Science exam S1 y8 Flashcards

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1
Q

Chemists use symbols to identify each element. They use…

A

1-2 letters to show the symbol

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2
Q

What element is the symbol of K

A

Potassium

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3
Q

Chloroplasts are found in

A

plants above the ground

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4
Q

cells are the building blocks of….

A

Plants and animals

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5
Q

The law of energy

A

cannot be created or destroyed

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6
Q

non metals have…

A

-low = lustre
-no = electrical conductivity
-low = density
-low boiling point

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7
Q

Metalloids have…

A
  • moderately high = lustre
  • low = electrical conductivity
  • medium = density
  • very high = boiling point
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8
Q

Metals have…

A
  • high = lustre
  • high = electrical conductivity
    -high = density
  • high = boiling point
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9
Q

Atomic number is the same as..

A

The elections and protons

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10
Q

Cell membrane helps to…

A

protect the cell

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11
Q

Cell wall

A

Provides support

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12
Q

Cytoplasm

A

keeps organelles together

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13
Q

Vacuole

A

stores water

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14
Q

Nucleus

A

provides instructions

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15
Q

Chloroplast

A

produces energy

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16
Q

Mitochondria

A

Provides energy

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17
Q

The law of conservation energy is…

A

Energy can not be destroyed or created

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18
Q

Heat is…

A

being hot

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19
Q

temperature is…

A

the intensity of heat in a substance

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20
Q

conduction is…

A

When the heat of the object transferes through to another objects through contact

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21
Q

convention is…

A

the process of tranferring heat through air or liquid currents

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22
Q

radiation is…

A

the flow of heat between objects that are not in contact with each other

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23
Q

Energy is…

A

The ability to do work or cause change

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24
Q

Kinetic energy is..

A

Moving energy

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25
Q

light energy is

A

Anything with light

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26
Q

Sound energy is…

A

Anything that gives of noise

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27
Q

Gravitational potential energy is….

A

Anything above the ground

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28
Q

Elastic energy is….

A

Anything stretched

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29
Q

Chemical energy is…

A

Anything with stored energy

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30
Q

Independent variable is…

A

The one changed

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31
Q

Dependant variable is…

A

The thing your testing

32
Q

Controlled variables…..

A

The things your keeping the same

33
Q

H is..

A

hydrogen

34
Q

Li is..

A

lithium

35
Q

He is…

A

helium

36
Q

Be is….

A

Beryllium

37
Q

B is…

A

Boron

38
Q

C is…

A

Carbon

39
Q

N is…

A

nitrogen

40
Q

O is…..

A

oxygen

41
Q

F is…

A

fluorine

42
Q

Ne is…

A

Neon

43
Q

Na is…

A

sodium

44
Q

Mg is…

A

magnesium

45
Q

Al is….

A

aluminium

46
Q

Si is…

A

silicon

47
Q

P is….

A

phosphorus

48
Q

S is…

A

sulfur

49
Q

Cl is…

A

Chlorine

50
Q

Ar is…..

A

Argon

51
Q

K is…

A

potassium

52
Q

Ca is…

A

Calcium

53
Q

How do you work out the number of neutrons

A

Subtract the atomic number from the atomic mass

Mass - Number
( round up and down the decimal points )

54
Q

A generalized cell is….

A

basic cell strucures

55
Q

A specialized cell includes….

A

A unique structure that allows it to carry through the body

56
Q

Lustre meaning

A

A glow on rock

57
Q

Melting point

A

A point where the metals change from solid - liquids

58
Q

Boiling point

A

Where liquids become a vapor or gas

59
Q

Electrical conductivity

A

how easily it allows electric current to flow though

60
Q

Heat conductivity

A

The ability to conduct heat through it

61
Q

Malleability

A

How easiy it can become formed into thin sheets of object

62
Q

How is the periodic table organized

A

In order of increasing the atomic number

63
Q

What does the eyepices lens do

A

magnifies the object

64
Q

What does the iris diaphragm do

A

adjust brightness

65
Q

What does the the light source do

A

Allows to see

66
Q

What is the stage on a micro

A

platform to do procedure on

67
Q

What does the coarse focus knob do

A

Sharpens the focus

68
Q

What does the fine focus knob do

A

shines light through specimen

69
Q

Name an animal specifed cell and the function

A

-red blood cell ( carries oxygen )
-muscle cell ( help movement )
-nerve cell ( Receives and sends messages through the body)

70
Q

How are igneous rocks formed

A

Through cooling of the magma / lava

71
Q

how are sedimentary rocks formed

A

through sediments under pressure

72
Q

how are metimorfic rocks formed

A

heat and pressure of sedimentary rocks

73
Q

How are sediments formed

A

Small rocks broken off during weathering and erosion

74
Q

What’s weathering

A

the breaking down or dissolving of rocks / minerals on the surface

75
Q

what’s erosion

A

the process in which minerals are worn away

76
Q

How do you work out the atomic number

A

the atomic number is just the order number