Wonderopolis Jan 28, Nikki May 8, Hi, I am doing a science fair project on plants and this wonder was very helpful. Thanks a million, Nikki. Wonderopolis May 9, We are so glad that we could help you out! We hope you win a ribbon! Marie Mayo May 8, Wonderopolis May 8, Got to go to bed by the way you are one of the best websites on the Internet in my opinion and my parents love it too. Well got to go goodnight I wonder what the next wonder of the day is bye bye!!!!!!!
This article was very interesting and the video too I loved it sooo much. Moreland's 3rd Grade Class Oct 16, We liked your video so much we watched it twice! My students thought the seeds looked like a creepy monster!
This video goes with our science theme for the month the life cycle of plants and animals. We think tomorrow's wonder will be about Mickey Mouse! Wonderopolis Oct 16, Wonder Friend Aug 3, Great article! We will be linking to this great article on our website.
Keep up the great writing. Wonderopolis Aug 4, Wonderopolis May 29, Julie May 27, I once did a experiment with a plant in second grade. A couple weeks later in second grade, it sprouted.
I think it got enough water and enough sunlight for it to grow. Another time when I'm in 4th Grade, my homeroom planted tomatoes. In a few days, some of the tomato plants sprouted. Wonderopolis May 27, Hector May 23, I loved this one were can I go to find ones related to this one? Wonderopolis May 23, Kyra: May 18, Hey, guys.
I love this video. It was funny, even though plants don't grow that fast probably like 30 days or a week, so hope you guys write back even though you always do. So, bye. Wonderopolis May 18, Wonderopolis May 17, We like it, Colin! Thanks so much for making us smile a little bigger today! Sweet video. I got my mom 30 plants for mothers day and she loves them. It isn't cool to watch plants grow. Where is the excitement? Jazzi May 16, I love watching plants grow. Me and my mom are starting to put plants all the way around my house.
Wonderopolis May 16, Wonderopolis May 15, Tavaris Martin Jr May 15, Thank You, This helped me remember the process of a plant's life. C0Dy May 15, The wonder was actually pretty cool, watching the plants grow from a seed into a plant. It was cool to actually see that. Now that would be cool if plants actually grow that fast, because they would be easier to plant and take care of.
Well, the wonder of the day was cool. Zac May 15, I like wonderopolis. It is full of interesting facts. A May 14, Wonderopolis May 14, The video was amazing, but the article wasn't. Adam May 14, I have a fennel plant in my backyard and it just keeps growing and I don't do anything! Lucky me! Graycee May 14, Dear wonderopolis I think tomorrow's wonder of the day is about Mickey Mouse.
Also, yesterday's wonder what's next was about something that grows in your garden. Miss Greiser's Kindergarteners May 14, We really liked the seed video! We like learning about plants because plants can turn into beautiful flowers.
What is the purpose of the petals on the flowers? What kinds of flowers grow the fastest and the slowest? What is the biggest flower? We love plants! I think tomorrow's wonder will be about Mickey Mouse. Lala May 14, This is a very cool wonder! I wonder what was Wonder 1? Caleb May 14, This reminds me of the time my old class and I put seeds in a bag and taped them on a window and every day checked on it to see if it was growing. Most plants grow from seeds, which come in a variety of shapes, sizes, and textures.
Within this compact package, seeds contain everything a plant needs to grow and reproduce. Some seeds, such as grass, begin life with one leaf. These kinds of seeds are monocots. Other seeds, such as beans, begin life with two leaves. These kinds of seeds are dicots. Emily May 14, I already knew that. We learned that in 3rd grade.
Ms Bayko's class May 14, We thought the plants looked cool when they were growing. The roots looked like worms! We think tomorrow's wonder will be about Mickey Mouse. Utter's Class May 14, It reminds me of when we grew pinto beans at school. Miss Kirsten's Kindergarten GT At optimal temperatures, germination is rapid and uniform. All seeds need both moisture and air to germinate.
Good seed-to-soil contact is very important. A fine-textured seedbed with little compaction is recommended for direct seeding in the field. For greenhouse transplants, soilless media should be moist and fluffy. The soil or growing media must contain enough moisture so that the seed can take up water to begin the germination process.
But if the soil or media are too wet, or too compacted, there will not be enough air around the seed to "breathe". Like any other living organism, seeds need oxygen for respiration, and that oxygen comes from air in the soil.
Not all seeds have the same light requirements. Most seeds germinate best under dark conditions and might even be inhibited by light.
A few other seeds need light to germinate. But once seeds have germinated and broken through the surface of the soil or growing media as seedlings, they all need sunlight to grow. Table 1 shows optimal soil temperatures for germination for common vegetable crops.
When a dry seed comes into contact with moist soil or growing media, the seed begins to take up water through the seed coat. As it takes up more water, the seed expands and the seed coat cracks open. The embryo inside the seed is made up of a small shoot and a small root. The root is the first to emerge from the seed. As it grows, it anchors the plant to the ground, and begins absorbing water through the root. After the root absorbs water, the shoot begins to emerge from the seed.
Most of the vegetable plants that we grow are "dicots". Dicots have two seed leaves in the shoot that emerge from the germinating seed. Tomatoes, peppers, cabbage, beets, lettuce, beans, cucumbers, and squash are all dicots. A few vegetables are monocots, including sweet corn, onions and asparagus. Monocots have one seed leaf in the emerging shoot.
Once the shoot, with its one or two seed leaves, emerges from the soil or growing media, we call the plant a seedling.
Still quite fragile at this stage, the young seedling is vulnerable to diseases and to environmental stresses such as high temperatures and dry soil. The tallest tree currently is over metres tall, and scientists think some trees may have been as much as metres tall. A problem with getting even taller is that trees use water the same as you use blood - to move the nutrients and oxygen and other vital things around our body. But a tall tree has to move it from the roots to the tip of the leaves.
For a metre tall tree, that is like 30 flights of stairs. And a big tree could use more than litres of water every day. Imagine carrying 30 buckets of water up 30 flights of stairs every day! In our tall buildings, we need huge pumps and generators to move the water to the top, but trees just rely on their amazing structure and a little bit of power from the Sun. Hello, curious kids! Ask an adult to send your question to us.
When a seed is exposed to the proper conditions, water and oxygen are taken in through the seed coat. The embryo's cells start to enlarge. Then the seed coat breaks open and a root or radicle emerges first, followed by the shoot or plumule that contains the leaves and stem.
Many things can cause poor germination.
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