Daily Practice

GCSE Science

21st January 1991

5 questions · GCSE · 584 questions in this band

1
Variation, Evolution and Selection
Define mutation.
2
Ecology
Explain why deforestation to create land for cattle grazing can reduce biodiversity.
3
Ecosystems, Adaptation and Feeding Relationships
A student places ten 1 m x 1 m quadrats at random across a school field of area 3000 m2 and counts a total of 45 dandelions across all ten quadrats. Estimate the total number of dandelions on the field.
4
Biodiversity, Cycles and Human Impact
A peat bog covered an area of 850 hectares in 2015. By 2025, drainage for farmland had reduced the peat bog to 680 hectares. Calculate the percentage decrease in the area of the peat bog.
5
Chemistry Required Practicals and Data Analysis
Name one way to make a rate of reaction experiment more valid rather than simply more precise.

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