Sun
What is the major source of energy on Earth ?
Why are decomposers important organisms in a food web? A) They produce oxygen. B) They prey on carnivores. C) They are food for producers D) They return nutrients to the soil
What is they return nutrients to the soil?
Can an organism be part of more than one food chain?
A) no, because it cannot be predator and prey at the same time
B) no, because the arrows in a food web can only flow in one direction
C) yes, because it can be prey for more than one organism
D) yes, because it may live in more than one environment
What is C, because it can be prey for more than one organism?
Consider the food chain: grass=> grasshopper=> frog=> snake What would happen in the ecosystem if the grasshopper population died?
A) snakes would eat the grasshopper
B) it would be fine, frogs prefer other insects anyway
C) it would be fine, the grass population would increase
D) the frog population would die from the decrease in their food supply
What is D, the frog population would die from the decrease in their food supply?
Which type of organism is a fungus?
A) carnivore
B) omnivore
C) herbivore
D) decomposer
What is D, decomposer?
Carnivores are animals that eat other animals, and herbivores are animals that only eat plants. Which of the following shows a way that energy from the Sun can flow through an ecosystem that has both carnivores and herbivores?
a. Carnivores-->Sun-->herbivores--> plants
b. Sun-->carnivores--> plants-->herbivores
c. Plants--> carnivores-->Sun-->herbivores
d. Sun-->plants-->herbivores-->carnivores
D. Sun-->plants-->herbivores-->carnivores
When a frog eats a grasshopper, how much of the grasshopper's energy is transferred to the frog?
A) 10%
B) 25%
C) 50%
D) 90%
What is A, 10%?
Animal that gets hunted
What is Prey?
Animal that does the hunting
What is predator?
A certain type of bear mainly eats trout. If the trout population declines, what will most likely happen to the bear population?
A) it will decrease
B) it will increase
C) it will remain the same
D) it will increase and then decrease
What is it will decrease?
In a Mississippi swamp ecosystem, would you expect the alligator or fish population to be bigger?
A) fish, because they feed more predators
B) fish, because alligators can't see them very well
C) alligators, because they are at the top of the food chain
D) alligators, because they have to eat a lot
What is A, because fish feed more predators?