Daily Practice

GCSE Science

30th April 1991

5 questions · GCSE · 584 questions in this band

1
Biodiversity, Cycles and Human Impact
Explain why large-scale deforestation increases the concentration of carbon dioxide in the atmosphere.
2
Chemistry Required Practicals and Data Analysis
In the rate experiment where a cross disappears, why is the result subjective?
3
Atomic Structure and the Periodic Table
Explain, in terms of electrons, why reactivity decreases going down Group 7.
4
Using Resources
Name the four stages usually considered in a life cycle assessment of a product.
5
Using the Earth's Resources and Potable Water
Explain why potable water is not required to be chemically pure.

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