Daily Practice · GCSE Science

Daily Practice - GCSE Science

25th December 1996

5 questions · GCSE · 584 questions in this band

1
Ecology
Give one example of a biotic factor that could affect a population of rabbits.
2
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.
3
Biodiversity, Cycles and Human Impact
Explain why large-scale deforestation increases the concentration of carbon dioxide in the atmosphere.
4
Chemistry Required Practicals and Data Analysis
In the rate experiment where a cross disappears, why is the result subjective?
5
Atomic Structure and the Periodic Table
Explain, in terms of electrons, why reactivity decreases going down Group 7.

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