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How does a tiny seed become one of the heaviest trees on Earth?
Web of Life Unit | Lesson 2 of 7

How does a tiny seed become one of the heaviest trees on Earth?

Web of Life Unit | Lesson 2 of 7
Lesson narration:
Scroll for prep
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DISCUSS:
What materials are already right next to General Sherman?
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DISCUSS:
Which materials do you think plants use for their growth?
Why do you think that?
Step
01/04
You’ll work with a partner.
Step
02/04
Get your supplies.
Step
03a/04
The tree grew from 5 pounds to 170 pounds!
Did the extra weight come from soil that moved into the tree?
Discuss.
Step
03b/04
Here’s what we think.
Step
04/04
Answer questions 1 and 2 about soil on your Plant Matter Mystery
worksheet. Then, discuss:
Slide Image
Answer questions 3 and 4 about water on your Plant Matter Mystery
worksheet.

If you need a natural stopping point!

Teachers: If you are short on time, this is a good stopping point.

If you’re continuing right now, advance to the next slide.

Slide Image
DISCUSS:
Is air matter? How could you find out?
Step
01a/09
Come up with an experiment that would show whether or not air
weighs anything. You can use anything you see here.
Step
01b/09
Here’s what we think.
Step
02/09
Get your supplies.
Step
03/09
Air Experiment 1: inflated basketball vs. deflated basketball.
Watch carefully and observe the weight of each basketball.
Step
04/09
Discuss.
Then, answer the questions for Air Experiment 1 on your
Weighing Air worksheet.
Step
05/09
Air Experiment 2: inflated balloons vs. deflated balloons.
Watch carefully and see what happens to the balance scale.
Step
06/09
Discuss.
Then, answer the questions for Air Experiment 2 on your
Weighing Air worksheet.
Step
07/09
Air Experiment 3: scuba tank with lots of air vs. scuba tank with a
little air. Watch carefully and observe what happens to the scuba
tanks.
Step
08/09
Discuss.
Then, answer the questions for Air Experiment 3 on your
Weighing Air worksheet.
Step
09/09
Think about all your observations and then discuss.
Slide Image
Answer questions 5 and 6 about air on your Plant Matter Mystery
worksheet.
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Answer question 7 and make a claim.
Where do plants like General Sherman get their matter?
Make sure to list evidence to support your claim.
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claim


1 of 15

to say or write an idea
Slide Image

experiment


2 of 15

a test used to discover new information about a question

balance scale


3 of 15

a tool that weighs two items and compares them to see which one is heavier

measure


4 of 15

to describe something using numbers that can be compared
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evidence


5 of 15

information that can be used to support or reject an idea

matter


6 of 15

anything that takes up space and has weight; can be in different forms such as solid, liquid, or gas

states of matter


7 of 15

the different forms of matter that include solid, liquid, and gas

gas


8 of 15

a state of matter, such as water when it is steam

carbon dioxide


9 of 15

a type of gas that plants sometimes take in and that animals release when they breathe
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microscope


10 of 15

a tool used to see very tiny things up close
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stomata


11 of 15

the tiny openings on plant leaves that take in air
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soil


12 of 15

covers the Earth's surface; made of tiny rocks and material from dead plants and animals
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seed


13 of 15

a part of a plant that can grow into a baby plant
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food chain


14 of 15

how living things are connected through what they eat and what they are eaten by
Slide Image

producer


15 of 15

a living thing that makes its own food
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Lesson narration:

Lesson details

Grade 5

Ecosystems & The Food Web

Plant Growth & Matter

5-LS1-1, 5-LS2-1

Activity Prep

Print Prep
THIS LESSON WAS REVISED ON JUNE 14, 2025. Here is a link to the previous version.
In this lesson, students discover how it is possible for plants to grow and gain tremendous amounts of weight without eating anything. In the activity, Plant Matter Mystery, students gather evidence from a series of virtual experiments related to plant growth. Then, they use that evidence to create an argument that plants get matter they need for growth chiefly from air and water.
Preview activity

Jump to

Exploration

10 mins

Wrap-Up

15 mins

Lesson details

Grade 5

Ecosystems & The Food Web

Plant Growth & Matter

5-LS1-1, 5-LS2-1

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Ecosystems Lesson 2: How does a tiny seed become one of the heaviest trees on Earth?

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