STAGING
Why do plants give us fruit?

Why do plants give us fruit?
Lesson narration:
English Spanish
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DISCUSS:

What do you think happened to the seeds the pear flowers should have made?

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DISCUSS:

What part of the flower turned into a pear?

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DISCUSS:

Why do you think some plants grow fruit around their seeds?

Hint...

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DISCUSS:

Do you think a tomato is a fruit or a vegetable?

Reveal answer

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Anchor Connection Look at the "Wonder" column of your class See-Think-Wonder chart. Have any questions been answered by this lesson?
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In the past lesson, you saw that flowers turn into fruit with seeds. Discuss. Are bell peppers a science fruit or a science vegetable? How do you know?
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Saguaros grow flowers every spring. But in late spring and early summer, the flowers change into something else. This person pulled one off and opened it up for us. Discuss. What do you notice has changed about these flowers?
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The flower petals dried up. And the base of each flower swelled up and turned into a fruit filled with seeds.
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Every spring, saguaros grow new flowers. In late spring and early summer, the flowers turn into fruit with seeds. This happens every year, again and again.
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Step
01/03
Get your Spotting Cycles worksheet. Remember: on this sheet, we are listing all of the cycles we can find.
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Step
02/03
In the Saguaro Cycles box, add what you learned about how the saguaro flowers turn into saguaro fruit with seeds every year. You can use words, drawings, or both.
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Step
03/03
Save your Spotting Cycles worksheet. You will update it after the next lesson in this unit.
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flower


1 of 13

the reproductive part of some plants that can make seeds
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petal


2 of 13

the colorful part of a flower
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stigma


3 of 13

the sticky part of a flower that pollen can stick to
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ovary


4 of 13

the part of a flower or other living thing that contains its eggs
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stamen


5 of 13

the part of a flower that has pollen
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pollen


6 of 13

a powder plants make that is involved in plant reproduction
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pollination


7 of 13

the process of moving pollen from one part of a flower (the stamen) to another part of a flower (the stigma)
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fruit


8 of 13

the part of a plant that contains seeds inside a covering, like apples
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seed


9 of 13

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


10 of 13

a stage in the life cycle of living things when they have offspring
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offspring


11 of 13

babies
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vegetable


12 of 13

part of a plant that is eaten, like leaves, roots, and stems; does not include fruit that contains seeds
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dissect


13 of 13

to take something apart to study it
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Image & Video Credits

Mystery Science respects the intellectual property rights of the owners of visual assets. We make every effort to use images and videos under appropriate licenses from the owner or by reaching out to the owner to get explicit permission. If you are the owner of a visual and believe we are using it without permission, please contact us—we will reply promptly and make things right.

Exploration
Cherries by 4028mdk09
Open field by Broo_am (Andy B)
Single pear by Xth-Floor
Flowers by Imgur
Pears seeds by Dezidor
Strawberriew by Ken Hammond, U.S. Department of Agriculture
Apple flowers by Дар Ветер
Tree full of flowers by ForestWander
Video: Pear fruit swelling by Neil Bromhall
raccoon eating cherry by Shelly Cox
Apples on tree by George Chernilevsky
monkey eating banana by live-less-ordinary.com
Apple by Amada44
Send a message by ladelentes
squirrel eating orange by Mr.TinDC
airplane by The Photographer
bird eating berries by Matt MacGillivray
bird with large bill by William Warby
Cedar Waxing by Craig Gibson
pear tree (with fruit) by Paul Wood
Baby plant by JMK
pears on branch by Amber Ginsburg and Lia Rousset
pears by Imgur
Maple seeds by Dcrjsr
Inside apple by LD Cross
Bartlett pears by Peaceful Valley Company
Watermelon flower by Meighan
green pepper by Kitty W
Watermelon by Fred Hsu
green pepper flower by Jim Conrad
green pepper sprout by Barbara
Vegetables by Man vyi
Cut up watermelon by Harsha K R
Credits
Lesson narration:
English Spanish

Activity Prep

Print Prep
In this lesson students learn about why plants grow fruit. In the activity, Science Fruit or Vegetable, students examine common grocery produce and predict if each item is a science fruit or science vegetable. Then they take a closer look at slices of the produce and search for seeds.
Preview activity
Number of students:

I have a Mystery Pack

Science Fruit or Science Vegetable worksheet 1 per student
Science Fruit or Science Vegetable Answer Key teacher-only resource 1 per class
Cutting Board
1 board per class
Knife
1 knife per class
Celery
1 stalk per 10 students
Cucumber
1 cucumber per class
Cucumber
1 cucumber per 10 students
Paper Plates
1 plate per student
Potato
1 potato per group
Potato
1 potato per class
Radish
1 radish per group
Radish
1 radish per class
Tomato
1 tomato per group
Tomato
1 tomato per class
Toothpicks
1 toothpick per student
Prep Instructions

Slice Fruits and Vegetables Before Class

We suggest slicing foods before class. We used the foods listed above, but you can use other foods in place of these. Just be sure to include a mix of vegetables that have seeds, such as tomatoes and cucumbers (science fruits), and ones that don’t, such as celery, potatoes, and radishes (science vegetables). If you want to challenge your students, use less familiar produce, such as pineapples, eggplants, and kiwis (science fruits), as well as brussels sprouts (science vegetables).

Place one slice of each type of fruit or vegetable onto a paper plate for each student so that each student will have the opportunity to examine all the produce.

Before students examine the sliced fruit and vegetables and look for seeds, you will show them one whole fruit or vegetable so that they can first make a prediction. So be sure to reserve one of each grocery item to show students.

Exploration

20 mins

Hands-On Activity

25 mins

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