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8Ne Year 8 Science > 8A Building Science Skills > Flashcards

8A Building Science Skills Flashcards

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1
Q

Define the term precise.

A

Measurements that are close to the mean value.

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2
Q

Define the term accuracy.

A

How close an experimental answer is to the true value.

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3
Q

What does reproducible mean?

A

Consistent results using the same method.

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4
Q

Name a piece of apparatus that can be used to measure volume.

A

Measuring cylinder.

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5
Q

Why is using a 25 cm3 measuring cylinder better than a 100 cm3 one, to measure 18 cm3?

A

It would give a more accurate volume.

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6
Q

Describe what repeated results that had high precision would look like.

A

All the results would be similar.

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7
Q

How do external jaws on Vernier callipers make them accurate than a ruler?

A

It ensures the object cannot move when measuring.

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8
Q

What is the resolution of the ruler in your pencil case?

A

1mm.

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9
Q

What is used to draw a scientific diagram?

A

A pencil.

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10
Q

How is a Bunsen burner represented in a scientific drawing?

A

An arrow.

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11
Q

Why do scientists construct scientific diagrams?

A

To understand how equipment must be set up for an experiment.

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12
Q

What should a scientific drawing not include?

A

No shading.

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13
Q

Why are scientific diagrams used instead of pictures?

A

The diagram has more detail and you can see all of the equipment.

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14
Q

How can we make sure scientific diagrams are as clear as can be?

A

Draw separate lines with a ruler for labels, draw apparatus as a cross section, draw it as large as necessary.

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15
Q

One end of the label line has the name of the piece of apparatus. Where does the other end of the label line go?

A

Touching the piece of equipment it labels.

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16
Q

What is something that can be changed and measured?

A

A variable.

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17
Q

Which variable is measured during an experiment?

A

Dependent.

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18
Q

Which variable is changed during an experiment?

A

Independent.

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19
Q

Which variable(s) is kept the same during an experiment?

A

Control.

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20
Q

Why is it important to keep control variables the same during an experiment?

A

To make sure they don’t affect the outcome of the experiment.

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21
Q

When dropping a ball from different heights to see how high it bounces, what is the IV?

A

The height the ball is dropped from.

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22
Q

When timing how long it takes for different volumes of fuel to burn what is the DV?

A

How long it takes for the fuel to burn.

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23
Q

Define the term valid.

A

An experiment that measures what it is supposed to.

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24
Q

What is a prediction based on?

A

Data collected from observations.

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25
Q

What is often used to test a hypothesis?

A

An experiment.

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26
Q

Practical predictions suggest a relationship between which variables?

A

Independent and Dependent.

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27
Q

Questions that help come up with a hypothesis are often based on what?

A

Observations.

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28
Q

Suggest a hypothesis for the following experiment - using different sizes of paper towel to soak up water.

A

Different sizes of paper towel can soak up different volumes of water.

29
Q

Give a prediction for the hypothesis – the amount of water a paper towel can soak up depends on the size of the paper towel.

A

More water is soaked up by a larger paper towel.

30
Q

Pick the best hypothesis for the experiment – “heating up different volumes of water until the water starts to boil”.

A

The volume of water affects the boiling point of water.

31
Q

Which comes first when following the scientific method – hypothesis or prediction?

A

Hypothesis.

32
Q

What is the purpose of a method?

A

To describe how an experiment should be done.

33
Q

What should also be included with a list of instructions in the method?

A

Numbered points or a diagram.

34
Q

If a method is well planned, what are other scientists able to do?

A

Complete the experiment and get a similar outcome.

35
Q

How many steps are there in planning an experiment?

A

6.

36
Q

True or False: “if an experiment is well planned the data produced is more likely to be precise and accurate”

A

TRUE.

37
Q

Why is a risk assessment produced before an experiment is carried out?

A

To identify if there are any possible hazards and how to minimise them.

38
Q

What are the two types of error?

A

Random and Systematic.

39
Q

Measuring from the end of a ruler instead of from 0 is an example of which type of error?

A

Systematic error.

40
Q

What is a unit of measurement?

A

What we measure a quantity in.

41
Q

What is the standard index unit for temperature?

A

Degrees Celsius.

42
Q

How do you convert m to km?

A

Divide by 1000.

43
Q

How do you convert km to dm?

A

Multiply by 10,000.

44
Q

Convert 345 kilometers to metres.

A

345,000 m.

45
Q

Convert 10 milliamps into amps.

A

0.01 A.

46
Q

When the units get larger, what happens to the size of the number?

A

It gets smaller.

47
Q

When the numbers get bigger what happens to the units?

A

It gets bigger.

48
Q

Why are results organised into results tables?

A

To analyse data and determine if a hypothesis is correct.

49
Q

In which column of the table does the independent variable go in?

A

The first column.

50
Q

In which column of the table does the dependent variable go in?

A

The second column.

51
Q

Why do units go in the header of the table?

A

To avoid writing them out multiple times.

52
Q

How should the values of a continuous independent variable be organised?

A

Ascending order (smallest to biggest).

53
Q

Calculate the mean of the following: 12s, 19s, 10s.

A

11s.

54
Q

Why are tests repeated?

A

To calculate a mean.

55
Q

True or false: “units are not needed when drawing a graph”

A

FALSE.

56
Q

What is the name of a result that should be ignored when drawing the line of best fit?

A

Anomalies.

57
Q

Which variable goes on the horizontal axis?

A

Independent.

58
Q

Which variable goes on the vertical axis?

A

Dependent.

59
Q

What type of variable is time?

A

Continuous.

60
Q

When should a bar chart be plotted?

A

If the data is categoric.

61
Q

A pie chart is used to show what type of data?

A

Categoric.

62
Q

How much of the graph paper should a graph take up?

A

At least half.

63
Q

Define the term gradient.

A

The numerical relationship between variables.

64
Q

What is a positive correlation?

A

Both variables increase and the line of best fit goes up.

65
Q

What does ‘interpreting relationships’ mean?

A

Finding patterns in data on a graph or chart.

66
Q

What should a conclusion include?

A

It will quote data from the results table and describes the relationship between variables.

67
Q

How is the gradient of a line calculated?

A

Change in y/ change in x.

68
Q

Describe the relationship between variables A & B as shown by
a) the yellow line
b) the blue line
c) the red line

A

A) Positive correlation
B) As A increases, B increases, at a decreasing rate.
C) As A increases, B increases, at an increasing rate.

8Ne Year 8 Science (10 decks)

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