What is the range of plants and animals in an ecosystem known as?
Adaptation
Biodiversity
Diversity
What is meant by the term extinction?
When numbers of an organism decrease but the species recovers
When a species is wiped out forever
When a species decreases in numbers
What does deforestation mean?
Planting new tress
Cutting trees down
Creating forests
What does deforestation lead to?
Reduced number of habitats and decreased biodiversity
Increased number of habitats and decreased biodiversity
Increased number of habitats and increased biodiversity
Why is the human population growing each year?
More births and more deaths
Less births and more deaths
More births than deaths
Eutrophication is caused by which of these?
Antibiotics
Pesticides
Fertilisers
What happens to the oxygen levels during eutrophication?
Increase
Stay the same
Decrease
Which of these is a greenhouse gas?
Methane
Hydrogen
Ammonia
Deforestation followed by burning of the trees will release which gas into the atmosphere?
Carbon dioxide
Oxygen
Which of these ecosystems would have the highest level of biodiversity?
Polar ocean
Desert
Forest