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Science > 7S,7I,7G Science Revision > Flashcards

7S,7I,7G Science Revision Flashcards

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1
Q

7S-What is a hazard?

A

Something that can cause harm within a lab.

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2
Q

7S-What is a risk?

A

Something dangerous that could happen because of a hazard.

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3
Q

7S-What are some common control measures?

A

Wear goggles, wear gloves, tie your hair back, keep objects in the centre of the table.

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4
Q

7S-What is a quantity?

A

Something that can be measured.

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5
Q

7S-What equipment do you use to measure length,liquid volume and mass?

A

Length-Ruler
Liquid volume- Measuring cylinder
Mass- Scale/Balance

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6
Q

7S-What should you do to make sure you measure the right amount?

A

Read your value with the equipment at eye level.

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7
Q

7S-What’s the difference between safety and roaring flame?

A

A safety flame is orange and a roaring flame is a loud blue flame. A safety flame is cooler than a roaring flame.

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8
Q

7S-What piece of equipment do we use to heat a substance?

A

A Bunsen burner.

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9
Q

7S-How do you measure the temperature of a substance?

A

Using a thermometer.

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10
Q

7S-What is the independent variable?

A

The variable that you change in an experiment.

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11
Q

7S-What is the dependent variable?

A

The variable that you measure in an experiment.

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12
Q

7S-What is the control variable?

A

The variable that you keep the same in an experiment.

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13
Q

7S-What is an anomaly?

A

A result that doesn’t fit the pattern in your experimental results.

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14
Q

7S-How do you calculate the mean?

A

Add up the values and divide this number by the number of values you added.

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15
Q

7S-What should a good graph include?

A

Labelled axis, points plotted as crosses, a title and everything is drawn in a pencil and a ruler.

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16
Q

7I-What is an energy store?

A

A way in which energy can be kept in a system.

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17
Q

7I-What are the six types of energy store?

A

Nuclear,gravitational,elastic,chemical,kinetic,thermal.

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18
Q

7I-How can we increase the energy in a kinetic,gravitational or chemical store?

A

Kinetic-move faster
Gravitational-lift the object higher
Chemical-eat food.

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19
Q

7I-What is an energy transfer?

A

A way of moving energy from one store to another.

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20
Q

7I-What are the five types of energy transfer?

A

Light,heat,forces,sound,electricity.

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21
Q

7I-What is energy measure in?

A

Joules (J)

21
Q

7I-What is meant by the conversation of energy?

A

That energy cannot be created or destroyed, only transferred from one store to another.

22
Q

7I-How can we find out how much energy is in our food?

A

In the energy section of the nutrition label on the food wrapper.

23
Q

7I-What happens if we consume too much or too little energy in our diet?

A

If we consume too much,we gain weight.
If we consume too little, we lose weight.

24
Q

7I-How do I use a bunsen burner safely?

A

Tie hair up,tuck in ties,keep on a safety flame when not in use.

25
Q

7I-What is a fuel?

A

A fuel is a store of chemical energy.

26
Q

7I-How are oil,coal and natural gas formed?

A

They are formed by dead animals or plants that have fossilised after being under intense pressure and heat for millions of years.

27
Q

7I-What do we mean when we say a fuel is non-renewable?

A

That the fuel will eventually run out.

28
Q

7I-What are biofuels and why are they renewable?

A

Biofuel are fuels that are made from plant or animal waste.They are renewable as the supplies of them never run out.

29
Q

7I-What do we mean by the term renewable?

A

Renewable energy resources are sources of energy that never run out.

30
Q

7I-What are the advantages of renewable energy sources?

A

That they never run out and they do not add to global warming.

31
Q

7I-What are the disadvantages of renewable energy?

A

They usually depend on the weather to work (wind and solar) or they are expensive to build (hydroelectric).

32
Q

7G-What is a physical substance?

A

Something which has both mass and a volume.

33
Q

7G-What is meant by mass and volume?

A

Mass is how heavy something is.
Volume is how much space something takes up.

34
Q

7G-What is meant by states of matter?

A

A state of matter is the form of a substance that can exist as either a solid,a liquid or a gas.

35
Q

7G-What are the properties of solids?

A

Solids have a fixed volume and shape.

36
Q

7G-What are the properties of liquids?

A

Liquids have a fixed volume, but no fixed shape. They can fow and take the shape of their containers.

37
Q

7G-What are the properties of gases?

A

Gases have no fixed shape and volume and they can be compressed into a smaller volume.

38
Q

7G-What is particle theory?

A

All matter is made up of particles. Particles experience forces of attraction keeping them together.

39
Q

7G-What are the forces of attraction like in a strong?

A

Strong

40
Q

7G-What are the forces of attraction like in a liquid?

A

Medium

41
Q

7G-What are the forces of attraction like in a gas?

A

Weak

42
Q

7G-What is a state change?

A

When a substance changes from one state to another.

43
Q

7G-What are the four types of state changes?

A

Melting, freezing, boiling, condensing.

44
Q

7G-What is a melting point?

A

The temperature at which a solid becomes a liquid.

45
Q

7G-What is a boiling point?

A

The temperature at which a liquid becomes a gas.

46
Q

7G-What observations did Robert Brown make?

A

Brown noticed that particles of pollen moved around randomly when placed in water.

47
Q

7G-What is Brownian motion?

A

The random motion of particles when suspended in a liquid or gas.

48
Q

7G-What is diffusion?

A

Diffusion is the ‘spreading out’ of particles in liquids and gases.

49
Q

7G-What states of matter can diffuse?

A

Liquid and gas particles.

50
Q

7G-What is meant by a high and low concentration?

A

Low concentration-area where there are a fewer number of particles.
High concentration-area where there are plenty of particles close together.

51
Q
A

Science (1 decks)

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