7th Grade Science Exam

Biomes are:

• Ecosystems linked up to form larger areas with similar characteristics.

• Larger parts of land and water to make an ecosystem.

• Ecosystems linked up to form larger areas with different characteristics.

Desert, Rain Forest and Prairie are examples of:

• Biomes

• Ecosystems

• Environments

An organism that can make its own food is called a

• consumer

• producer

• decomposer

• scavenger

Tags

NGSS.MS-LS1-6

In which process do producers use carbon from carbon dioxide to produce other carbon-containing molecules?

• nitrogen cycle

• precipitation

• water cycle

• photosynthesis

Tags

NGSS.MS-LS1-6

A group of land ecosystems with similar climates and organisms is called a(n)

• energy pyramid

• climate

• biome

• food web

Ponds and rivers are two types of

• marine ecosystems

• freshwater ecosystems

• rainforest biomes

• estuary ecosystems

Which biome is extremely cold and dry?

• desert

• tundra

• grasslands

• mountains

Bacteria and fungi are known as ____________________ because they break down the remains of organisms.

• producers

• first-level consumers

• second-level consumers

• decomposers

Certain bacteria change nitrogen gas into a usable form in a process called _________________________.

• carbon cycle

• nitrogen cycle

• nitrogen fixation

• photosynthesis

Which biome is typically populated by many grasses, along with a few shrubs and trees?

• rainforest

• grassland

• tundra

• desert