Ecosystems - Grade 5 Science Essential Unit of Study

Fill in the blank: Organisms survive by interacting with ______ and ______ factors in a healthy ecosystem.

• biotic; abiotic

• chemical; physical

• organic; inorganic

• living; nonliving

Fill in the blank: Changes in the ecosystem affect the cycling of ______ and flow of ______ in a food web.

• matter; energy

• energy; matter

• water; nutrients

• carbon; oxygen

Fill in the blank: A healthy ecosystem can be described by how ______ activities can be beneficial or harmful to an ecosystem.

• human

• animal

• weather

• plant

Fill in the blank: The structures and functions of different species help them ______ in the same environment.

• survive

• compete

• hibernate

• migrate

Fill in the blank: Instinctual behavioral traits such as turtle hatchlings returning to the sea and orcas hunting in packs increase chances of ______.

• survival

• migration

• communication

• growth

Plants get most of the matter they need for growth from _____

• air and water

• soil minerals

• sunlight

• fertilizers

A food web shows the feeding interactions of organisms in an _____

• ecosystem

• organism

• cell

• molecule

Plants and animals interact with the gases in the environment they need for survival in different but interrelated ways.

• True

• False

Fill in the blank: Decomposers break down matter from dead organisms into materials that other organisms can ____.

• use

• ignore

• destroy

• avoid

Which of the following plays a key role in maintaining healthy ecosystems by returning nutrients to the soil?

• Photosynthesis

• Decomposition

• Respiration

• Evaporation