Science Fusion Unit 4 Lesson 1 Grade 3 Part 2 Test
A POPULATION includes many DIFFERENT organisms living together in one place.
A COMMUNITY includes the SAME population living in an area.
Mountain ecosystems are mostly ____.
How many kinds of organisms are in a healthy ecosystem?
How can humans reduce our negative effect on ecosystems?
Why are rainforests so important?
What answer choice is NOT an example of a non- living part of an ecosystem?
Birds produce oxygen.
River water is salt water.
Ocean water is fresh water.
Deserts have cactus plants and ______.
River Otters _______.
Mountains have ______ as part of the living species in their ecosystem.