Ecosystems: Energy and Cycles

Question 1

Matter is _____________ in an ecosystem.

Answer 1

recycled

Question 2

Energy cannot be recycled…it must be constantly supplied by the _____ .

Answer 2

sun

Question 3

Matter in an eco system includes which 4 things?

Answer 3

Water
Oxygen
Carbon
Nitrogen

Question 4

Molecules of liquid water absorb energy and change to the gas state

Answer 4

Condensation

Question 5

Gas changes to a liquid
Heavy drops of water that fall to Earth
Rain, snow, sleet, hail

Answer 5

precipitation

Question 6

Produces take in carbon dioxide through the atmosphere during _________________ .
They then use this to produce other carbon containing molecules such as sugar and starch. To obtain energy from these molecules consumers break them down and release water and carbon dioxide as waste products. At the same time ______________ is cycled through the atmosphere.

Answer 6

Photosynthesis

Carbon

Question 7

What is recycled through the atmosphere?

Answer 7

carbon

Question 8

Organisms (like us) take in oxygen from the atmosphere and use it for their ___________ ________________

Answer 8

life functions

Question 9

Organisms cannot use nitrogen in the air, they can only use it once is has been _______ .

Answer 9

fixed

Question 10

Fixed nitrogen
Process of __________ nitrogen gas to a usable form.
_______________

Answer 10

turning

bacteria (that live in plants known as legumes) legumes are beans, peas and peanuts

Question 11

The nitrogen found in the atmosphere is not in a form that plants and animals can use. What converts the nitrogen into a usable form?

Answer 11

bacteria

Question 12

What does NOT produce carbon dioxide?

Answer 12

Photosynthesis

Question 13

What is leaked into the atmosphere when fossil fuels are burned?

Answer 13

carbon

Question 14

Volcanoes and fires vent large amounts of __________ ___________ into the sky.

Answer 14

carbon dioxide

Question 15

Dead, organic matter is broken down and __________ __________ is released into the air.

Answer 15

carbon dioxide

Question 16

Decaying organisms are essential for _________ to be released back into the food web.

Answer 16

carbon

Question 17

Things that make carbon:

Answer 17

burning fuel
volcanoes
fires
dead matter
decaying organisms

Question 18

_____________________ study eating patterns to learn how energy flows within an ecosystem.

Answer 18

Ecologists

Question 19

What is the name of a person who studies eating patterns to learn how energy flows within an ecosystem?

Answer 19

Ecologist

Question 20

In terrestrial ecosystems, interdependence refers to the way organisms rely on each other and their environment for survival. Give an example-

Answer 20

Bear (they eat the fox)
Fox (they eat the chicken)
Chicken (they eat plants)
Plants/grass/flowers

Question 21

The main source of energy for the Earth’s ecosystem is-

Answer 21

the sun

Question 22

Marine food chain:

orca
sea otter
fishes
seaweed

What is the role of the Orca in this food chain?

Answer 22

Third order consumer

Question 23

How is phytoplankton a “primary producer”?

Answer 23

They concert sunlight to energy like plants do on land.

Question 24

Energy moves through an ecosystem through a _________ __________.

Answer 24

food chain

Question 25

A series of events where one organism eats another and obtains energy:

Answer 25

food chain

Question 26

What is the bottom level of the food chain called?

Answer 26

Producers ex: tree, grass, flower, crops

Question 27

Second level of the food chain: Primary consumer. Give an example:

Answer 27

bugs (eats plants)

Question 28

Secondary consumers (on the food chain) Give an example:

Answer 28

mouse (eats bugs an plants)

Question 29

Tertiary consumers:

Answer 29

Snakes and birds (eat mice)

Question 30

When a third order consumer dies, it will most likely get consumed by:

Answer 30

bacteria and fungi

Question 31

Which level in the food chain has the most available energy?

Answer 31

Producers (plants)