SCIENCE 7 - ECOSYSTEMS - TRUE FALSE TEST
Producers are the source of all the food in an ecosystem
true
Producers release carbon dioxide as a result of photosynthesis
true
Scavengers and decomposers are part of the energy pyramid
true
Second level consumers may be carnivores or omnivores
true
The grass and other plants that the squirrel eats is a biotic factor
true
The greatest amount of energy is available at the producer level
true
The non living parts of a habitat are called abiotic factors
true
The two major groups of decomposers are mushrooms and bacteria
true
To be considered a community, populations must live close enough to each other to interact.
true
Water is needed by algae and plants to make food
true
Water is needed by all living things
true
photosynthesis is when plants and algae make their own food using water, sunlight and carbon dioxide
true
A group of organisms that are physically similar and can mate and produce offspring that can reproduce is called a species
true
All the bees in a hive is an example of a population
true
An ecosystem is the interaction of biotic and abiotic factors
true
An organism is a living thing that obtains food, water, shelter and other things it needs to live, grow a reproduce from its environment
true
An organism may play more then one role in a food web
true
Decomposers return raw materials to the environment.
true
Fish get oxygen from the water around them
true
About half the energy at one level is transferred to the next
false
All first level consumers are carnivores
false
All the trees is a forest is an example of a population
false
An organism that is killed is called a predator
false
At each higher level of the pyramid, there is more energy available
false
Every organism has a variety of adaptations that enable it to live in any kind of environment
false
If the birth rate is greater then the death rate the population will decrease.
false
Producers are at the top of the food web
false
Producers take in oxygen during photosynthesis
false
Soil, water, sunlight, temperature and oxygen are all examples of biotic factors
false
The soil that provides the squirrel with a home is a biotic factor
false
