Which of the following best describes a complete ecosystem?

• a single tree

• a forest with trees, animals, sunlight, water, and soil

• a group of fish in a pond

• a bird flying in the sky

In a tropical rainforest, if you move from the canopy to the forest floor, the light intensity _______, the humidity _______ and the wind speed _______.

• decreases, increases, decreases

• increases, decreases, decreases

• decreases, decreases, increases

Which of the following best describes a wetland ecosystem?

• Land areas saturated with water, either permanently or seasonally

• Open sea areas with high salinity

• Freshwater bodies with no vegetation

• Mountainous regions with snow

Mia and Avery are studying a coastal area where fresh water from a river mixes with salt water from the ocean. What is this area called?

• Mangrove Swamp

• Estuary

• Marshes

• Wetland

The part of Earth where organisms can live.

• biotic factors
• biosphere
• ecology
• biology

Evelyn observed a group of the same species of fish swimming together in the ocean at the same time. What is this group called?

• threatened species

• populations

• community

• limiting factor

Identify this type of ecosystem

• Grassland Ecosystem

• Desert Ecosystem

• Wetland Ecosystem

Identify this ecosystem.

• Rainforest Ecosystem

• Savanna Ecosystem

• Desert Ecosystem

In the desert, how do animals escape extreme heat? (There is more than one answer)

• crawling into a crevice

• burrowing underground

• climbing onto a rock

• running really fast

What is the specific role or function of an organism within its environment?

• Community

• Habitat

• Niche