Science Unit 3 4 Flashcards
1
Q
The relationship in which one species benefits and the other is unharmed is known as _____.
A
commensalism
2
Q
Population size is limited by …
A
biotic and abiotic factors and competition
3
Q
How do decomposers obtain energy in a food chain?
A
Decomposers obtain energy by breaking down the remains of dead and decaying organisms.
4
Q
Nitrogen is a necessary ingredient of ____.
A
proteins
5
Q
Nitrogen in the soil is used by ____.
A
plants and animals
6
Q
Carbon molecules enter the atmospher through the process of …?
A
respiration
7
Q
Describes how carbon moves between living and nonliving things in the environment
A
carbon cycle
8
Q
The amount of CO2 in the atmosphere is increasing. True or False?
A
True
9
Q
Which of the following processes is not involved in the water cycle?
A
respiration
