Science March 5 Flashcards
Ecosystem means/stands for what?
Community + Physical Environment
What does Community mean?
All the populations of organisms living together in an environment
What does Individual mean?
A single organism in an environment
Includes the non-living things in an area that provides everything that living organisms need to survive.
Physical Environment
What are the two parts of an ecosystem?
Community and Physical Environment.
Are two bats living on opposite ends of the country part of the same population? Explain your answer.
No, because they are not in the same area.
Give at least two ways organisms interact with their physical environment.
Fish in the water or drinking water. You get oxygen from air.
What is a niche?
A certain role a population has in its habitat.
What is population density?
Number of individuals in a certain area.
Non-living things that affect the organisms living in an ecosystem include weather, landforms and?
Soil
In the nitrogen cycle, nitrogen gas is fixed, or changed, into forms of nitrogen that plants can use. What are these two forms?
Nitrates and ammonia
How do plants gets the nitrogen they need?
From the soil
What do plants make from nitrogen?
Proteins
How do animals get nitrogen?
When they eat plants or other animals that eat plants.
What is one way that fixed forms of nitrogen are returned to the soil?
From animal waste
