Lesson 3-4: Interactions & Cycling of Matter in an Ecosystem

What eats only other consumers?

• Carnivores

• Omnivores

• Herbivores

• Scavengers

What word describes how an organism interacts/functions in its ecosystem?

• Population

• Web

• Bonding

• Niche

What type of organism recycles dead organic matter?

• Scavenger

• Producer

• Decomposer

• Predator

What is more realistic in nature?

• Food webs

• Food chains

What describes an organism's level in the food web?

• Pyramid scheme

• Trophic levels

• Food chains

• Numbers

What type of organism is in the first trophic level?

• Tertiary consumer

• Secondary consumer

• Primary consumer

• Producer

Approximately how much energy gets passed from one trophic level to the next?

• 1%

• 5%

• 10%

• 20%

Biogeochemical cycles exist because

• Atoms cannot be created or destroyed

• The sun heats the earth

• Human activity

• Water and carbon

Which cycle is involved with the Earth's hydrosphere?

• Nitrogen Cycle

• Oxygen Cycle

• Carbon Cycle

• Water Cycle

What two processes RELEASE carbon dioxide (CO2) into the atmosphere? (pick two)

• Photosynthesis

• Burning of fossil fuels

• Cellular Respiration

• Evaporation