MEDIUM
Lower Secondary Stage 7
IMPORTANT
Earn 100

Which do you think is smaller, bacteria or yeast? Give your reasoning.

Important Questions on Microorganisms and Disease

MEDIUM
Lower Secondary Stage 7
IMPORTANT
Which do you think are smaller, bacteria or viruses? Give your reasoning.
HARD
Lower Secondary Stage 7
IMPORTANT
Why are viruses are not like all other organisms?
MEDIUM
Lower Secondary Stage 7
IMPORTANT

The images given are not taken with a light microscope. Find out what kind of microscope has been used.

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MEDIUM
Lower Secondary Stage 7
IMPORTANT
Why was an electron microscope been used and not a light microscope?
MEDIUM
Lower Secondary Stage 7
IMPORTANT

Use the evidence in figure 2.6 to say which of the soups has gone bad.

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MEDIUM
Lower Secondary Stage 7
IMPORTANT
Describe two nineteenth-century ideas to explain why soup goes bad.
EASY
Lower Secondary Stage 7
IMPORTANT
Explain why shall we paint the classroom blue? Is not a scientific question.