Cycles in Nature

Chapter 2 Section 1

The Cycles of Matter

The Cycles of Matter

1. What is matter? Anything that takes up space and has

mass Used over and over again

2. How old is the matter in your body? It has been on Earth since it was

formed billions of years ago

Water Cycle Movement of

water among oceans, atmosphere, land, and living things

Water Cycle

1. Precipitation Happens when water moves from the

atmosphere to land and oceansRain, snow, sleet , and hail

Water Cycle

2. Evaporation The sun’s heat causes water to

change from liquid to vapor

Water Cycle 3. Condensation

When water vapor cools it forms a liquid that can fall back to Earth as precipitation

Water Cycle

4. Ground Water A. Water that is found underground

and stored in caverns or porous rock B. May stay in the ground for

hundreds or thousands of years C. Provides water to soil, streams,

rivers, and oceans

Water Cycle 5. Transpiration

A. Plants move water vapor into the atmosphere

B. Plants do this by releasing water vapor through tiny openings in their leaves

Water and Life A. Our body is made up of 70%

water B. Water carries waste away from

our body tissues C. Water helps regulate body

temperature through perspiration “sweating” and evaporation This way of returning water to the

environment is called- transpiration

Bell Work Draw the water cycle in your science notebook or

science binder Include in your drawing pictures and explanations for

the process Your drawing should include

Evaporation Condensation Precipitation Transpiration Groundwater Sun Tree Clouds

Bell Work

What process in the water cycle changes water from a liquid to water vapor (gas)?

What process in the water cycle changes water from a gas to a liquid?

Carbon What is GOOD

about Carbon?

What is BAD about Carbon?

Carbon Cycle

Carbon All living things need carbon because

it is part of all biological molecules (fats, sugars, proteins)

Carbon Cycle Movement of carbon from the

environment into living things and back to the environment

Carbon Cycle 1. Photosynthesis A. How carbon cycles

from the environment into living things

B. Plants use CO2

from the air to make sugars (or their own food)

C. Animals get carbon they need from eating plants

Carbon Cycle 2. Cellular

Respiration A. How carbon returns

to the environment from living things

B. Living things break down sugar molecules to release energy

C. During this process, CO2 and water are released

Photosynthesis/Cellular Respiration Equations

Photosynthesis(process of changing light energy into

chemical energy)Sunlight+CO2+water (produces) glucose+O2

Cellular Respiration(process when cells break down food to get

energy)Glucose+O2 (produces) Energy+CO2+water

Bell Work

Name the process in the carbon cycle where carbon is moved from the environment into living things?

Hint (What process uses carbon dioxide (CO2)?

Carbon Cycle 3. Decomposition A. Break down of

dead material into CO2 and H2O

B. When fungi and bacteria decompose organic matter, they return CO2 to the environment

Carbon Cycle 4. Combustion A. Process of burning

fossil fuels B. Fossil fuels-

materials that are slowly formed underground from the remains of plants and animals that died million of years ago

Carbon Cycle (combustion cont.) C. Carbon in coal, oil,

and natural gas return to atmosphere as CO2 when these fossil fuels are burned

D. Combustion provides the fuel people need to drive cars, heat homes, and make electricity

E. Deforestation-removal of forests

Carbon Cycle Practice Quiz

Demo/Quiz

How has Carbon Dioxide levels changed in the atmosphere?

A. CO2 in the atmosphere has increased since the burning of more fossil fuels

B. Many scientists believe that extra CO2 from fossil fuels is adding to global warming

Carbon Dioxide in the Atmosphere

Carbon Cycle Draw the carbon cycle in your science

notebook or science binder Include in your drawing pictures and

explanations for the process Your drawing should include:

Photosynthesis Cellular RespirationDecomposition CombustionTree or plants AnimalsFossil fuels Use of fossil fuelsDeforestation

Quiz Review 1. Where does most of Earth’s

precipitation fall? 2. What is the process where

sunlight, carbon dioxide (CO2), and water is used to make glucose?

3. What is the process where glucose is broken down for energy and carbon dioxide is released?

Quiz Review 4. What are fossil fuels? Name 3

examples. 5. Name 3 ways carbon dioxide is

transferred from living things into the environment?

6. What is the water cycle process where liquid water returns to the atmosphere?

Quiz Review

7. What is the process called when water vapor cools? And what is formed?

8. What is deforestation? 9. What is released during

decomposition? 10. Where is carbon found?

Nitrogen Cycle The movement of

nitrogen from the environment to living things and back again

Nitrogen Cycle A. 78% of the Earth’s

atmosphere is nitrogen gas (N2)

B. Most organisms can not use the nitrogen in the air they breathe

C. Living things need nitrogen to make proteins

How do living things get nitrogen?A.Nitrogen fixation-when bacteria in the soil change nitrogen gas into a formed that can be used by plants

B. Most animals get their nitrogen they need from eating plants

Nitrogen Cycle D. Animal wastes

return nitrogen back to the soil and plants use this nitrogen

E. When plant or animals die, decomposers break down the remains and nitrogen recycles back into the soil

Nitrogen Cycle

How does nitrogen get from the soil back into the atmosphere? Denitrification-to take nitrogen out of

the soil and change it to nitrogen gas that is released into the atmosphere

Denitrifying bacteria produce nitrogen gas as a waste that is released in the atmosphere and completes the cycle

Fungi How is this fungi

important to the carbon cycle?

Manure (animal waste) Why is this farmer

spreading manure on the field?

Explain the importance of this procedure in the nitrogen cycle?

Bell Work 1. Why do we need nitrogen?

2. What is the process when bacteria change nitrogen into a usable form that can be used by plants?

3. What is the process when bacteria take nitrogen out of the soil and change it to a gas that is released in the atmosphere?

Ammonia NH3

Question 21

Review (pages 42-43 in text book)

Answer 1-3, 6-7, 9-12 14 19 24-25