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Science Yr 8 - Revision > Revision Test Nov Yr 8 > Flashcards

Revision Test Nov Yr 8 Flashcards

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Biology 101 flashcards
1
Q

What is photosynthesis

A

Plants make food through the process of photosynthesis

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2
Q

Where does photosynthesis take place

A

Mainly takes place in the chloroplasts in the leaf cell

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3
Q

Photosynthesis word equation

A

Carbon dioxide + water —> glucose + oxygen

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4
Q

What else is needed - photosynthesis

A

Light and chlorophyll

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5
Q

What minerals do plants need & how could u tell if they are deficient in these?

A

Nitrates, phosphates, potassium, magnesium

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6
Q

Aerobic respiration- what is it ?

A

A chemical reaction that is used with oxygen to create energy from carbohydrates (sugar)

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7
Q

How can u tell they are deficient? Minerals

A

Nitrates - plant will have poor growth and older leaves are yellowed

Magnesium- plants leaves will turn yellow

Phosphorus- plant will have poor root growth and younger leaves look purple

Potassium- has yellow leaves with dead patches

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8
Q

We’re does aerobic respiration take place ?

A

That takes place inside a cell in the mitochondria

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9
Q

Word equations- aerobic respiration

A

Glucose + Oxygen —> carbon dioxide + water + energy

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10
Q

Anaerobic respiration- what is it ??

A

Plants and microorganisms can also respire without oxygen

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11
Q

Word equation - anaerobic respiration

A

Glucose —> ethanol + carbon dioxide (+energy)

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12
Q

In animal cells - anaerobic respiration

A

Glucose -> lactic acid _ creates cramp

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13
Q

In yeast - Anaerobic respiration

A

Yeast form ethanol and carbon dioxide during anaerobic respiration- this is known as fermentation and is used in the manufacture of bread and alcoholic drinks - ethanol ends in “ol” so we know it’s an alcohol - useful bc it makes bread and alcohol

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14
Q

Exercise - what happens to our ❤️rate and breathing rate when we exercise

A

It increases a lot - because you need energy to make ur muscles work and to get energy you need respiration and for that to happen you need oxygen and glucose so you heart pumps faster to get more blood around the body which delivers oxygen and glucose.

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15
Q

What is oxygen dept? Exercise

A

After you have done exercise you become out of breath cus u need to take in oxygen to break down all the Latic acid

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16
Q

Ecology definitions: interdependence

A

If two organisms both depend on each other for something this is called interdependence

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17
Q

Food chain?

A

A food chain is a diagram that shows what an organism eats

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18
Q

Food web?

A

Most animals eat more than one organism so scientists show this in food webs

19
Q

Producer?

A

Plants are producers they make their own food through the process of photosynthesis

20
Q

Consumer?

A

Are organisms that eat other animals or plants to obtain food

21
Q

Herbivore?

A

Animals that only eat plants and vegetation

22
Q

Carnivore?

A

Animals that only eat meat

23
Q

Predator?

A

They eat other animals

24
Q

Prey?

A

They get eaten by other animals

25
Q

Bioaccumulation?

A

Toxic chemicals can build up in organisms through a food chain this is bioaccumulation

26
Q

Ecosystem?

A

This is the name given to the plants and animals that are found in a particular location and the area in which they live these animals and plants depend on each other to survive

27
Q

Habitat?

A

The area they live in

28
Q

Community?

A

The organisms in an ecosystem

29
Q

Population?

A

The number of organisms of one species

30
Q

Niche

A

This is a particular place or role that an organism has within an ecosystem

31
Q

Periodic table - what do we call group 0

A

Noble gases

32
Q

What is listed and how are these classified

A

They are listed by elements and classified as metals and non metals

33
Q

Columns are called?

A

Groups

34
Q

Rows are called?

A

Periods

35
Q

What are the properties of metals

A

Metals
————-
Sonorous
Good conductor of electricity
High density
Shiny
Malleable
Good conductor of heat
Oxides form alkaline solutions
Ductile

36
Q

Properties of non metal?

A

Non metals
——————-
Not sonorous
Poor conductor of electricity
Low density
Dull
Brittle
Poor conductor of heat
Oxides form acidic solutions

37
Q

What do we call group 1?

A

Alkaline metals

38
Q

What is group 7 called ?

A

Halogens

39
Q

What is the trend in reactivity? - group 1

A

Gets more reactive as it goes down

40
Q

How do they react with h20

A

Very aggressively

41
Q

Trend in reactivity group 7

A

Decreases as it goes down

42
Q

What is the displacement reaction

A

When 1 thing kicks out antöne mother to do with we’re it is in the list

43
Q

What properties do the elements have?

A

Very unreactive

Science Yr 8 - Revision (2 decks)

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