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FSS - INTERGRATED SCIENCE > F2 - SEM1 - Living things and air - 7.2 > Flashcards

F2 - SEM1 - Living things and air - 7.2 Flashcards

1
Q

Plants make their own food by ____?

7.2 Photosynthesis

A

Plants make their own food by photosynthesis

7.2 Photosynthesis

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2
Q

____ is converted to ____ in food in the Photosynthesis

7.2 Photosynthesis

A

Light energy is converted to chemical energy in food in the Photosynthesis

7.2 Photosynthesis

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3
Q

Word equation of photosynthesis?

7.2 Photosynthesis

A

carbon dioxide+water —- light energy, chlorophyll —-> food (glucose) + oxygen

7.2 Photosynthesis

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4
Q

Chemical equation of photosynthesis?

7.2 Photosynthesis

A

6CO2 + 6H2O ——–> C6H12O6 + 6O2

7.2 Photosynthesis

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5
Q

What are the necessary factors for photosynthesis?

7.2 Photosynthesis

A
  • Light
  • Chlorophyll
  • Carbon dioxide
  • Water

7.2 Photosynthesis

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6
Q

Who are the producers and consumers in most food chains?

7.2 Photosynthesis

A
  • Plants are the producers
  • Animals are the consumers

7.2 Photosynthesis

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7
Q

Photosynthesis provides ________ and supplies ________ to other living things.

7.2 Photosynthesis

A

Photosynthesis provides a source of energy and supplies oxygen to other living things.

7.2 Photosynthesis

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8
Q

The green leaf cells contain a green pigment called ____ inside ____

7.2 Photosynthesis

A

The green leaf cells contain a green pigment called chlorophyll inside chloroplasts

7.2 Photosynthesis

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9
Q

What is the by-product of photosynthesis?

7.2 Photosynthesis

A

Oxygen

7.2 Photosynthesis

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10
Q

How to test for starch?

7.2 Photosynthesis

A

Turn iodine solution from brown to blue black

7.2 Photosynthesis

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11
Q

____ produced in plants during photosynthesis can be used immediately or stored as ____ for later user

7.2 Photosynthesis

A

Glucose produced in plants during photosynthesis can be used immediately or stored as Starch for later user

7.2 Photosynthesis

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12
Q

Steps of testing for starch in a green leaf and their purposes

7.2 Photosynthesis

A
  • Boil the leaf in water - Destroy the cell membranes of the leaf cells. Allows alcohol and iodine solution to get into the cells.
  • Put the leaf into hot alcohol - Remove chlorophyll from the leaf cellls so that the colour change can be observed
  • Wash the leaf in hot water - Remove the remaining alcohol and make the leaf soft
  • Add iodine solution to the leaf - Test for starch

7.2 Photosynthesis

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13
Q

What is the use of adding sodium hydrogencarbonate to the water?

7.2 Photosynthesis

A

Sodium hydrogencarbonate provides the water plants with carbon dioxide for carrying out photosynthesis

7.2 Photosynthesis

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14
Q

What is destarching?

7.2 Photosynthesis

A

Put the plants in the dark for at least 24 hours to remove all starch in the leaves

7.2 Photosynthesis

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15
Q

What is control set-up?

7.2 Photosynthesis

A

Control-setup is identical to the Experimental set-up except that the factor under investigation is absent

7.2 Photosynthesis

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16
Q

Why control set-up is important?

7.2 Photosynthesis

A

Ensure that any change observed in the experimental set-up is due to the factor under investigation but not other factors

7.2 Photosynthesis

17
Q

What is needed for testing if light is necessary for photosynthesis?

7.2 Photosynthesis

A

wrapped part of the leaf

7.2 Photosynthesis

18
Q

What is needed for testing if chlorophyll is necessary for photosynthesis?

7.2 Photosynthesis

A

variegated leaves - a leave with green part and non-green part

7.2 Photosynthesis

19
Q

What is needed for testing if carbon dioxide is necessary for photosynthesis?

7.2 Photosynthesis

A

soda lime - absorbs carbon dioxide

7.2 Photosynthesis

20
Q

Why photosynthesis is significant to other living things?

7.2 Photosynthesis

A
  • provide a source of energy
  • supply oxygen

7.2 Photosynthesis

21
Q

In the food chain, ____ are the producers and ____ are the consumers.

7.2 Photosynthesis

A
  • Plants are the producers
  • Aniamls are the consumers

7.2 Photosynthesis

22
Q

Plants can make their own food. They are ____ in food chains.

7.2 Photosynthesis

A

Plants can make their own food. They are producers in food chains

7.2 Photosynthesis

23
Q

True or False?

Oxygen is needed for photosynthesis

7.2 Photosynthesis

A

False

Carbon dioxide and water is needed

7.2 Photosynthesis

24
Q

True or False?

Water is a product of photosynthesis

7.2 Photosynthesis

A

False

food (glucose) and oxygen is product of photosynthesis

7.2 Photosynthesis

25
Q

True or False?

During photosynthesis, light energy from the sun is changed to chemical energy stored in the food produced

7.2 Photosynthesis

A

true

7.2 Photosynthesis

26
Q

Putting a leaf in boiling water can remove starch in the leaf

7.2 Photosynthesis

A

False
destroy cell membrances of leaf cell to allow alcohol and iodine solution to get into the cell

7.2 Photosynthesis

27
Q

True or False?

Chlorophyll in some of leaf cells absorbs chemical energy for producing food.

7.2 Photosynthesis

A

False

absorbs light energy for producing food

7.2 Photosynthesis

28
Q

True or False?

Energy is transferred from one living thing to another along a food chain

7.2 Photosynthesis

A

True

7.2 Photosynthesis

29
Q

Test for the product of photosynthesis

What is the purpose of boiling the leaf in water?

7.2 Photosynthesis

A

Destroy the cell membrane of the leaf

7.2 Photosynthesis

30
Q

Test for the product of photosynthesis

What is the purpose of putting the leaf into hot alcohol?

7.2 Photosynthesis

A

Remove chlorophyll from the leaf cells

7.2 Photosynthesis

31
Q

Test for the product of photosynthesis

What is the purpose of washing the leaf in hot water

7.2 Photosynthesis

A

Remove the remaining alcohol and make the leaf soft

7.2 Photosynthesis

32
Q

Add iodine solution to the leaf

7.2 Photosynthesis

A

Test for starch

7.2 Photosynthesis

FSS - INTERGRATED SCIENCE (35 decks)

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