodine turn to if starch is present

A

Blue/black

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10
Q

What could you do to check the plant been de starched

A

Test for starch

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11
Q

Independent variable

A

Whether it has light or not

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12
Q

Dependent variable

A

Where there is starch

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13
Q

Control variables

A

The same plant

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14
Q

What part of the leaf is blue black

A

Where there is starch, the green part

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15
Q

Why are there some parts of the leaf that do not contain starch

A

There is no chlorophyll so they can’t photosynthesise

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16
Q

If there is no carbon dioxide will the leaf contain starch

A

No

17
Q

Why will the leaf not contain starch if there is no carbon dioxide

A

The soda lime gets rid of the carbon dioxide

18
Q

When does respiration take place

A

All the time

19
Q

When does photosynthesis take place

A

In the light

20
Q

What 2 metabolic processes do plants carry out

A

Respiration and photosynthesis

21
Q

Which process requires oxygen

A

Respiration

22
Q

What process produces oxygen

A

Photosynthesis

23
Q

Photosynthesis word equation

A

Carbon dioxide + water ——> glucose + oxygen

24
Q

Respiration word equation

A

Glucose + oxygen —-> carbon dioxide + water

25
Q

My red lip

A

More carbon dioxide (yellow)
Normal (red)
Less carbon dioxide (purple)

26
Q

What colour at midday

A

Purple

27
Q

What colour at midnight

A

Yellow

28
Q

What colour at dawn

A

Orange/red

29
Q

Compensation

A

Photosynthesis and respiration are equal