Year 7 Science · Unit 1 · Lesson 05

Microorganisms

Challenge Worksheet

Name

Date

Class

Learning Goals

Evaluate a scientific claim about antibiotic use using lesson knowledge.
Identify what is supported by evidence and what is misleading in a real-world claim.
Propose the type of evidence needed to test a scientific claim.

Go Deeper

Evaluate the claim

Someone claims…

"Antibiotics are the best way to treat any infection. They kill bacteria AND viruses, so doctors should prescribe them for the flu, colds, and bacterial infections equally. If you're sick, you should always ask your doctor for antibiotics to get better faster."

(a) What part of this claim is supported by science you have learned in this lesson?

Challenge 2 marks

(b) What is misleading or scientifically incorrect about this claim? Explain why.

Challenge 2 marks

(c) What evidence or extra information would you need to decide whether antibiotics should be prescribed in a specific case of illness?

Challenge 2 marks

Show What You Know

1. Plasmodium is the protist that causes malaria and is spread by mosquitoes. It is one of the deadliest pathogens in human history. Using what you know about protists, explain why Plasmodium is classified as a protist and NOT as a bacterium or a virus.

Challenge 3 marks

2. A microbiologist discovers a new microscopic organism in a soil sample. It is single-celled, has no nucleus, and can be killed by antibiotics. Identify which microorganism group this belongs to and justify your answer using two pieces of evidence from the description.

Challenge 4 marks

Wrap Up

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