Daily Practice · GCSE Science

Daily Practice - GCSE Science

19th April 1997

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
Write the electronic structure of an atom with 12 electrons.
5
Using Resources
State the two main steps used to produce potable water from a fresh water source.

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