photosynthesis Flashcards

1
Q

what is photosynthesis

A

light absorbed from the sun and converted into chemical energy in the form of glucose
it is an endothermic process

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2
Q

what is the word equation for photosynthesis

A

carbon dioxide + water = glucose + oxygen

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3
Q

what is the symbol equation for photosynthesis

A

6CO2 + 6H20 = C6H12O6 + 6O2

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4
Q

what happens to the glucose made

A

it is used to make energy by respiration
it can be stored as starch

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5
Q

how to test for starch

A
  1. place leaf in boiling water to kill the leaf
    2.place the leaf in boiling ethanol to remove the chlorophyll
    3.the leaf is dipped into water to soften it.
    4.iodine is added
    5.if present starch goes from yellow/brown - blue/black
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6
Q

limiting factors

A

carbon dioxide,light,temperature

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7
Q

normal CO2

A

red

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8
Q

higher CO2

A

yellow

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9
Q

lower CO2

A

purple

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10
Q

what part of the plant does photosynthesis take place

A

leaves

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11
Q

why is photosynthesis described as endothermic

A

energy is absorbed from the sun

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12
Q

what is the chemical that traps light energy

A

chlorophyll

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13
Q

three ways a leaf is adapted to absorb light

A

large surface area
thin
packed with chloroplasts

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14
Q

two ways the leaf is adapted for gas exchange

A

air spaces
small opening

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