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Year 9 Exam Revision > Science > Flashcards

Science Flashcards

1
Q

In a series circuit the voltage is ??? between the components

A

Shared

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2
Q

The voltage supplied to each parallel branch is ???

A

The same

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3
Q

Function of spongy layer

A

Allow carbon dioxide to diffuse through the leaf

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4
Q

Function of stomata

A

Alows carbon dioxide to enter the leaf and oxygen to leave

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5
Q

Function of palisade cell

A

Let chloroplasts absorb sunlight

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6
Q

Function of way layer

A

Protect the leaf without blocking out light

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7
Q

Guard cells

A

Controls the opening and the closing of the stomata

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8
Q

Air gaps

A

Allow carbon dioxide to diffuse through the leaf

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9
Q

What is the role of the leaf in a plant?

There’s two

A

The main role of the leaf is to collect sunlight for photosynthesis - to make plants food (glucose)
Another is to allow carbon dioxide out of the leaf and oxygen in.

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10
Q

Function of a cell wall

A

Provides structure and support to the cell

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11
Q

Function of a cell membrane

A

Controls what enters and leaves the cell

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12
Q

Function of a cytoplasm

A

When reactions occur within the cell

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13
Q

Function of a Nucleus

A

Controls the activities in the cell and contains genetic material

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14
Q

Function of a vacuole

A

Where starch and water are stored

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15
Q

Function of a chloroplast

A

The site of photosynthesis

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16
Q

What goes into the plant?

A

Oxygen

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17
Q

What does the plant release?

A

Carbon dioxide

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18
Q

Water can only fly uo the plant, so it will always travel up from the roots, and leave through the stomata.
Xylem or Phloem?

A

Xylem

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19
Q

Pop Star Can Make Absolute Zillions If Tiny Little Children Spend Gold Pennies

A

Potassium, Sodium, Calcium, Magnesium, Aluminium, Zinc, Iron, Tin, Lithium, Copper, Silver, Gold, Platinum

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20
Q

Difference between metals and non-metals?

Three each

A

Metal : Good conductor of heat, good conductor of electricity, magnetic, shiny, soluble,malleable, sonorous sound, high melting points, solid at room temperature and ductile
Non-metals : Low boiling point, not shiny, bad conductor of heat, bad conductor of electricity, dull sound, brittle

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21
Q

What does MASH stand for?

A

Metal + Acid ——> Salt + Hydrogen

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22
Q

What does BASHO stand for?

A

Base + Acid ——> Salt + Water

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23
Q

What does CASHOCO stand for?

A

Carbonate + Acid ——> Salt + Water + Carbon dioxide

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24
Q

Test for hydrogen

A

Squeaky pop

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25
Q

Glucose can travel up and down, it is made in the leaves and can go down to the roots, or travel further up the plants.
Xylem or Phloem?

A

Phloem

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26
Q

Test for Carbon Dioxide

A

Lime water goes cloudy

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27
Q

Test for oxygen

A

The splint delights itself

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28
Q

What does the ammeter measure?

A

The current

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29
Q

Does the current get shared in a parallel circuit?

A

Yes

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30
Q

Does the current get shared in a single circuit?

A

No

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31
Q

How does water dispersal occur?

A

When the fruit and the seed are able to float along the water source, they’ll germinate in the water or when they reach their destination

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32
Q

What name is given to the change of speed that happens between 0 and 4 seconds?

A

Acceleration

33
Q

What makes a fuel great?

A

Good cost, abundant, safe, environmentally friendly, transport easily, easily ignited, sustainable, efficiency

34
Q

What causes global dimming?

A

Carbon (soot)

35
Q

Does monoxide kill?

A

Yes, it’s toxic

36
Q

What does acid rain kill?

A

Buildings, forest crops, statues and aquatic animals

37
Q

Name the four seed dispersal

A

Water Dispersal
Animal Dispersal
Ejection Dispersal
Wind Dispersal

38
Q

What is respiration?

