Transcript Tomatosphere

Week#32, 2012-13
ESSENTIAL
QUESTION
Homework►
Copy first, then respond.
Today
Announcements,
Questions???, Review
Students’ Objective
Quotation
to relate to science or life
Teacher presents.
Students do.
SCIENCE JOURNAL, WEEK #32, Monday, May 6
EQ: How can you start growth of dormant tomato seeds?
My Answer(Class work AND homework):
Homework for Friday: Vocabulary.
Homework for tomorrow: Proofread EQ answer.
A, Q, R
Obj. 6.L.1 (plants)and 6.L.2 (ecology)
“The man who makes no mistakes does not usually make
anything.”—Edward Phelps
Vocabulary instructions (Define and illustrate.)
Tomatosphere planting instructions (powerpoint and oral)
Copy vocabulary terms for the week or take the handout
provided.
Write notes on Tomatosphere planting
Plant the seeds (Follow instructions!)
Tomatosphere
Mission to Mars
What is Tomatosphere?
Click the tomato to link to the website!
Let’s get started on your paper.
Write your heading
Let’s title this.
Notes – Tomatosphere
1.
I’ll make anything
you need to copy on your paper in red text,
like I did with the title up there. Got it?
Let’s get started here.
Copy the questions. You will answer them while viewing the slides.
Notes – Tomatosphere
1. What have our seeds been exposed to?
2. Our OBJECTIVE is to compare what kind of rate?
3. We are comparing this rate for what two groups
of seeds?
4. What are the 4 life requirements that we hope
to supply?
5. What is successful germination for one of our plants?
6. You will use a toothpick to push down your seed to
what depth?
A trip to Mars?
• Our seeds have been exposed to:
• extremely cold temperature (-90oC), and
• very low pressure (almost a vacuum).
Why? Because these conditions are likely to
occur during a trip to Mars.
• HOW WOULD THIS AFFECT TOMATO PLANTS
THAT WE TAKE TO MARS?
Objective
• The Tomatosphere project objective is
– to compare the germination rate of tomato seeds
– and the growth of tomato plants
• What are we comparing?
– Contol group of seeds (Earth-bound)
– to
– Experimental group (Space treated)
Why?
• To answer the question of
• how we can supply people who go to Mars
with life requirements, which are
– food,
– water,
– oxygen
– the need to get rid of carbon dioxide
exhaled.
How?
• You will observe the tomatoes during
their seedling germination and growth.
• You will record your observations and
send the data to NASA.
What is Germination?
• A process by which a seed changes into a
seedling with leaves, stem and roots.
• For purposes of this experiment, a seed can be
considered to have successfully germinated
when two (2) seed leaves (cotyledons) can be
seen.
• Following is a picture.
Germination—two leaves.
Note that two plants are shown here. (One is circled.)
This is
Answer!
an
EQ
Conditions Necessary for Germination
1. Moisture (the stimulus that starts germination)
2. Oxygen: All green plants need oxygen to "breathe"
or respire, just like humans.
3. Warmth:
– Minimum: Tomato plants will not germinate at temperatures below
10°C.
– Optimum: Tomato plants germinate best between 17°C and 20°C.
– Maximum: Tomato plants will not germinate at temperatures which
exceed 35°C.
Planting Medium—Peat pellets
pellets
pellet after soaking in water
(This one has a plant growing in it already.)
Monitor the germination conditions
• Seeds must be kept moist, but not wet.
• Germinating seeds prefer a moderately warm
uniform temperature.
• Ensure that all seeds are germinated under identical
conditions.
• Avoid direct sunlight.
Observe and record
• Detailed and carefully recorded observations
are essential to completing a successful
experiment. Observations will be recorded
daily (except weekends) by a couple of our
students.
Class Observations
Your recording sheet will be similar to this.
Day Number
0
Time
9:50am
Temperature
20 C
Observations/Notes
Planted seeds. Peat pellets
were watered 20 mins before
planting.
Class Observation Charts
It is easy to plant your seeds.
• You will receive
– a cup labeled G or W with moist peat pellet
– a seed
– a toothpick
• Do this.
– Use fingers to place the seed on the peat pellet
– Use the toothpick to push down the seed to a depth
of about 0.7cm (the WIDTH of a pencil)
• You will repeat this when you receive another cup and
seed.
• Any questions?