Year 8 Science · Unit 4 · Lesson 1

What Counts as Scientific Data?

Challenge Worksheet

Name

Date

Class

Learning Goals

Critically evaluate whether a claim meets the standards for scientific data.
Apply criteria for testability, objectivity, and reproducibility to real-world examples.
Construct a reasoned argument about the reliability of scientific versus non-scientific evidence.

Warm Up

Odd one out

Circle the item that does not belong in each group. Then explain why it doesn't fit in the answer column.

#	Group	Your answer (odd one + reason)
1	Objective Measurable Reproducible Interesting
2	pH of solution "It smelled weird" Temperature in °C Mass in grams
3	Peer-reviewed journal Government database Uncle's advice CSIRO report
4	Testable Falsifiable Supported by evidence Based on tradition

Go Deeper

Evaluate the claim

Someone claims...

"A viral TikTok video shows a person dissolving an egg in vinegar overnight. The caption says 'SCIENTISTS CONFIRM: vinegar removes calcium from bones — stop drinking it immediately!' The video has 4 million views and thousands of comments saying 'this is proof!' The creator has no scientific qualifications."

(a) State at least two criteria that genuine scientific data must meet. Does the viral video's evidence meet these criteria? Explain.

Challenge 3 marks

(b) Why is the number of views and comments not evidence that the claim is scientifically valid? Use the concepts of objectivity and peer review in your answer.

Challenge 3 marks

(c) Design a simple investigation that would actually test whether drinking vinegar affects bone calcium levels. What data would you collect, and what would make it scientific?

Challenge 4 marks

Wrap Up

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