Make a Pond

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Who Am I?

I was born on May 23, 1707, in Stenbrohult, Sweden. My father was a pastor and also an amateur botanist. He grew many kinds of flowers in our garden. He loved spending time with me and teaching me the names and parts of the flowers. Because of this, I became very interested in plants and really enjoyed observing them. At first, I studied religion to become a pastor like my father.  But one of my teachers saw that I was very curious about plants, so he encouraged me to study pharmacy. Plants are used to make medicine, so knowing a lot about plants helped me in my pharmacy studies. Later, I studied medicine at Uppsala University. The university had a big garden full of plants, and I could study the plants I loved even more. Because I knew so much about plants, my professors asked me to teach botany—even though I was still a student!

In 1735, I wrote a very famous book called “Systema Naturae”. At first, it was only 14 pages long, but I kept adding more to it. By the time I finished, it had 2,300 pages! In this book, I divided natural into three groups: animals, plants, and minerals. I sorted animals into 6 groups and plants into 24 groups, based on their special features. My system became the basis for how we name and group living things today. I was the first person to create a naming system for all living things, called the  ① .

Scientists all around the world use these names so they can clearly understand which living thing they are talking about. The system uses two names: the ②   name and the  ③ name.

For example, the scientific name for humans is Homo sapiens. ‘Homo’ is the genus name and ‘sapiens’ is the species name. In this system, the genus and species names are written in Latin and italicized. The first letter of the genus is capitalized, while the rest are lowercase. This naming system is used globally, and the name of the person who named the species is often added, usually written as Linnaeus, my Latinized name.

If you discover living thing and give it a name, your name could appear as the person who named it! Known as the Father of Taxonomy and the Prince of Botany, who am I?  ④


Carl von Linne (1707~1778)

Linnaeus Garden (Uppsala University)
Image Courtesy: Calle Eklund / V-wolf

Systema Naturae
Scientific Name of Human (written in binomial nomenclature)
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Observing Leaves

Observing Leaf Structure

Most tree leaves are made up of the ⑤ , ⑥ , and stipules. The leaf blade is green because it has chloroplasts. It helps the plant make food by using sunlight. On the back of the leaf blade, there are tiny holes called stomata that let gases move in and out. The  ⑦ carry water and nutrients and help the leaf keep its shape. The ⑧ connects the leaf to the stem and moves the leaf so it can get more sunlight. Stipules are tiny leaves under the leaf stalk. They protect the young leaf when it is growing.

Leaf Structure

Observing Leaves

Observe the leaves of 5 plants — pine tree, maple tree, ginkgo tree, foxtail, and clover. Write the name of the plant and describe its leaf features.

Name
Leaf Shape
features The leaf has a ⑭ , needle-like tip. Two leaves grow together in the same spot. The leaf is palm-shaped and deeply divided. The tip of the leaf is pointed, and the edge is  ⑮ . The leaf is shaped like a ⑯ , and the edges are wavy. The leaf is long, with ⑰ veins, and its edges have tiny hairs. The leaf grows in clusters of three. The leaf tips are round, and the edges have a ⑱ shape.
Name
Leaf Shape

features

The leaf has a ⑭ , needle-like tip. Two leaves grow together in the same spot.
Name
Leaf Shape
features
The leaf is palm-shaped and deeply divided. The tip of the leaf is pointed, and the edge is (⑮ .
Name
Leaf Shape
features
The leaf is shaped like a ⑯ , and the edges are wavy.
Name
Leaf Shape
features
The leaf is long, with ⑰ veins, and its edges have tiny hairs.
Name
Leaf Shape
features
The leaf grows in clusters of three. The leaf tips are round, and the edges have a ⑱  shape.
.

Classifying by Leaf Shape

Classify the leaves of the five plants (pine tree, maple tree, ginkgo tree, foxtail, clover) using the criteria below.

Is the overall shape of the leaf long?

Does the edge of the leaf have a serrated shape?

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Plants Living in Rivers and Ponds

Activity 1

Please follow the instructions and assemble the educational kit in the order specified.

 

Activity 2: Classify the plants found in rivers and ponds.

How did you classify the plants in rivers and ponds? Write your classification criteria.

Classification Criteria: ㉒

Frogbit, Water lettuce, Water hyacinth, Water lily, Pondweed, Bulrush, Lotus, Cattail, Sweet flag
Myriophyllum verticillatum, Hornwort, Hydrilla verticillata
Activity3 : Observing the Water Hyacinth
Water hyacinth is a perennial plant in tropical areas, but in Korea, it is an annual plant that blooms light purple flowers around July and August. As shown in the picture, water hyacinth is a floating plant. How does it float on water? Review the experiment observation report below and think about how the water hyacinth is able to float.

Water Hyacinth Structure
[Experiment Report] [Experiment 1] 1. Cut the swollen leaf stalk of the water hyacinth horizontally and vertically, as seen in the image. 2. Observe the horizontal and vertical cuts. → You will see  ㉓ on the cut surface of the leaf stalk. [Experiment 2] Place the leaf stalk in a water-filled tank and gently press it with your finger. →  ㉔ will be released from the leaf stalk and rise upwards. ⇨ The reason water hyacinth can float on water is due to the ㉕ in the leaf stalk, which contains air pockets.

A cross-section of the water hyacinth (cut horizontally)
Photo Courtesy: Yonhap News Agency

A cross-section of the water hyacinth (cut vertically)
Photo Courtesy: Yonhap News Agency

Demonstrating the squeezing of the water hyacinth in the tank (bubbles forming).