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year 9 exams > science > Flashcards

science Flashcards

1
Q

reactants and products of photosythesis

A

reactants-carbon dioxide and water
products-oxygen and glucose

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2
Q

Aerobic respirtation

A

breaking down glucose with oxygen

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3
Q

effects of excersice resperation

A

increase of heartrate
pumps blood around body
start breathing faster as not inhaling as much oxygen
become hotter
sweatier

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4
Q

Anaroebic resperation

A

breaking down glucose in the absence of oxygen
can cause muscle fatuige beacsue of buildup of latic acid

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5
Q

Fermentation

A

chemical that breaks down glucose anaroebically

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6
Q

Conservation of mass

A

During
chemical reactions
or a change of state, no atoms
are created or destroyed.

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7
Q

combustion reactions

A

When a substance burns, it reacts with oxygen. This is known as combustion. All combustion reactions are exothermic

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8
Q

Thermal decompistion

A

chemical reaction that happens when a compound breaks down when heated

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9
Q

Endothermic Reaction

A

endothermic chemical reaction causes a decrease in temperature (of the surroundings).

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9
Q

Exothermic Reaction

A

causes an increase in temperature (of the surroundings).

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10
Q

properties of magnets

A

north and south pole opposites attract

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11
Q

how magnets interact with other magnetic feilds

A

If using 2 or more magnets they can either attract to one another or repel. This depends on what poles of the magnets are facing each other.

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12
Q

uses of elctromagnets

A

levitatiom eg trains

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13
Q

investigating electromagnets strength

A

how many coils are wrapped around the iron core
the current voltage
the type of core

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14
Q

what is the purpose of respiration

A

to release energy

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15
Q

where in cells does respiration take place

A

aerobic-mitochondria
anaroebic-cyptoplasm

16
Q

what are the reactants and products of aerobic respiration

A

reactants- glucose and oxygen
products-carbon dioxide and water

17
Q

why does change take place when doing excersice

A

more blood pumped around the body

18
Q

what is fermentation 2

A

anaroebic respiration in yeast

19
Q

what are the reactants of fermentation

A

glucose

20
Q

what are the products of fermentation

A

carbon dioxide and ethanol

21
Q

word eqaution to show fermentation

A

glucose-ethanol+carbon dioxide

22
Q

why is glucose stored as starch in plants

A

excess glucose

23
Q

what colour is the chemical before startch is added

A

orange

24
Q

how are root hair cells more adapted for photosynthesis

A

large surface area to absorb more water

25
Q

how are palaside cells adapted for photosythesis

A

lots of chloropylast ontop of leafs to absorb more light

year 9 exams (3 decks)

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