December 6, 2011No homework

Open to “How do Plants Change the Air?”

Glue in results table

Results of “How do Plants Change the Air” lab

 

High CO2Low CO2

The amount

of CO2 …

increased was the same

decreased

increased was the same

decrease

What happened to the color?

stayed yellow

turned blue

stayed blue

turned yellow

• One person get high CO2

• One person get low Co2

• Compare with two groups and then record results

Results of “How do Plants Change the Air” lab

 

High CO2Low CO2

The amount

of CO2 …

increased was the same

decreased

increased was the same

decrease

What happened to the color?

stayed yellow

turned blue

stayed blue

turned yellow

Plants change the air by decreasing the amount of CO2

Clean Up

1. Return all elodea to the aquarium

2. Pour fluid in sink

3. Rinse vial

4. Put vial upside down in bins in back- separate caps in separate bin

Conclusion

• Claim: In the light, plants cause the CO2 level to (increase/decrease)

• Evidence: (give data from BOTH vials)

• Reasoning: (explain why this may have happened using your own understanding)

“WHAT IS PHOTOSYNTHESIS?

• 1) Is sunlight matter or energy? How do plants use sunlight in photosynthesis?

• 2) Plants are made mostly of carbohydrates. What atoms are carbohydrates made of?

SUNLIGHT IS ENERGY AND PLANTS USE IT TO MAKE FOOD (STARCH) IN THEIR LEAVES

CARBS ARE MADE OF C, H, AND O ATOMS

3) In order for plants to make their own food, they need three ingredients—what are they?

PLANTS NEED SUNLIGHT, CARBON DIOXIDE, AND WATER

• 4) How does CO2 get into a plant? How does water get into a plant?

• 5) What part of the plant performs photosynthesis?

CO2 GETS INTO A PLANT THROUGH OPENINGS IN THE LEAF AND WATER GETS IN THROUGH THE ROOTS

THE cells of the LEAVES ARE WHERE PHOTOSYNTHESIS TAKES PLACE

6) Other than making glucose, what else is produced by photosynthesis?

O2 IS ALSO PRODUCED BY PHOTOSYNTHESIS—IT IS LEFT OVER

• 7) What is the formula for photosynthesis?

• 8) After sugar (glucose) is made in the leaves, what happens to it/where does it go?

6CO2 + 6H2O LIGHT GLUCOSE + 6O2

THE GLUCOSE TRAVELS TO THE REST OF PLANT SO IT CAN BE USED BY THE CELLS

MATTER: 6 water (H2O) + 6 carbon dioxide (CO2) → sugar (C6H12O6) + 6 oxygen (O2)

ENERGY: light energy → chemical energy

Make an entry:BUILDING BLOCKS FOR PLANTS

What we already know:

• Potatoes contain starch

• Potatoes grow underground.

• Only the above ground parts have green leaves.

• Soil and water aren’t food.

• Question: where does the starch in the potato come from?

To Do Today

1. Get a packet (1 per table) and a chart (1 per person) from the front counter

2. Summarize what is happening in the plant from time 0-5 in your chart.

3. We can do the first one together.

LEAF

POTATO (tuber)

STEM (vascular tissue)

ROOT

Time 0

LEAF

POTATO (tuber)

STEM (vascular tissue)

ROOT

Time 1

Time Interval Observations

Time 0 - Time 1

 

Time 1 - Time 2

 

Time 2 - Time 3

 

Time 3 - Time 4

 

Time 4 - Time 5

 

Time Interval Observations

Time 0 - Time 1

 GLUCOSE IS PRODUCED IN THE LEAVES

Time 1 - Time 2

 

Time 2 - Time 3

 

Time 3 - Time 4

 

Time 4 - Time 5

 

LEAF

POTATO (tuber)

STEM (vascular tissue)

ROOT

Time 2

LEAF

POTATO (tuber)

STEM (vascular tissue)

ROOT

Time 3

LEAF

POTATO (tuber)

STEM (vascular tissue)

ROOT

Time 4

LEAF

POTATO (tuber)

STEM (vascular tissue)

ROOT

Time 5