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Year 8 > Science Exam Revision > Flashcards

Science Exam Revision Flashcards

1
Q

what’s the word equation for photosynthesis

A

Water + Carbon Dioxide—–> oxygen + glucose

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2
Q

Where does photosynthesis happen?

A

In the chlorophyll of the chloroplasts in a plant cell

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3
Q

How does carbon dioxide enter and oxygen leave the plant?

A

Through the stomata

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4
Q

Does respiration happen in all living things all the time and what does it make?

A

Yes and it makes energy

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5
Q

What’s the word equation for respiration?

A

Glucose + oxygen—–> carbon dioxide + water

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6
Q

Where does gas exchange happen?

A

In the lungs

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7
Q

What adaptations do polar bears have?

A

Lots of fur for insulation

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8
Q

What are the causes of variation

A

Genetic and environmental

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9
Q

What is continuous variation

A

A range of values across a population : height

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10
Q

What is discontinuous variation?

A

Groups or categories : blood group

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11
Q

What process occurs evolution

A

Natural selection

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12
Q

In the periodic table are groups vertical or horizontal

A

Vertical

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13
Q

In the periodic table do periods go vertical or horizontal

A

Horizontal

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14
Q

What same properties do groups have in the periodic table?

A

Appearance, melting point, reactions with other elements

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15
Q

What do chemical reactions combine to make a new product

A

Reactants

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16
Q

What does burning always make?

A

Carbon dioxide and water

17
Q

What is thermal decomposition

A

The breaking down of a compound using heat

18
Q

Name a common acid

A

Vinegar

19
Q

Name a common alkali

A

Baking soda

20
Q

Names use for neutralisation

A

Alkaline digestion pills to.break down acid in the stomach

21
Q

Why are plants producers?

A

Because they make their own food by photosynthesis

22
Q

What does continuous variation normally show and what is it called?

A

A bell shaped curve called normal distribution

23
Q

What’s the test for carbon dioxide gas?

A

The limewater turns cloudy

24
Q

What is an alkali

A

A base that is soluble in water

25
Q

what does natural selection require?

A

Variation , overproduction , competition, survival of the fittest and many generations

26
Q

What does transmits mean

A

Light can travel through it like air

27
Q

Luminous

A

Gives out light

28
Q

What does emits mean

A

Gives out something

29
Q

What is Hookes law?

A

If the force doubles the extension on a spring also doubles

30
Q

Give examples of non contact and contact forces

A

Friction and magnetic

31
Q

What is refraction

A

When light bends depending on the density of the air

Year 8 (11 decks)

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