A

Where the body creates energy so you can make movements

39
Q

What are the 7 terms we use to decide whether something is living or not?
MRS GREN

A 
Movement 
Respiration 
Sensitivity 
Growth 
Reproduction 
Excretion 
Nutrition
40
Q

How do substance enter and exit a cell?

A

Diffusion

41
Q

Why are bees so important to plants?

A

They help plants reproduce

42
Q

What does chloroplasts contain?

A

Chlorophyll

43
Q

Why are leafs green?

A

Because the chlorophyll from the chloroplasts makes it that colour

44
Q

What is the role of the red blood cell?

A

To carry more oxygen around the body

45
Q

What is the role of the nerve cell?

A

To transmit messages from one part of the body to an another

46
Q

What is the role of the egg cell?

A

They are utilised by female organisms to reproduce offspring

47
Q

What is the role of the sperm cell?

A

To pass on biological information required to produce a new organism

48
Q

Cells that have features so that they can do particular jobs are called???

A

Specialised cells

49
Q

What substance do red blood cells carry around the body?

A

Oxygen

50
Q

Nerve cells can transmit electrical signals because they are???

A

Long and thin

51
Q

What is the role of the root hair cell?

A

Allow the plant to absorb more water. They also allow the plant to rake in the minerals in needs to survive.

52
Q

What is inheritance?

A

Parents pass on their alleles on to offspring

53
Q

What are alleles?

A

It is a variation of a gene.

54
Q

What is a chromosome?

A

Thin strands of DNA

55
Q

What is a gene?

A

A small section of DNA on a chromosome that codes for a protein.

56
Q

Where are chromosomes found?

A

Nucleus

57
Q

What is photosynthesis?

A

When the plant makes food for itself

58
Q

Name two highly important reactions that move carbon around the environment

A

Photosynthesis

Respiration

59
Q

Equation for photosynthesis

A

Carbon dioxide + Water ——> Oxygen + Glucose

60
Q

Equation for respiration

A

Oxygen + Glucose ——> carbon dioxide + water

61
Q

What is Global Warming?

A

It is the term used to describe a gradual increase in the average temperature of the earth’s atmosphere and its oceans.

62
Q

What are the greenhouse gases?

A 
Water vapour 
Carbon dioxide 
Methane
Nitrous oxide 
Ozone
63
Q

What activities do we do that contribute to greenhouse gases

A

Deforestation
Burning Fossil Fuels
Distributing fossil fuels releases greenhouse gases
Animals emit methane

64
Q

What happens in exothermic and endothermic reactions?

A

In endothermic reactions, energy enters

In exothermic reaction, energy exits

65
Q

Name one type of chemical reaction that is exothermic

A

Combustion

Neutralisation

66
Q

Name one type of chemical reaction that is endothermic

A

Thermal decomposition

67
Q

What is Thermal Decomposition?

A

Carbon dioxide caused by heat

68
Q

Where is the genetic material found in cells?

A

Nucleus

69
Q

Name the greenhouse gases

A

Water vapour
Carbon dioxide
Methane

70
Q

How do humans create global warming?

A

Because breathe out water vapour and carbon dioxide. We also release methane from our bottom.

71
Q

How is acid rain made?

A

Sulphur dioxide and Nitrogen oxide gases are released they go into the clouds (mixed with water vapour) and rain back down.

72
Q

Causes of Nitrogen acid

A

Cars
Engines
Factories

73
Q

Cause of Sulphur dioxide

A

Burning coal
Burning charcoal
Burning wood

74
Q

What is combustion?

A

Burning a fossil fuel in oxygen

75
Q

Thermal decomposition

A

What goes in must come out

76
Q

Where do you get greenhouse gases?

A

Burning fossil fuels(factories)
Cars
Farming
Deforestation

77
Q

Effects of greenhouse gases

A

Rise of sea levels
Melting ice caps
Extreme whether - fires

78
Q

Why is Nitrogen oxide and Sulphur dioxide bad?

A

Gets into lakes
Erode building
Kills trees

Year 9 Exam Revision (7 decks)

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