Y9: Describing Trends Revision

• Science
• Lower Secondary (Key Stage 3)

Y9: Graphs Revision

We like to display data using graphs because it is easier to see patterns on a graph.

We need to be able to describe the patterns that we see.

In this graph we can see that the general pattern in that the graph gets higher.

In science, instead of saying 'gets higher' we would say 'increases'.

In this graph we can see that the general pattern in that the graph gets lower.

In science, instead of saying 'gets lower' we would say 'decreases'.

What is the general trend in this graph?

1. Increasing
2. Decreasing

What is the general trend in this graph?

1. Increasing
2. Decreasing

What is the general trend in this graph?

1. Increasing
2. Decreasing

What is the general trend in this graph?

1. Increasing
2. Decreasing

What is the general trend in this graph?

1. Increasing
2. Decreasing

When we are asked to describe a trend, we need to give information about both variables on the graph.

We would say, 'as .................... increases, ................... increases/decreases'.

On this graph, as force increases, the length of the spring increases too.

Fill the blank.

As time increases, the volume of gas                      .

increases

decreases

Finish the sentence: As height increases,

Finish the sentence: As time increases,

Describe the trend on this graph.

Sometimes there is more than one trend. and we need to give more detail.

Trend 1: As temperature increases, enzyme activity increases.

Trend 2: At higher temperatures, enzyme activity rapidly decreases.

Describe the trends in this graph.

Describe the trends in this graph.

Describe the trends in this graph.

To perfect our answer we can use the data (numbers) on the graph to make accurate statements.

Here we would say:

As temperature increases, enzyme activity increases up to 70 C. After 70 C enzyme activity decreases rapidly.

°

°

At what time does volume of gas level off?

1. 15 seconds
2. 25 seconds
3. 30 seconds
4. 40 seconds

Describe the trend(s) on this graph, include data (numbers).

At what pH does rate of reaction peak?

1. 0
2. 1
3. 2
4. 3

Describe the trend(s) on this graph, include data (numbers).

At what temperature does rate of reaction peak?

1. 15
2. 28
3. 37
4. 50

Describe the trend(s) on this graph, include data (numbers).