When you eat food, you get a lot of important nutrients that help you grow. The trees that live on our planet also need some nutrients to grow.
Trees use their leaves to help capture energy from the sun to make their own food. But as you may have noticed, a lot of trees lose their leaves during certain times of the year.
Without leaves, they can’t make nearly as much food, and without those important nutrients, they can’t grow very fast.
That’s what I found out from my friend Tim Kohlhauff, a certified arborist and urban horticulture coordinator at Washington State University. He is very curious about the lives of trees. Read More ...
Our planet is home to all kinds of different plants, and they help make a lot of the oxygen we breathe. To find out how plants make oxygen, I asked my friend Balasaheb Sonawane.
Sonawane is a scientist at Washington State University who researches photosynthesis, or the ways plants use energy from the sun and make oxygen. He said that in a way, plants breathe, too.
“They don’t have a nose or mouth,” Sonawane said. “They have tiny microscopic organs on their leaves called stomata.” Read More ...
We can find all kinds of leaves on our planet. Just think of tiny pine needles, fern fronds, ivy vines, or a big banana leaf.
My friend Eric Roalson is a professor at Washington State University who is very curious about plants. He said there are a few things that give leaves their shapes.
The shape of a leaf can depend on the family history of a plant, the group it belongs to, and the environment where it grows up. Read More ...
Ever since I was a kitten, I’ve loved picking up big maple leaves in the fall. I’d take them home, put them under a piece of paper, and rub the side of a crayon over the top. It makes a great print of the leaf.
You know, your question reminds me of a couple other science questions from curious readers. Evangeline, age 7, wants to know why her hair is black. Sureya, age 8, wants to know why some people have curly hair.
It just so happens that one of my favorite science projects explores our questions about what makes us unique. It has to do with our DNA, or the blueprint for life.
My friend Kate Evans said the answer really depends on whether you want the perspective of a person, a plant, or even a cat. Evans is a plant scientist at Washington State University in Wenatchee, where she investigates fruit in the Apple Capital of the World.
She explained how long ago, wild apples actually grew in forests. Without farmers around to plant them in orchards, trees had to scatter their own seeds to survive.
For some trees, the key to survival is growing sweet, ripe fruit.
Where does dirt come from? -Brian, Pullman, WA
In just a word, the story of soil goes something like this: “CLORPT!" It’s fun to say, and it helps explain how tough rock turns into the soft soil farmers need to grow food and feed the world. Read More ...