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Year 9 Science > Plants And Photosynthesis > Flashcards

Plants And Photosynthesis Flashcards

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0
Q

What is the equation for photosynthesis?

A

Water + carbon dioxide (+ light energy) ➡️ glucose + oxygen.

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1
Q

What is photosynthesis ?

A

A chemical reaction so it has an equation.

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2
Q

What are the reactants in the photosynthesis equation?

A

Water + carbon dioxide.

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3
Q

What are the products in photosynthesis?

A

Glucose + oxygen.

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4
Q

What are needed for photosynthesis to happen?

A

Light and chlorophyll.

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5
Q

What happens to light during photosynthesis?

A

The light energy is changed into chemical energy which is stored in the glucose that is made.

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6
Q

Root hair cells group together to form …

A

Root hair tissue.

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7
Q

How do plants get water?

A

Water is taken out of the soil by the roots.

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8
Q

How are roots specially adapted to take in a lot of water?

A

They branch and spread out to absorb water from a large volume of soil. Also, root hair cells have a large surface are to help absorb water quickly.

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9
Q

Which plant cell prevents water loss from leaves?

A

Guard cell

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10
Q

Which raw material is needed for photosynthesis that enters the leaf through the stomata?

A

Carbon dioxide.

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11
Q

When does respiration happen in plants?

A

All the time.

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12
Q

Are you more likely to find stomata on the upper or lower side of a leaf?

A

.lower

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13
Q

In which part of the plant does photosynthesis happen?

A

Leaves

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14
Q

Why do plants have roots?

A

To get water from the soil and for support.

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15
Q

What are all the raw materials for photosynthesis?

A

Carbon dioxide and water

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16
Q

Describe the movement of gases through stomata during photosynthesis.

A

Oxygen moving out of the leaf.

Carbon dioxide moving into the leaf.

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17
Q

How is glucose carried around a plant?

A

Phloem tubes.

18
Q

In which plant cell does the most photosynthesis happen?

A

Palisade cell

19
Q

Where does the water flow up?

A

The xylem tubes.

20
Q

What are the xylem tubes made of?

A

Hollow cells.

21
Q

Why is water needed?

A

To keep the plant hydrated.
Mineral salts. - these keep plants healthy.
Stops plants from wilting.
Keeps leaves cool.

22
Q

What does the carbon dioxide do.

A

Diffuses into the cells using the stomata which are small holes

23
Q

Why are the leaves thin?

A

So the carbon dioxide does not need to go very far before reaching the cells that need it.

24
Q

When can photosynthesis be sped up?

A

If the amount of carbon dioxide around the plant is increased.
If there is more light.

25
Q

How do leaves trap as much sunlight as possible?

A

They are wide and have a large surface area.

26
Q

Where are palisade cells?

A

In the upper surface of leaves.

27
Q

Where does most photosynthesis occur?

A

In the palisade cells.

28
Q

What are palisade cells packed with?

A

Chloroplasts.

29
Q

Why are chloroplasts needed for photosynthesis?

A

They contain chlorophyll which absorbs light energy.

30
Q

How do plant cells release energy that is stored in glucose?

A

Aerobic respiration.

31
Q

What is the word equation for aerobic respiration?

A

Glucose + oxygen ➡️ carbon dioxide + water (+ energy)

32
Q

Why do all living this gd need energy?

A

So they can respire

33
Q

When do photosynthesis and respiration happen?

A

Respiration happens all the time.

Photosynthesis only happens when there is light.

34
Q

What is glucose?

A

A type of sugar

35
Q

What is glucose used for?

A

Respiration
Making other substances that act as stores of energy ( eg starch)
Making new materials for growth.

36
Q

What is glucose turned into?

A

Cellulose (this is used for cell walls), fats and proteins.

37
Q

How do plants make proteins?

A

Mineral salts called nitrate are needed.

38
Q

What do phloem tubes carry?

A

New substances in a plant.

39
Q

What do new substances in a plant do?

A

Help to build up a plants biomass.

This is the mass of all the materials in the plants except from water.

40
Q

How do plants store the food they make?

A

In the glucose

41
Q

How do plants store the food they make?

A

In the glucose

42
Q

In which weather conditions would the guard cells close the stomata to prevents water loss?

A

Dry and windy

43
Q

Which plant cell prevents leaf water loss?

A

Guard cell

Year 9 Science (8 decks)

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