Environmental 5, 6, 7

Biotic factors of an ecosystem are:

• non-living things

• always plants

• living things

• soil

Which biome is characterized by low temperatures and low amounts of rainfall?

• tundra
• desert
• temperate deciduous forest
• tropical rain forest

Which biome, because of its climate, has the largest number of species of plants and animals?

• tundra
• desert
• tropical rainforest
• chaparral

Which biome contains large populations of grazing herbivores, few species of birds, and deep, rich soil?

• Boreal Forest

• Tundra

• Deciduous Forest

• Grassland

oxygen is a gas produced by _ and used by  _ 

• plants and animals 
• photosynthesis and carbon dioxide 
• animals and plants 
• carbon dioxide and photosynthesis

if there is a fire in a forest, there will be less _ in the environment?

• nitrogen
• oxygen

Which of the following removes carbon from the atmosphere?

• Combustion
• Respiration
• Photosynthesis
• Death

Plants use ____________ to make their own food

• Water

• Sunlight

• Carbon dioxide

• All of these

What does NOT produce carbon dioxide?

• Photosynthesis
• Burning Fossil Fuels
• Animal respiration
• Plants decaying

When humans EXHALE, we release __________________.

• Oxygen

• Carbon Dioxide

• Nitrogen

• Water