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What do sunflowers do when you're not looking?

What do sunflowers do when you're not looking?

Lesson narration:
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My name is Jin.

This is my dad’s garden.

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Last year, when Dad planted the garden, I mostly played in the dirt.

I noticed the ladybugs and other beetles.

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The sunflowers grew taller than I was.

But I wasn’t very tall.

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This year, I help Dad plant seeds.

“We’ll plant tomatoes here,” Dad says. “Beans and radishes go there. We’ll put sunflowers over there.”

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“But I want to plant the sunflowers under the tree by my bedroom window,” I say. “Then I’ll see them every morning when I wake up.”

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“Hmm,” Dad says. “That’s a shady spot. Do you think sunflowers will grow there?”

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stop & talk

Stop & Talk

Do you think sunflowers will grow in the shade by Jin’s window?
How could you find out?

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"I have an idea," I say. “Let’s plant sunflowers in both places! Then we can see what happens.”

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“Great idea!” Dad says. “It’s an experiment! Try out your idea and see what happens.”

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So we planted sunflower seeds in the shade by my window, and in the sun in the middle of the garden.

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By the middle of the summer, all the plants were growing.

There were sunflowers growing in the shade and sunflowers growing in the sun.

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I looked at the young sunflowers every day. And I noticed something.

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In the early morning, all the sunflowers looked like this.

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In the late afternoon, all the sunflowers looked like this.

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stop & talk

Stop & Talk

What difference do you see?

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Sunflowers move!

In the morning, young sunflowers face east, where the sun rises.

In the afternoon, they face west, where the sun sets.

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This super-fast video shows how young sunflowers move with the sun.

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The sunflowers move very slowly all day long.

They turn to face the sun.

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get up & move Get Up & Move: Pretend your face is a sunflower and your hands are leaves. Follow the sun, like young sunflowers do!

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At the end of the summer, I compared the sunflowers growing in the shade with the sunflowers in the sun.

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stop & talk

Stop & Talk

Which sunflowers are growing better? How do you know?
Why do you think those sunflowers are growing more?

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"What do you think?" Dad asks. "Did you find out anything from your experiment?"

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"I found that sunflowers planted in the sun grow taller than sunflowers planted in the shade," I tell him.

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"And I found out that sunflowers move! They turn to face the sun."

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"And you found out one more thing," Dad says.

"What's that?" I ask.

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"You're good at noticing things!" Dad says. "And you can learn a lot when you experiment."

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I wonder what experiments we'll try in the garden next year.

THE END

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# Optional Activity: Plants on the Move

You may have been surprised to see the sunflowers in the video bending to face the sun. Plants move much more slowly than people do, so you have to watch over time to see that a plant has reacted to a change. With this simple experiment, you will be able to see for yourself how plants turn to face the light.

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# Observe and Discuss Part 1

Your teacher has set up a plant in the classroom. Look at the plant carefully and notice the direction that its stem (or stems) are growing.

DISCUSS:
Are the stems pointing straight up? Do they lean to one side?

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# Observe and Discuss Part 2

Next, your teacher will put the plant inside of a box, placing it as far from the hole as possible. The plant should be placed so it leans away from the hole, then the box should be closed.

DISCUSS:
What do think will happen? Think about how the sunflowers responded to sunlight.

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# Observe and Discuss Part 3

Your teacher will water the plant regularly. Each time they do, look at the plant’s stem.

DISCUSS:
Are there any changes?

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Anchor Connection In the past lesson, you read a story about plants growing in the shade and in the sun. Look at the pictures, then discuss. Did these plants grow better in the shade or the sun? How do you know?
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All plants need at least some sunlight, but many plants grow best when they get as much sunlight as they can. These sunflowers definitely grow best in bright sunlight.
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Look at these giant water lily leaves. Discuss. Do you think they grow better in the shade or out in the open where they get lots of sunlight? What makes you think that?
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Giant water lilies grow best when they get lots of sunlight. The giant leaves spread out so that each one gets as much sunlight as it can.
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Get your See-Think-Wonder Chart. Are there any new things that you saw? Are there any new things that you think? Are there any new things that you wonder? Record all of those things in your chart.
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You can save your See-Think-Wonder Chart to review later if you would like. We won’t add any more to it.
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seed


1 of 2

a part of a plant that can grow into a baby plant
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experiment


2 of 2

a test used to discover new information about a question
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Lesson narration:

Activity Prep

Print Prep
In this Read-Along lesson, Jin plants some sunflowers in a sunny spot and some in a shady spot, watches to see which grow best, and then figures out why. The lesson includes a short exercise where students stand up and pretend to be sunflowers, turning their faces to the sun as young sunflowers do. You can extend the lesson with the optional activity, Plants on the Move, where students observe that plants respond to light by bending toward the light source.
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