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Science exam questions Flashcards

1
Q

What is volatile substances

A

Volatile substances can vaporise

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2
Q

To call something matter what does the item need to have?

A

Mass and volume

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3
Q

How much kinetic energy does the solid, liquid and gas have?

A

Solids - not much kinetic energy they can only vibrate
Liquids - more kinetic energy than a solid
Gas - have the most kinetic energy of them all

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4
Q

What are the properties of a Solid?

A

They have a fixed shape and volume
The particles don’t have a lot of kinetic energy they can only vibrate
They are in a fixed position

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5
Q

What are the properties of a Liquid?

A

The particles are close together but they can move around
Doesn’t have a fixed shape
Has a fixed volume
Has more kinetic energy than a solid

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6
Q

What are the properties of a Gas?

A

Move around freely
They have the most kinetic energy
They don’t have a fixed shape or volume

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7
Q

What is tensile strength?

A

Tensile strength is force needed to break something

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8
Q

What is Compressional Strength?

A

Compressional strength is when a substance can withstand force

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9
Q

What state of matter can and can’t be compressed?

A

Solids and liquids can not be compressed only gas can

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10
Q

What is diffusion?

A

Spontaneous spreading of a substance through a liquid or gas

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11
Q

In which state of matter can diffusion occur fastest?

A

Diffusion occurs faster in Gas

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12
Q

What is density?

A

Mass of a certain volume of a substance

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13
Q

What is the formula for density?

A

Mas
———- = Density
Volume

Or mass divided by volume equals density

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14
Q

What is chemical properties?

A

Chemical properties is how the substance reacts in a chemical reaction. Eg: permanent colour change, permanent change of state

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15
Q

What is physical properties?

A

Physical properties is what we can observe and measure without changing its state eg: colour, texture, boiling point and density

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16
Q

When there is one or more cells what is it called?

A

Multicellular

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17
Q

What is another name for one cell

A

Single cellular or uni celluar

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18
Q

What are the 2 types of microscopes?

A

Stereo and light microscope

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19
Q

How do you prepare a slide?

A

First you get a slide and put a thin layer of the organism. You then add a tiny bit of water on top. If the organism is clear you can add a stain. Then you add the cover slide on top.

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20
Q

What is stain made of?

A

Iodine

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21
Q

What’s are the 11 things in a microscope?

A 
Eye piece
Microscope tube
Corse focus knob
Fine corse focus knob
Arm
Objective lense
Slide clips
Mirror
Stage
Base
Revolving nose peice
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22
Q

Cell membrane

A

Controls the entry and exit of the cell

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23
Q

Cell wall

A

The layer surrounding the cell membrane

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24
Q

Nucleus

A

Controls the centre of the cell

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25
Q

Cytoplasm

A

A cell inside the cell membrane which Contains organelles

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26
Q

Vacuoles

A

Large Storage compartment in plant cells

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27
Q

Ribosomes

A

Creates protein for the cell

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28
Q

Mitochondria

A

Powerhouse of the cell

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29
Q

Chloroplasts

A

Allows the plant to make food out of of photo synthesis

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30
Q

What is the process of mitosis

A 
Parent cell
       |
      \/
Dna replicates 
       |
      \/
Daughter cells
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31
Q

Prokaryotic cells are?

A

The most primitive cellular forms on earth and they are unicellular

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32
Q

Eukaryotic cells are?

A

More complex and are multicellular

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33
Q

Steam is a…

A

Liquid not a gas

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34
Q

What is melting point?

A

A temperature where a substance melts

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35
Q

What is boiling point?

