# Cycling Of Matter

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```					Cycling Of Matter
Water Cycle Pre-Quiz
•Use the definitions on the page and label the
parts of the water cycle.
Raining Cotton Balls data chart
Trial 1   Trial 2   Trial 3

Predict # of drops

Actual # of drops

Difference
Raining Cotton Balls
Procedures:
1. Predict how many drops you think you will need
to drop into the cotton ball “cloud” before it rains.
2. Have one person hold the cotton ball over the
paper plate and the other person will then use the
3. Count the number of drops you need to add to
the cotton ball before it begins dripping water or
“rains”.
Raining Cotton Balls data chart
Trial 1   Trial 2   Trial 3

Predict # of drops

Actual # of drops

Difference

4. Record your actual number of drops.
5. Subtract to find what the difference is between your
prediction and the actual count.
6. Repeat steps 1-5 using a new cotton ball “cloud”
twice more.
Raining Cotton Balls conclusion questions
1. Were you able to make better predictions as you repeated
the experiment? Explain.

3. How is what you did by dropping water into the cotton
ball “cloud” similar to what happens in a real cloud?

4. Explain what parts of the water cycle you are
demonstrating in this experiment.
Water Cycle   The movement of
water between the
oceans, atmosphere,
land, and living
things is known as
the water cycle.
-the sun’s heat
causes water to
change from a liquid
to vapor (gas)-this
is called evaporation.
•Condensation occurs
when the water
vapor cools and
returns to a liquid
state.
•When this water
then falls from the
atmosphere to the
land and oceans it is
called precipitation.
Examples: rain, snow, sleet
•If the water
falls onto the
land and flows
into streams,
rivers or lakes
it is called
runoff.
•If the precipitation
seeps down into the ground
and is stored there it is
called groundwater.
All water taken in by an organism is eventually
released back into the environment. This process
in plants is called transpiration.
Water Cycle Game
1. In which form does water move from one location to another ?
Most movement will take place when water is in the form of water
vapor, with molecules moving rapidly and apart from each other.
2. Each student will start at an assigned station. As you move-remember,
if you are to travel as water vapor –you will travel alone. If you move
from one station to another as a liquid-you will take the person in the
line behind you. (The pairs represent many water molecules clinging
together in a drop. In water vapor, the molecules move individually)

3. If the student rolls a “stay or the station name,” they go to the back
of the line, staying at that location.

4. Be sure to record your path as you travel. You will need it later.
Journey on the Water Cycle Path Record
Name __________________________
water droplet during your journey on the water cycle. You will
what kind of water droplet you feel that you were.

(1) I began my adventure at ________________________.
(2) The first thing that happened was
_____________________________________________,
then I went to _________________________.
(3) The next thing that happened was
_________________________________________________,
then I went to
_________________________________________________.
Water Game Conclusion questions and Path Products (chose 2)

A. Where can water from a plant go?

B. How does water get to a river?

C. Where can water go from a glacier?

D. How does water get to a cloud?

E. As you travelled, where did most students stay?

F. Where in the real world does most of the water stay?

Path Products (chose 2):
-water cycle path bracelet       -water cycle bumper sticker prototype

- water cycle t-shirt    - water cycle cartoon (you are a water droplet)
Water cycle bracelet colors

Animal- gray
Clouds- purple
Plant- any green
Lake- yellow
Soil Surface- brown
Glaciers-white or clear
River- pink
Groundwater- black
Ocean-any blue
It could take millions of years
Carbon Cycle   for a carbon atom to travel
through the carbon cycle
completely
The basis of the carbon cycle is photosynthesis.

PHOTOSYNTHESIS
During this process plants
take in carbon dioxide to
make sugar. Most
organisms get carbon and
energy by eating plants.
When the sugar molecules in the plants are
broken down and energy is released,
carbon is returned to the environment. This
is called respiration.

During respiration, carbon dioxide and
water are released as by-products.
Decomposition occurs when substances are
broken down into simpler molecules.
Another way to break things down is with
fire. Combustion is the process of burning
a substance.

Example: wood in a fire
Both combustion and decomposition
release carbon dioxide into the atmosphere.
Nitrogen Cycle
1. Nitrogen is in the
atmosphere all the time.

2.Bacteria changes nitrogen
into nitrates, which acts like
a natural fertilizer. The
nitrates are taken in by tree
and plant roots where it is
used to build plant protein.

3. Animals eat the protein enriched plants.
4. Animal and plant waste release the protein back into the soil when
they are decomposed.
5. Finally, more bacteria breakdown the plant protein so that it releases
the nitrogen back into the atmosphere. The cycle continues on.
Nitrogen cycle
Lightning causes some Nitrogen Fixation
•78% of our atmosphere
is nitrogen gas. Most
organisms can not use
nitrogen directly, so
bacteria in the soil
changes the nitrogen gas
into a form that plants
can use. This is called nitrogen fixation.
•Other organisms get this nitrogen when they
eat the plants or eat an organism that eats plants.
•Nitrogen is returned to the soil when an
organism dies and is decomposed.
Oversimplifying: the nitrogen cycle works this way.
•Plant and animal wastes decompose, adding nitrogen to the soil.
•Bacteria in the soil convert those forms of nitrogen into forms plants
can use.
•Plants use the nitrogen in the soil to grow.
•People and animals eat the plants; then animal and plant residues
return nitrogen to the soil again, completing the cycle.
Classwork Assignment

Water cycle color and label picture.
Label the picture of the water
cycle with the following terms:

*Accumulation           *Runoff
*Evaporation            *Condensation
*Precipitation
Water Cycle Activity
1. There are 10 stations-each represents a step
in the water cycle.
2. You will be assigned a station, write it down.
3. Pick up the die and roll it. Write down what
the die says. Move to the station you just rolled.
4. Continue doing this until the teacher tells you
to stop.

--Be sure to write down each station you land at.--

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