7.1 The ecosystems of the earth

What is an ecosystem?

• An environment that supports life

• A type of weather pattern

• A man-made structure

• A type of animal

What are the two main factors that make up an ecosystem?

• Living and non-living factors

• Hot and cold temperatures

• Day and night cycles

• Land and water areas

What is biodiversity?

• A measure of the biological variety of an area

• The amount of water in a desert

• A type of plant species

• The number of predators in an ecosystem

Which ecosystem has very high biodiversity?

• Temperate woodlands

• Deserts

• Tropical rainforests

• Coral reefs

What is a characteristic of deserts?

• Very dry areas with little water

• Low temperatures all year round

• High biodiversity

• Constant rainfall throughout the year

What is a characteristic of temperate woodlands?

• Temperature and light levels change a lot during the year

• Always have plenty of sunlight and warmth

• Have very few plant and animal species

• Are found in hot deserts

What percentage of the Earth's surface is covered with water?

• 90%

• 71%

• 50%

• 30%

Where are coral reefs found?

• Cold, polluted, deep oceans

• Tropical rainforests

• Warm, clean, relatively shallow seas

• Freshwater rivers and lakes

What is the biosphere?

• A type of coral reef

• The Earth itself, known as the biosphere

• A type of desert ecosystem

• A man-made structure

What are abiotic factors in an ecosystem?

• The number of plant species

• The amount of sunlight

• Living factors such as food supply and predators

• Non-living factors such as soil, temperature, and water supply