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

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
My red lip
More carbon dioxide (yellow) Normal (red) Less carbon dioxide (purple)
26
What colour at midday
Purple
27
What colour at midnight
Yellow
28
What colour at dawn
Orange/red
29
Compensation
Photosynthesis and respiration are equal