Tag: pumpkin science (Page 2 of 2)

Plants Are Growing

After the posts last week about pumpkins, I received a question about whether a fresh pumpkin seed (that came directly from the pumpkin) would grow if you planted it. Here is the answer:

pumpkin growing

I planted these seeds last week after I took them from a fresh pumpkin. Looks like they are more than capable of growing. They are planted in moist potting soil in a newspaper pot.

By the way, the question was a good one because some seeds, for example apple, pear and blueberry, need a cool period ( a winter dormancy) before they will germinate.

November is a good month for gardening in Arizona. We plant many what we call “cold season crops” at this time of year. Lettuce, broccoli, cabbage, brussels sprouts, carrots and chard can all withstand the slight frosts we get here in the winter, and so go into the ground now.

brussel sprouts

The basil in this photograph does better in the warm summer months, but will make it through if we don’t get a heavy frost or if someone remembers to cover it.

herb garden

Hope everyone has a good week. I think I’m going to go make a salad.

Do Apples and Pumpkins Float?

Some questions came in from the previous post on apples and pumpkins about whether apples and pumpkins float. If you can, you should try floating them yourself, because it is fun.

If it’s too cold where you live to be outside playing in water right now, take a look at how our experiments turned out.

floating pumpkin

What about pieces of pumpkin?

floating pumpkin

What about apples?

floating apple

Edit: Find out more about why pumpkins float in the next post

and also this video of a huge pumpkin made into a boat.

Weekend Science Fun: Pumpkins and Apples

Don’t you love going to the grocery store this time of year, with all the pretty pumpkins and fresh apples? Wouldn’t it be fun to use some pumpkins and apples for science activities?

Gather:

  • Pumpkins and apples. Get some different sizes, kinds and colors, if possible.
  • Bathroom/kitchen scale (depending on activities you choose)
  • Container, such as a large plastic bin, to hold water
  • Age-appropriate cutting implement
  • Trays for holding fruit parts
  • Paper
  • Pencils/crayons.

Activity 1. Exploration/Botany Vocabulary
Have your children look at the pumpkins and apples. How are they different, how are they the same?

Both pumpkins and apples are fruit. They both have seeds inside. Both have stems, can you find the stem? What is the stem for? Apples have a skin, does a pumpkin? (Yes, it does). You can ask older children what they think the fleshy meat (the part we eat) is for. Do both pumpkins and apples have a flower or blossom end?

Activity 2. Sorting
Have the children sort the pumpkins from the apples. They can also sort the sizes, from smallest to biggest, or by color. (Sorting is such an important scientific skill, one that tends to get forgotten.)

Activity 3. Weight Estimation
Have the children estimate how much they think each pumpkin/apple weighs. Ask them how they would weigh a big pumpkin.

Help them weigh the pumpkins and apples.

Activity 4. Pumpkin/Apple Floating
Will a pumpkin float? Will an apple float? Does how big it is determine whether it floats or not?

Fill up a large container with enough water to float the biggest pumpkin without slopping over. See if the different fruit will float or not. Have the children bob for apples, if appropriate. Have the children draw what happened.

Activity 5. Seed Estimation
Have the children estimate how many seeds they think are inside each pumpkin or apple before you cut the fruit open. Write down the estimations and compare with the results when you open them in the next activity.

Activity 6. Pumpkin/Apple Exploration
Begin to cut into the pumpkins by cutting around the stem, like you were going to make a jack-o’-lantern. Allow the children who want to explore to get their hands inside. Let them feel the seeds.

Cut the apples and allow the children to search for seeds. Have them count the apple seeds. See if slices will float differently than whole fruit.

Activity 7. Let It Rot!
Rotting or decay is a mysterious and fascinating process for children. In our modern ultra-clean world of antibiotics and hand sanitizers, we forget what an important process it is. If at all possible, find a quiet corner in the yard and let the pumpkin or apple rot. Check the progress daily. Admire the molds that develop. Discuss the odors. If rotting isn’t progressing, add a bit of water.

Activity 8. Grow or Eat the Pumpkins Seeds
You might want to save some of the pumpkin seeds to grow. If so, wash them and let them dry. Don’t heat them/cook them if you want to plant the seeds. Check one of the websites below for more information on growing pumpkin seeds.

Activity 9. Eating

You can oven-dry some of the pumpkin seeds for eating.

Celebrate Fall by making some of your favorite recipes. Here’s one of ours:

Pumpkin Pie in a Glass Smoothie

Add to blender:

1 to 1 1/2 cups canned or pureed cooked pumpkin
2 cups milk, soymilk or ricemilk
1/3 cup sweetener such as maple syrup
1 cup tofu
1 tsp cinnamon
dash nutmeg
1/4 tsp cloves

Blend until well mixed. Makes 4 8oz. Servings.

Early Learning Ideas website has many more excellent lessons for preschoolers.

Related Books:

Pumpkin Circle: The Story of a Garden by George Levenson, Shmuel Thaler (Photographer)

I love this book because it isn’t afraid to show rot.

Check this list of Fall–inspired books from the MissRumphiusEffect Blog.

Patty’s Pumpkin Patch by Teri Sloat

Follow the progress of a pumpkin patch through the seasons while finding items from the alphabet. For example, in the field where the pumpkins are being planted, “a” is for ant and “b” is for beetle.

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