Food Webs
What is a food web?
Overlapping food chains with different pathways for the flow of food energy in an ecosystem.
What is Energy Transfer?
Transfer of energy from the Sun through the different trophic levels of the biosphere.
What are producers?
An organism that makes complex, energy containing biomolecules from simple inorganic molecules using energy captured from light or inorganic chemical compounds.
What are herbivores?
eat producers.
Based on the image. who is the top consumer?
Eagle
Transfer of Energy
The energy organisms need to live and grow first enters the ecosystem when –
plants take in light energy from the Sun.
What are consumers?
An organism that must consume other organisms for nutrients.
What are carnivores?
Eat other animals
Based on the image, what does the raccoon eat?
Grasshopper and frog
How do animals get energy (food)?
Some animals eat plants; some eat other animals.
What happens to energy as it moves from a producer to the top consumer?
Most of the energy is lost
What are decomposers?
Organisms such as bacteria and fungi that break down the remains of dead plants and animals, without need for internal digestion.
What are omnivores?
What would happen if the frog population increased?
1. There would be more competition for flies and grasshoppers.
2. There would be more frogs for raccoons, snakes, and eagles to eat
What happens to energy as it moves from a producer to the top consumer?
The energy remains constant.
Matter is passed from the living part of an ecosystem to the non-living part when which of the following takes place?
Plants decompose
What is the cycle of Matter?
The continuous movement of different types of matter, such as water, phosphorous, nitrogen, and carbon, through different parts of the hydrosphere, lithosphere, atmosphere, and biosphere.
What are scavengers?
feed on the bodies of dead plants or dead animals; secondary, tertiary or higher consumer.
What would happen if the snake population died out?
Multiple Answers
What would happen in this food chain if a disease wiped out the snakes?
grasses -> grasshopper -> bird -> snake
There would be an increase in the population of birds, which would cause an increase in competition between the birds for the grasshoppers.
What is the difference between Autotrophs and Heterotrophs?
Autotrophs can make their own food
Heterotrophs need to consume food
What are trophic levels?
Any class of organisms occupying the same position in a food chain, such as primary consumers or secondary consumers
A substance that provides materials necessary for growth and the maintenance of life.
What would happen if there was a drought that causes the producers in this food web to decrease?
Multiple Answers