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Science > Year 7 End Of Year > Flashcards

Year 7 End Of Year Flashcards

1
Q

What is a independent variable

A

The variable we are changing

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2
Q

What is a dependent variable

A

The variable we are measuring

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3
Q

What is Categoric data

A

Data that is described by a label

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4
Q

What if discrete data

A

Data that is a whole numbee

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5
Q

What is ordered data

A

Data that can be ordered but not put into an actual number

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6
Q

What is continuous data

A

Data that could have any number of

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7
Q

When do you plot a line graph?

A

When you have 2 sets of continuous data

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8
Q

How do you find the gradient

A

Changing in y
——————-
Changing in x

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9
Q

What is a hazard

A

The danger associated with a particular object

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10
Q

What is a risk

A

The chance of something happening

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11
Q

How do you use a Bunsen burner?

A

Place the Bunsen burner onto a heatproof mat

Make sure your gas tap is off when connecting the tube

Make sure your air hole is closed when lighting the Bunsen burner

Turn your gas tap on

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12
Q

Astronomy

A

The study of objects (such as starts,planets,comets and galaxies) beyond the earths atmosphere

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13
Q

What is the geocentric model

A

Where the sun is in the centre and all the planets orbit around it

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14
Q

What is the heliocentric model

A

Where the earth is in the centre and there are 5 planets orbiting around it

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15
Q

What is mass

A

Mass is the amount of matter an object contains

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16
Q

What is weight

A

Weight is the force of gravity acting on an object

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17
Q

What is gravitational field strength

A

10N/KG

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18
Q

Formula for finding weight

A

mass x gravitational field strength

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19
Q

What is the force of gravity

A

All objects have a force that attracts them towards each other

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20
Q

How do starts generate heat

A

By nuclear fusion

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21
Q

How to planets be seen

A

Because they reflect light form their star

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22
Q

What is our nearest star

A

The sun

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23
Q

Why do we orbit the sun

A

We orbit the sun due to gravity

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24
Q

How long does it take for the moon to rotate around the earth once

A

28 days

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25
Q

How much of the moon is lit

A

Only one half

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26
Q

Evaporation

A

Evaporation occurs when particles in a liquid escape to form a vapour

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27
Q

When does evaporation usually occur

A

Evaporation can occur at any temperature but its fastest at liquids boiling point

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28
Q

What is everything made out of

A

Atoms

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29
Q

What is an element

A

When a substance only has one atom

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30
Q

What is a pure substance

A

When the substance only has 1 type of element in it

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31
Q

What is a compound

A

2 or more elements chemically joined

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32
Q

What is an element

A

Made of 1 atom only

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33
Q

What is a mixture

A

2 or more elements and/or compound not joined together

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34
Q

Molecules

A

2 or more non metals chemically joined

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35
Q

What is diffusion

A

Diffusion is the movement of particles that allows them to spread out and mix with other particles

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36
Q

Shen does diffusion usually occur

A

Diffusion occurs in liquids and gasses but hardly at all in solids

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37
Q

What is solubility

A

Mass of solute that can dissolve in the amount of solvent given at a certain temperature

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38
Q

What is a solute

A

The substance being dissolved

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39
Q

What is a solvent

A

The substance doing the dissolving

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40
Q

What is a solution

A

A mixture of the solute+solvent

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41
Q

Soluble

A

A substance that dissolves in the solvent

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42
Q

Insoluble

A

The substance that cannot dissolve in a solvent

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43
Q

What is crystallisation

A

Separating a solid from a solution instead of evaporating the solution you can evaporate some of the solvent letting the solute slowly crystallise

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44
Q

Filtration

A

To separate an insoluble,you should pour onto filter paper and separate particles from the solution

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45
Q

Distillation

A

You can evaporate and then condense the solvent.This gets rid of the solute which leaves the solvent behind

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46
Q

MRS GREN

A

Movement
Respiration
Sensitivity
Growth
Reproduction
Excretion
Nutrition

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47
Q

Excretion

A

This is the removement of waste produced by a individual

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48
Q

Movement

A

This is a change of position in order to respond to surroundings

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49
Q

Respiration

A

This is a release of energy from food or stored chemicals

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50
Q

Sensitivity

A

Reacting to the surroundings

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51
Q

Growth

A

Growing up

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52
Q

Reproduction

A

Creating new individuals

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53
Q

Nutritions

A

The intake of food

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54
Q

Nucleus

A

Controls activity of the cell

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55
Q

Cell membrane

A

Surrounds the cell

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56
Q

Cytoplasm

A

Carey out activities of the cell

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57
Q

Cell wall

A

Supports cell to stop from bursting

58
Q

Permanent vacuole

A

Storage of waste substance

59
Q

Chloroplast

A

Traps light energy to make food for the plant

60
Q

Mitochondrien

A

The plant and animal cell

61
Q

Muscle cell

A

Relaxes and controls movements around the body

62
Q

Where is a muscle cell found

A

In the heart and muscles

63
Q

Red blood cell

A

Carries oxygen and blood around the body

64
Q

Where is a red blood cell found

A

Found In the circulatory system

65
Q

Nerve cell

A

Sends and receives messages from the brain

66
Q

When is the nerve cell found

A

Found in the brain,spinal cord and nervous system

67
Q

Cilated cell

A

Helps to wave and move things and traps dust from getting into body

68
Q

Where is a cilated cell found

A

Found in the lining of your nose

69
Q

Egg cell

A

To develop into a foetus and collect genes from the mother and pass them onto child

