Daily Practice · GCSE Science

Daily Practice - GCSE Science

14th November 1998

5 questions · GCSE · 584 questions in this band

1
Ecosystems, Adaptation and Feeding Relationships
In a grassland food chain, the biomass of grass available is 8400 kg and the biomass transferred to the rabbits that eat it is 940 kg. Calculate the percentage efficiency of biomass transfer from grass to rabbits, to 3 significant figures.
2
Biodiversity, Cycles and Human Impact
Explain why large-scale deforestation increases the concentration of carbon dioxide in the atmosphere.
3
Chemistry Required Practicals and Data Analysis
In the rate experiment where a cross disappears, why is the result subjective?
4
Atomic Structure and the Periodic Table
Explain, in terms of electrons, why reactivity decreases going down Group 7.
5
Using Resources
Name the four stages usually considered in a life cycle assessment of a product.

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