Daily Practice · GCSE Science

Daily Practice - GCSE Science

12th August 1997

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
A sample contains 90% of an isotope with mass number 10 and 10% of an isotope with mass number 11. Calculate the relative atomic mass, to 1 decimal place.
4
Using Resources
Explain why potable water is not the same as pure water.
5
Using the Earth's Resources and Potable Water
State what is meant by sustainable development.

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