| PLANTS - PLANT GROWTH BACKGROUND INFORMATION ON ACTIVITY:
EXPERIMENT #1.
Reproduction and development of plants for different in each species. In
this activity students will observe the development of 3 different types of
plant species and see if the rates of growth are related to the size of the
seed. They will be using monocot and dicot seeds. Go over the difference in
lecture and talk about the difference between plant groups.
Soak the seeds overnight in wet paper towels to give them a jump-start in
terms of germination. Students will work in their lab groups for this
exercise. Students will place their seed in cotton balls, then tape the
cotton ball with the seed facing toward the plastic cup. Students will then
be able to observe their seeds and measure them without disturbing them.
Growth will be hard to measure and will require patience. A spray bottle is
best for keeping the seeds moist.
EXPERIMENT #2.
In this activity the students will observe the growth of plant cuttings.
Students will use different types of plants like geranium, ivy, wandering
jew, creeping charley, or any other available cutting.
PROCEDURE:
Materials and procedures are written on student lab sheets. Have students
follow them carefully.
Lab 1. should consist of getting both experiments ready. Students should do
both lab sheets titled Lab 1-5. Set Up.
SET UP - GROWTH OF PLANT SEEDS
PROBLEM: Does the size of the seed have any relationship to rate of
germination?
HYPOTHESIS: ______________________________________________________
______________________________________________________
PROCEDURE:
Materials: 3 - 4 seeds provided by instructor
cotton balls and tape
clear plastic container
metric ruler
lab sheet and graph paper
spray bottle
Procedure:
1. take 4 seeds of one type of seed
2. place them of them on a cotton ball and tape them to the plastic
container so that they are visible from the outside
3. repeat this procedure for the other two types of seeds
4. draw a picture of each seed on your data chart (see below)
5. keep cotton balls moist but not dripping wet
6. during the next few labs, measure the growth of each seed
7. record the average growth for each type of seed on your data sheet.
8. if growth is not measurable, draw a picture of the seed, on your data
sheet
9. record until lab 9
10.collect and record data
11.record the measurements on a growth chart
12.construct a graph of the growth chart
(SET UP) - GROWTH OF PLANT CUTTINGS
PROBLEM: Do different plants have different rates
of growth?
HYPOTHESIS:____________________________________________________
PROCEDURE:
1. Obtain 2 to 3 plant cuttings. Measure each cutting from the bottom of
the stem to the uppermost leaf. Record the data on the lab sheets title
Growth of Cuttings.
2. Take a clear plastic container and 3 - 4 toothpicks.
3. Fill the plastic container about 2/3 full with water and suspend the
cutting with the roots in the water using the toothpicks.
4. Secure the cutting by interlocking the toothpicks with the cutting.
Repeat this procedure for the second and third cutting. (optional)
5. Measure growth below the water as well as above. Measure the stem
growth, the root growth and the leaf growth. Keep these separate. Record
information as in diagram below.
6. Record the growth in mm. or cm. on your chart during
lab.
7. At the end of the experiment you will graph the results.
MAIN CONCLUSION (after all experiments have been completed):
_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
GROWTH OF SEEDS
PROCEDURE: When you do a long term experiment you need to get
background information on items used. Record the type of seed you are using.
Draw a picture of the outer surface. Then dissect the seed and draw the
cross section. Use the reflecting microscope to help guide you.
Use the same type of seed that you used in lab 5. You should have saved one
of the seeds of each type you used.
type of seed outer surface cross
section
GROWTH OF SEEDS
PROCEDURE: For each seed draw a picture and on each day that you
continue this lab. Also record how much the seed has grown.
TYPE OF SEED _______________________________
|
DATE/SIZE _____________ |
DATE/SIZE ______________ |
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DATE/SIZE _____________ |
DATE/SIZE ______________ |
TYPE OF SEED _______________________________
|
DATE/SIZE _____________ |
DATE/SIZE ______________ |
|
DATE/SIZE _____________ |
DATE/SIZE ______________ |
TYPE OF SEED _______________________________
|
DATE/SIZE _____________ |
DATE/SIZE ______________ |
|
DATE/SIZE _____________ |
DATE/SIZE ______________ |
TYPE OF SEED _______________________________
|
DATE/SIZE _____________ |
DATE/SIZE ______________ |
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DATE/SIZE _____________ |
DATE/SIZE ______________ |
GROWTH OF DIFFERENT SEEDS OVER TIME
graph data
growth in mm
or cm
days
LEGEND
O = ___________ seed x = __________ seed * = ________ seed
CONCLUSION: Is there a relationship between the size of the seed and its
growth rate? Be sure to summarize the data! Use the back if necessary.
Write a report on observations. Include how each of the seeds differ at the
beginning of the experiment and how they changed. Include in your
conclusions if you have found a relationship between the size of the seed
and its growth rate.
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
GROWTH OF CUTTINGS
PROCEDURE: For each cutting draw a picture, and on each day that you
continue this lab. Label and measure the different leaves, roots and stems.
TYPE OF CUTTING _______________________________
|
DATE/SIZE _____________ |
DATE/SIZE ______________ |
|
DATE/SIZE _____________ |
DATE/SIZE ______________ |
TYPE OF CUTTING _______________________________
|
DATE/SIZE _____________ |
DATE/SIZE ______________ |
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DATE/SIZE _____________ |
DATE/SIZE ______________ |
TYPE OF CUTTING _______________________________
|
DATE/SIZE _____________ |
DATE/SIZE ______________ |
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DATE/SIZE _____________ |
DATE/SIZE ______________ |
TYPE OF CUTTING _______________________________
|
DATE/SIZE _____________ |
DATE/SIZE ______________ |
|
DATE/SIZE _____________ |
DATE/SIZE ______________ |
GROWTH OF DIFFERENT CUTTINGS OVER TIME
graph data
growth in mm
or cm
days
LEGEND
O = ___________ x = __________ * = ________
CONCLUSION: Is there a relationship between the growth of different plant
cuttings and time? You may select which data you want to compare, leaves,
roots, or stem. Make sure you state which one. Be sure to summarize the
data! Use the back if necessary.
Write a report on observations. Include how each of the cuttings differ at
the beginning of the experiment and how they changed. Include in your
conclusions if you have found a relationship between the size of the cutting
and its growth rate.
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
_________________________________________________________________
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