P6 Science · Chapter 18brightbit.net/worksheets

Human Impact & Conservation

Name: ______________________Class: ________Date: ____________Score: ____ / 5

1.
Biodiversity refers to —
(a) The number of humans on Earth(b) The variety of living organisms in an ecosystem(c) The total mass of all plants on Earth(d) The number of endangered species
2.
Which is a major cause of biodiversity loss?
(a) Planting more crops of different types(b) Habitat destruction due to deforestation and urbanisation(c) Setting up nature reserves(d) Reducing the use of pesticides
3.
Which statement BEST explains why biodiversity is important for humans?
(a) It provides more jobs in tourism only(b) Diverse ecosystems provide clean air, clean water, food, medicines, and climate regulation(c) It makes the natural world look more attractive(d) Fewer species means less competition for human resources
4.
A nature reserve (protected area) helps conserve biodiversity by —
(a) Allowing unlimited hunting and logging(b) Providing safe habitats for wildlife free from human disturbance(c) Encouraging rapid urbanisation inside(d) Introducing new non-native species freely
5.
Invasive species threaten biodiversity because they —
(a) Are too small to compete with native species(b) Often out-compete native species and disrupt the ecosystem's balance(c) Only affect plants, not animals(d) Are introduced to help native species

Answer key — P6 Science: Human Impact & Conservation

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1.(b) The variety of living organisms in an ecosystem
2.(b) Habitat destruction due to deforestation and urbanisation
3.(b) Diverse ecosystems provide clean air, clean water, food, medicines, and climate regulation
4.(b) Providing safe habitats for wildlife free from human disturbance
5.(b) Often out-compete native species and disrupt the ecosystem's balance

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