Science March 21

Question 1

What shows the amount of energy available to pass from one level of a food chain to the next?

Answer 1

Energy pyramid

Question 2

Why does an ecosystem need more producers than consumers in order to have a balanced energy flow?

Answer 2

Because only a small part of the energy in an organism is passed on to the animal that consumes it.

Question 3

How much of the food energy that is taken in by an organism is used for its own life processes?

Answer 3

90 percent

Question 4

What is a food web?

Answer 4

It shows the relationship between many different food chains in a single ecosystem.

Question 5

A long term relationship between different kinds of organisms is called?

Answer 5

Symbiosis

Question 6

Give an example of a symbiotic relationship. Please explain.

Answer 6

The alligator and the bird because the bird helps keep the alligator’s teeth clean

Question 7

Instinct or learned behavior: a child eating with a fork?

Answer 7

Learned behavior

Question 8

Instinct or learned behavior? Ducks flying south for the winter

Answer 8

Instinct

Question 9

A dog rolling over on command?

Answer 9

Learned behavior

Question 10

Parrots talking in English?

Answer 10

Learned behavior

Question 11

Baby sea turtles swimming in the ocean?

Answer 11

Instinct

Question 12

Caterpillars making cocoons?

Answer 12

Instinct

Question 13

Elephants mimicking sounds of other animals?

Answer 13

Learned behavior

Question 14

Give 2 reasons why populations decline.

Answer 14

Over hunting, natural disasters, loss of habitat, human activity climate change

Question 15

Give one reason why hunting can be a positive to the web of life.

Answer 15

Population control, control of invasive species

Question 16

Give it one reason how hunting can be a negative to the web of life.

Answer 16

Could cause animals to become endangered or extinct, over population of other lifeforms