70
Q

Where is the egg cell found

A

In the ovaries

71
Q

Palisade cell

A

Carry out photosynthesis for the plant

72
Q

Where is a palisade cell found

A

Found in top half of the leaf

73
Q

Sperm cell

A

To fertilise a woman’s egg cell and soon develop a foetus

74
Q

Where is a sperm cell found

A

Found in a males testicles

75
Q

Root hair cell

A

Absorbs water and nutrients from the soil

76
Q

Where is a root hair cell found

A

Fount in roots of a plant

77
Q

What is a unicellular organism

A

A unicellular organism is a cell that is made of 1 cell.Found in animals or plants

78
Q

Good vacuole

A

Helps digest food

79
Q

Coneradictile vacuole

A

Vacuole helps remove water and waste

80
Q

Pseudopod

A

Helps engulf the food

81
Q

Energy

A

The ability to do ‘work’ this involves movement of some sorr

82
Q

Can energy be created

A

No energy can only be changed/converted/transferred to another form

83
Q

How can kinetic energy be changed

A

By speeding up the object or down

84
Q

How can chemical energy be changed

A

Can be changed by chemical bonds being made or broken

85
Q

How can thermal energy be changed

A

Changed by material warming or cooling

86
Q

How can gravitational potential energy be changed

A

Changed by massive objects moving closer or further apart

87
Q

How can nuclear energy be changed

A

Can be changed by fusion

88
Q

How can vibrational energy be changed

A

Can be changed by the amplitude of vibration increasing/decreasing

89
Q

How can magnetic energy. Be changed

A
90
Q

How can elastic potential energy be changed

A

Changed by squeezing/relaxing/or stretching object

91
Q

How can electrostatic energy be changed

A

Changed by changing the distance between the objects

92
Q

What are energy pathways

A

Energy pathways are how energy is transferred

93
Q

How can you mechanically transfer energy

A

When a force moves through a distance

94
Q

How can you electrically transfer energy

A

When a charge moves through a potential difference

95
Q

How can energy be transferred by heating

A

When the temperature difference occurs

96
Q

How can energy be transferred by radiation

A

Light and sound

97
Q

What are stores measured in

A

Joules

98
Q

What are pathways measured in

A

Watts

99
Q

What is absolute zero

A

When atoms and molecules posses some kinetic energy and they freeze until the molecules are completely stationary.This is absolute zero which is 273* Celsius

100
Q

What is conduction

A

Conduction is like pass the punch.Some materials pass on the kinetic energy better than others.The best conductors are metals as they have free electrons to move along the material

101
Q

What is convection

A

Convection is warmer air rising as you transfer heat

102
Q

Why does warm air rise

A

Warm air rises because it is less dense

103
Q

What is infrared radiation

A

Is a form of electromagnetic spectrum.It does not need anything else to transfer it as it travels in invisible waves

104
Q

Example of infrared radiation

A

The sun

105
Q

Why do solids melt

A

Solids melt because the particles gain energy and move further apart

106
Q

Why do liquids freeze

A

Liquids freeze because the particles lose energy and move closer together

107
Q

Why do gasses condense

A

The particles lose energy and move closer together

108
Q

Why do liquids evaporate

A

Because the particles gain energy and move further apart

109
Q

What does DNA stand for

A

Deoxyribonucleic acid

110
Q

What Is DNA made out of

A

Long strands connected by an acid to create a double helix

111
Q

Where is DNA found inside a cell

A

DNA is found inside the nucleus

112
Q

What is DNA called when it winds up tight

A

A chromosome

113
Q

What is a gene

A

A gene is the set of instructions to posses a particular trait

114
Q

Inheritance characteristics

A

The features we inherit from our genes

115
Q

What is an allele made out of

A

A moms and dads feature paired

116
Q

Dominant allele

A

Allele will express itself which means it will show itself regarding whether there is a recessive allele or not

117
Q

Recessive

A

Allele will only show itself if it has a recessive allele gene

118
Q

Why are fatal diseases still around if they kill people

A

Adults with the desease pass it on to their children

119
Q

Chromosomes

A

46 chromosomes in a nucleus
23 pairs
All the chromosomes make up a cells genome

120
Q

What is the circulatory system

A

Transports blood around the body,oxygen and glucose too

121
Q

What is the main organ of the circulatory system

A

The heart because is sends blood through your body through tube like organs called blood vessels

122
Q

What is the nervous system

A

Helps the organism to respond to the environment around it

123
Q

What is the job of the lungs

A

The job of the lungs is to exchange gases

124
Q

What is a wave

A

A wave is a transfer of energy

125
Q

What do all waves require to travel

A

A medium

126
Q

What is a medium

A

A solid liquid or gas

127
Q

What are oscillations

A

The points in sound waves

128
Q

What are examples of transverse waves

A

Water ripples
Light
Slinky rope

129
Q

What are longitudinal waves

A

Longitudinal waves consist of squashes and stretches which travel outward

130
Q

What is the amplitude of a wave

A

The maximum displacement of a point on a wave away from its undisturbed position

131
Q

What is the wavelength

A

Wavelength is the distance between the two consecutive crests our troughs

132
Q

What is the frequency of a wave

A

The number of waves passing a point each second

133
Q

What is the wave speed

A

The speed at which energy is transferred through the medium

134
Q

What is thermal energy

A

Any object with a temperature

135
Q

What is kinetic energy

A

Any object that is moving

136
Q

What is gravitational potential

A

Objects at a height above the ground

137
Q

What is elastic potential energy

A

Objects that are stretched or compressed

138
Q

What is chemical energy

A

Anything that has a chemical energy store

139
Q

What is nuclear energy

A

Energy that is stored in the nucleus

140
Q

What is magnetic potential energy

A

When two magnets are held close together

141
Q

What is electrostatic potential

A

When charges are close together

Science (2 decks)

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