A

A temperature where a substance boils

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36
Q

2 types of strength

A

tensile and compressional

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37
Q

What is hardness

A

The ability to scratch a substance with another substance

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38
Q

What is viscosity

A

Thickness or gooyness of a liquids

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39
Q

What is conductivity

A

How easy something moves through a substance

40
Q

What is heat capacity

A

How much heat is needed to increase the temperature of a substance

41
Q

What is compressibility

A

Ability of substance to be compresses

Liquids and solids can not be compressed

42
Q

What is heating particles

A

All objects and substances expand what the temperature increases

43
Q

What is Particle pressure

A

The corse of air pushing against something

Eg air pressure

44
Q

What is the atomic theory of matter

A

All substances are made up of particles called atoms

45
Q

What is an element

A

A pure substance made up of one type atom

46
Q

The periodic table is arranged by…

A

In order of the size of their atoms

47
Q

What are horizontal rows called

48
Q

Vertices rows are called…

49
Q

What are the 3 main sections of the periodic table made from

A

Metoloids
Metals
Non metals

50
Q

First 20 of the periodic table

A 
Hydrogen
Helium
Lythium
Beriliun
Boron
Carbon
Nitrogen 
Oxygen 
Florine
Neon
Sodium
Magnesium
Aliminium
Silicone
Phosphorous 
Sulphur 
Chlorine
Argon
Potassium
Calcium
51
Q

What is the symbol for hydrogen

52
Q

What is the symbol for helium

53
Q

What is the symbol for lithium

54
Q

What is the symbol for berilium

55
Q

What is the Symbol for boron

56
Q

What is the symbol for carbon

57
Q

What is the symbol for nitrogen

58
Q

What is the symbol for oxygen

59
Q

What is the symbol for florine

60
Q

What is it he symbol for neon

61
Q

What is the us boo for sodium

62
Q

What is the symbol for magnesium

63
Q

What si the symbol for aluminium

64
Q

What is the symbol for silicon

65
Q

What is the symbol for phosphorous

66
Q

What is the symbol for sulphur

67
Q

Watusi the symbol got clorine

68
Q

What is the symbol for argon

69
Q

What is the symbol for potassium

70
Q

What is the symbol for calcium

71
Q

What are molecule

A

Groups of 2 or more atoms that have bonded

72
Q

Gravitational potential energy

A

When you lift an object

73
Q

Solar energy

A

Uses solar cells to create electricity

74
Q

Chemical potential energy

A

Found in food and drinks. It acts as a source of energy for anything that is living

75
Q

Kinetic energy

A

Everything with potential to move

76
Q

Electromagnetic energy

A

Used to describe energies from space

77
Q

Elastic potential energy

A

Energy stored through stretching and squashing

78
Q

Sound energy

A

Vibrations going back and forth creating sound

79
Q

Electrical energy

A

Energy associated with electric charges. It’s at a standstill or moving

80
Q

Nuclear energy

A

A dangerous chemical reaction used to create electricity

81
Q

Thermal energy

A

Heat energy. Created by friction, burning or gas

82
Q

Biomass energy

A

Energy deprived from plants and animals

83
Q

Energy can not be…

A

Created or destroyed

84
Q

Energy efficiency is..

A

Calculation of the percentage of useful energy and non useful

Calculation
Output divided by input X 100

85
Q

Advantages of renewable energy

A

Sustainable

Environmentally friendly

86
Q

Disadvantages of renewable energy

A

Difficult to generate

Relies of weather

87
Q

Advantages of non renewable energy

A

Cheep

Easy availability

88
Q

Disadvantages of non renewable energy

A

Eventually runout

Damages the environment

89
Q

What are the 3 magnifications

A

10x4
10x10
10x100

90
Q

What is a solid to a liquid called

91
Q

What is a liquid to a gas called

A

Vaporisation

92
Q

What is a gas to a liquid called

A

Condensation

93
Q

What is a liquid to a solid called

A

Solidification

94
Q

What is a solid to a gas

A

Sublimation

95
Q

Why don’t solids diffuse

A

They are in a fixed position

96
Q

Do liquids diffuse

A

They diffuse slowly and don’t move very far

97
Q

Do gases diffuse

A

It diffuses easily because they move freely and quickly

Science States Of Matter (1 decks)

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