Year 8 Science · Unit 1 · Lesson 18

Investigating Living Systems

Foundation Worksheet

Name

Date

Class

Learning Goals

Identify the key steps in a scientific investigation about a living system
Recall the difference between primary data and secondary-source data
Explain why conclusions must come from evidence, not just from expectations

Warm Up

Order the steps

Number the steps from 1 (first) to 6 (last) to show the correct order of a living-systems investigation.

Order (1–6)	Step
	Write a conclusion based on the evidence from your data
	Ask a testable living-systems question
	Find patterns or trends in the data
	Make a reasoned prediction
	Collect useful data using safe and fair steps
	Plan a clear method

Your Turn

Fill the gap

Choose the correct word from the word bank to complete each sentence. Two words will not be used.

investigation prediction method data pattern conclusion evidence decoration opinion

A scientific is a planned way to answer a question using evidence. The first step is to ask a testable question and make a a statement about what you think may happen and why.

After planning a safe and fair , you collect information from your investigation or from secondary sources. You then look for a or trend in the results.

A scientific must be based on from the data, even if the result is different from the original prediction. It should never be based only on .

Show What You Know

1. A student measuring pulse rate before and after a short run collects these results: resting = 72 bpm, after run = 118 bpm, after recovery = 80 bpm. Identify the pattern in this data and write a conclusion that is based on evidence rather than just expectation.

Recall 2 marks

2. What is the difference between primary data and secondary-source data? Give one example of each in the context of investigating a living system.

Recall 2 marks

Wrap Up

In one sentence, what was the main idea of this lesson?