Which of the following best describes a food chain?

• A complex network of feeding relationships in an ecosystem

• The physical characteristics of an environment

• A linear sequence of organisms showing who eats whom

• The process of energy transfer between trophic levels

In a food web, which organisms are considered primary producers?

• Herbivores

• Carnivores

• Decomposers

• Photosynthetic organisms

Tags

NGSS.MS-LS1-6

Which of the following is NOT a biogeochemical cycle?

• Carbon cycle

• Nitrogen cycle

• Oxygen cycle

• Food cycle

Tags

NGSS.MS-LS2-3

What is the primary role of decomposers in an ecosystem?

• To produce oxygen through photosynthesis

• To consume other organisms for energy

• To break down dead organisms and return nutrients to the environment

• To regulate the population of predators

Tags

NGSS.MS-LS2-3

In the carbon cycle, where is the largest reservoir of carbon found?

• Atmosphere

• Oceans

• Fossil fuels

• Living organisms

Tags

NGSS.HS-ESS2-6

NGSS.HS-LS2-5

Which biome is characterized by low-growing plants and permanently frozen subsoil?

• Savanna

• Temperate deciduous forest

• Desert

• Tundra

Which of the following is an example of a biogeochemical cycle?

• Water cycle

• Rock cycle

Tags

NGSS.MS-ESS2-4

NGSS.MS-LS2-3

What is the primary role of bacteria in the nitrogen cycle?

• They consume nitrogen directly from the air

• They convert nitrogen into forms usable by plants

• They release nitrogen back into the atmosphere

• They store nitrogen in their bodies for long periods

Tags

NGSS.MS-LS2-3

Which terrestrial biome has the highest biodiversity?

• Tundra

• Temperate grassland

• Tropical rainforest

• Taiga

Tags

NGSS.MS-LS2-5

What is the main difference between a food chain and a food web?

• Food chains only include plants, while food webs include animals

• Food chains show energy flow, while food webs don't

• Food chains are linear, while food webs show interconnected feeding relationships

• Food chains are found in aquatic ecosystems, while food webs are found in terrestrial ecosystems

Tags

NGSS.MS-LS2-3