Ecosystem Cycles

What part of the water cycle does this picture show?

• condensation
• precipitation
• evaporation

Which best explains why runoff is important?

• It returns water to other locations on Earth
• It increases the chance of flooding
• It makes evaporation occur faster
• It increases condensation

What does groundwater do?

• It sends water to our buildings, houses, and water transplant places
• to the sky
• to the sun
• To the Earth's surfaces

Plants and animals need nitrogen to make __________.

• Protein
• Carbohydrates
• Lipids
• Minerals

Plants and animals cannot use nitrogen directly from the air.

• True
• False

What converts nitrogen into a useable form for plants and animals?

• bacteria
• fungi
• rain

After plants and animals contain nitrogen, what puts it back into atmosphere and soil?

• decomposition
• precipitation
• condensation
• bacteria

In the energy pyramid here, which organisms have the most energy available?

• Producers
• Carnivores
• Herbivores
• Top Predator

In the energy pyramid below, which organism has the least amount of energy available?

• Producers
• Herbivores
• Carnivores
• Top Predator

All food webs and food chains begin with _________________.

• primary consumer
• producers
• secondary consumers
• predators