6.3 Everything is Reused

• Biologie
• 9th Grade

6.3 Everything is Reused        p. 161

What is Photosynthesis?

What is Respiration?

01:11

The Carbon Cycle cycles
carbon between...

1. Plants and humans
2. Plants and animals
3. Living and non-living things
4. The Earth and space

01:58

How do think the carbon inside
living things gets recycled?

1. By Respiration
2. By death
3. By photosynthesis
4. By decomposers

02:50

Where does the extra CO2 that is released into the air come from?

1. From ancient carbon in the soil
2. From factories

The Carbon Cycle

The only thing that removes CO2 from the atmosphere is _____________. Plants use it to make fats, ____________ and ___________. Both plant and animal _____________ put _____ back into the atmosphere.

Carbon from dead _________ and _________ can end up as _______ fuels, when this is _________ it releases carbon. Some dead animal and plants could be ________, be ___________ by microorganisms or be turned into _______ ______________ by humans.

Today

The Carbon Cycle (part 2)

• Which processes are involved?
• Recognising the processes in
  the C-cycle

Green plants use carbon dioxide in photosynthesis.

1. True
2. False

Combustion removes carbon from the atmosphere

1. True
2. False

The largest storage of carbon is the atmosphere

1. True
2. False

Respiration adds carbon dioxide to the atmosphere

1. True
2. False

Respiration only occurs in animals

1. True
2. False

Decomposers remove carbon dioxide from the atmosphere

1. True
2. False

Energy is transferred from plants to animals to decomposers

1. True
2. False

00:15

What do we need
Nitrogen for?

00:23

How can we acquire
this Nitrogen?

00:33

How does a general
Nitrogen cycle go?

1. soil - atmosphere - animals
2. atmosphere - soil - animals
3. animals - atmosphere -soil

00:58

Nitrogen falls on the (1) through precipitation, the (2) on the roots of plants take it up and combine this nitrogen with hydrogen to make (3).

1. (1) plants, (2) fungi, (3) oxygen
2. (1) leaves, (2) bacteria, (3) ammonia
3. (1) soil, (2) bacteria, (3) ammonia
4. (1) soil, (2) bacteria, (3) hydrogen

01:18

Ammonia is toxic
so it is turned into _________
by other bacteria.

1. Nitrogen
2. Nitrite
3. Nitrate
4. Nitrogen acid

01:31

Plants can now FINALLY take up
Nitrogen in the form of ________ in a
process called assimilation.

1. Nitrate
2. Nitrite

01:45

Some of the nitrates
are not absorbed by
plants but instead _____.

1. released back into the atmosphere.
2. absorbed by bacteria.
3. released back into the soil.
4. absorbed by bacteria in the plant's roots.

02:16

The nitrogen gets back
into the cycle, either from the
atmosphere or from _____.

1. animal poop.
2. animals when they die.
3. both
4. neither

Today: Nitrogen-cycle

1. Which processes are involved?

2. Which types of bacteria are involved?

Hand-out and TB page 161