Recording results 1: Tables and bar charts

Question 1

Repeated readings - How should you show them in a table?

Answer 1

If readings are repeated there may be more than one column or row, one for each repeated reading and one for the mean (average).

• Units are always written in the heading of the column or row and not with each reading.

Question 2

what are the rules of drawing a table?

Answer 2

• Tables have two or more columns or rows.
• The independent variable is always in the first (left-hand) column or the top row.
• The dependent variable is recorded in the right-hand column or second row.

If readings are repeated there may be more than one column or row, one for each

Question 3

Bar charts:

Good features are?

Answer 3

Dependent variable - vertical axis (y axis)

Independent variable - horizontal axis (x axis)

Question 4

answer for bar chart

Answer 4

Volume (y axis)

Distance from sound source (x axis)

Question 5

Why do we use bar charts and graphs

Answer 5

Bar charts and graphs are useful to make it easier to interpret the results of an investigation.

Question 6

What are the features of a good bar chart

Answer 6

7 features:

1) Dependent variable on vertical (y axis)
2) Independent variable on horizontal (x axis)
3) Title
4) Label axes
5) Scale on vertical axis
6) Category names on x axis
7) Bars drawn accurately

Question 7

Edward hangs a spring from a bar and fixes a cup on the end. He adds marbles to the cup. Each time he adds a marble, he measures the length of the spring. He records his results in his notebook. 0 marbles = 5.0 cm, 1 marble = 5.4 cm, 2 marbles = 5.8 cm

Answer 7

show these results in a table

Question 8

The table shows the results from an investigation.

Answer 8

The bar chart shows some of the results:

1) label the axes

2)

Question 9

what is another way of showing your results

Answer 9

Graphs - draw the dots and then join them up to make a line or curve

Question 10

The features of a good graph?

Answer 10

1) Dependent variable on vertical (y axis)
2) Independent variable on horizontal (x axis)
3) Title
4) Label axes
5) Scale on axis
6) Line or curve through points
7) points drawn accurately

Question 11

Have a look at page 18 in the ISED revision book and learn how to draw a graph from the table of results

Answer 11

draw neatly - check which is the dependent and which is the independent variable

Question 12

Look at page 19 for points that dont fit the pattern

Answer 12

circle the point that doesnt fit the pattern

Question 13

Read page 20 - about interpreting graphs

Answer 13

learn how to predict values and read values from a graph