World Biomes

• The layers of the rainforest include the emergent, the canopy, the understory, and the forest floor.
• Hot deserts have very low precipitation, having less than 250mm of rainfall annually.
• Desert plants have adaptations such as spines instead of leaves to reduce water loss through transpiration.
• Tropical Rainforests are characterized by warm temperatures throughout the year with no distinct dry season.
• Rainforests are very hot yet humid.
• There is an abundance of plant life due to high levels of sunlight and nutrients from decaying vegetation.
• Coral reefs need water to be warm enough for photosynthesis and coral polyps to survive.
•  reef is made up of millions of coral polyps. These are tiny animals, but they contain plants called algae.
• Threats to deserts include desertification and overgrazing.
• Threats to tropical rainforest include deforestation and agriculture, which disrupts rain patterns.
• Threats to coral reefs include coral bleaching and ocean acidification, which is elevated CO2 levels.
• We conserve for rainforests by planting more trees and stop cutting as many.
• We conserve for coral reefs by avoiding touching the reefs and being a sensible snorkeler.
• We conserve for deserts by using less water, using less fertiliser, and using less pesticides.
• The enhanced greenhouse effect is heat getting trapped in the Earth.
• An eco system is a community of organisms and their physical environment.
• Zooxanthellae is a type of algae that lives in the tissues of corals.
• A reg is a stony plain.
• Hamadas are elevated plateaus of rock and stone.
• Overgrazing is when animals eat until no vegetation is left in an area.
• An erg desert is a large area covered by sand dunes.
• A coral polyp is a tiny, soft-bodied organisms related to sea anemones and jellyfish.