The pine tree is an evergreen tree with needles for leaves. The pine tree has pine cones, which are its seed makers. There are two kinds of pine cones. One is small and delicate. It is full of tiny...
Why some flowers smell nice— and some don’t
Flowers that are pollinated by insects have bright colors and sweet smells to attract the insects. salvia flower and bee grass flowers > Flowers that are pollinated by the wind don't need bright...
How some insects help flowers
All flowers are seed makers. But to make seeds, a flower must get some pollen from another flower like itself. Many flowers need the help of bees or other insects to bring pollen to them. How do...
What a flower does
how flowers make seeds > When pollen lands on a flower's stigma, a tube grows down to the > ovule. Here it joins an egg to make a seed. The fruit forms around the > seed. A flower's job is to...
Why some trees stay green all winter
The kinds of trees that people use as Christmas trees are called "evergreens." Evergreen trees are "ever green." They don't change color and lose all their leaves in autumn as other trees do. The...
Why some trees lose their leaves in autumn
Many trees that live where winters are freezing cold lose their leaves each fall. Leaves make the food that keeps a tree alive. But to make food, and to stay alive themselves, leaves need water. A...
What roots do
Roots are like sponges. They soak up water. And roots are anchors, too. A plant's roots grow down into the earth. They spread out and send out branches. They curve around stones. They grow toward...
Why leaves change color in autumn
Inside a leaf there are millions of tiny packages of color---yellow, orange, and green. The yellow is called xanthophyll, the orange is carotene, or carotin, and the green is chlorophyll. The green...
What leaves do
Leaves don't seem to do anything at all. But if you could become tiny enough to peek inside a leaf---you would have a surprise! Sunlight comes into a leaf through the leaf's skin, which is clear...
Why leaves are green
In the furry, finny, feathered world of the animal kingdom, there are many different colors. There are orange and brown giraffes, white polar bears, blue beetles, and red birds. But in the plant...
