Let's begin with a WebHunt!

1. One way that plants can be classified is by how they reproduce.

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2. Plants can also be classified by how long they live, or how long it takes them to grow, flower, or set seed. Use this Internet link http://www.urbanext.uiuc.edu/gpe/case1/c1facts1b.html to answer the followings questions.

  • What is an annual? 
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  • What is a perennial?
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  • What is a biennial?
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3. Now that you know what annuals, biennials, and perennials are, can you find two of each kind of plant and briefly describe some characteristics of each plant?
http://www.bhg.com.au/gardening.nsf/content/z_gardening_plant_a-z and http://www.swallowtailgardenseeds.com/categories/perennials.html

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4. List the three main parts of a seed and describe each part. http://ag.arizona.edu/pubs/garden/mg/botany/seeds.html

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 4. List the four main parts of a plant and, in your own words, describe each part. http://www.primaryresources.co.uk/science/plants.htm

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Click on this link to download a "printer friendly" Adobe Acrobat version of the WebHunt.

- requires Adobe Acrobat Reader for viewing.

 Plant Activities

Introduction: In this phase of our unit, we are going to examine some seeds and grow some plants. In addition to taking care of our plants, we will be using them for math activities.

The Parts of a Seed

Soak a lima bean in water overnight. Take your soaked lima bean and remove its coat. What do you think the purpose of this seed coat is? Now open the seed up and what do you see inside? On a piece of paper, draw what you see and label the parts.

Growing Math Plants

The Grade 4 Botanists and their Beans

Two plants that are easy to grow are the Calendula (Pot Marigold) and Beans. Use the Observation Sheet for this activity.

Material needed: Peat pots, seeds, potting soil, supports (popsicle sticks) to train the bean plants.

Planting Instructions:

Calendula (Pot Marigold) The seeds are sown .5 cm deep and prefer moderate watering

Beans - Plant bean seeds 2 to 5 cm deep

Math Activities: Math Concepts - average rate of growth per week, weight of a seed - averages, linear measurement (metric), change to different units of measurement (mm, cm, dm, m), decimals.

  • Use a scale to weigh the seeds. As the seeds are too small to get an accurate weight for each seed, we can calculate the average weight of the seeds by weighing a precounted bunch of seeds and dividing by the number of seeds to get an average. It might be interesting to have the students estimate the mass of each seed before weighing and comparing the estimate to the average mass.
  • Bean seeds germinate quickly if you wrap them in a moist towel and check after a few days. Students can can observe the germination of the seed and record the changes that take place as the seed germinates. Weigh the seeds again to measure the change in mass as the seed germinates. After a few days, plant the seed in soil.
  • Students should observe their plantings daily for the next few weeks and record their observations on the Observation Sheet. Make sure to measure the growth of the plants and record the average growth after each week.
  • Why did some seeds not germinate? Take a look at this site for some possibilities. http://www.urbanext.uiuc.edu/gpe/case3/c3facts3.html
Observation Log

You can use this log to record your observations about your plants. Record the date that you made your observation, the amount of water added to your plant in milliliters, change from previous observation, and the differences between plants. To download a printer friendly version of this Observation Log, CLICK HERE for a pdf version - requires Adobe Acrobat Reader for viewing.

OBSERVATION #__

MARIGOLD

DATE:__________

AMOUNT OF WATER__________

CHANGE FROM LAST OBSERVATION_______________________________________

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BEAN

AMOUNT OF WATER__________

CHANGE FROM LAST OBSERVATION_______________________________________

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DIFFERENCES BETWEEN PLANTS___________________________________________

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Language Arts and Art Activity:

  • Keep a journal about your plant activity. After each plant observation, write a journal entry describing what you did, what you observed, and what you think is happening.
  • Draw a picture of your favourite plant. You may include your picture in your plant journal. You can find information about many different types of plants at the Garden Web or the Online Plant Encyclopedia .
  • You can make an oral presentation about your plants and show the class the pictures that you made of your plants.
  • You can use Microsoft PowerPoint or ClarisWorks Slide Show to create a presentation about your plants. Use a scanner to put your plant drawings into the slide show.


 

This WebHunt and Plant Activity was created by Gerald Robillard and Dee Charbonneau of Our Lady of Peace School. You may contact the authors at grobillard@swlauriersb.qc.ca .


Selected by the SciLinks program, a service of National Science
Teachers Association. Copyright 2001

This activity was last updated on January 18, 2003