By Ethel Hanaauer
Cells, utilizing a microscope, flowers, animals; seventy seven experiments contain starting to be protozoa, micro organism, construction a terrarium, starting to be seeds in a sponge, learning spider net formation, comparable fabric. approximately part the experiments require a microscope. Over a hundred illustrations
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Stems and leaves of plants tend to grow not only in the direction of the light but also away from the center of the earth and the force of gravity. This pattern of growth has an interesting name. " 43 WHY LEAVES TURN COLOR IN THE FALL Materials: All you need are several leaves from the same tree, but collected at different times of the year. A botany handbook or a biology text-book will be helpful for identifying leaves you are not sure about. Then, too, you will need the materials you used previously in making collections of pressed ferns and leaves.
Sugar and red maple leaves will be deep, vivid red. Some oak leaves will be purple, others scarlet. The late fall leaves of all these trees will be dull, dry, brown and will fall apart or crumble easily. After a summer of manufacturing food, the chlorophyll bodies (chloroplasts) of green leaves die because they have completed their job. Excess food made during the summer is stored in the trunk and roots of the tree for use during winter. There are pigments other than green in most leaves, but they are hidden under the chlorophyll.
A new plant growing from a part of a plant other than the seed will be almost identical to the parent. Plants grown from seeds may have unforeseen combinations of traits or even very undesirable features. A white potato is actually a thick underground stem. The eyes in the potato are stem and leaf buds. Each piece of potato containing an eye has enough stored food to nourish the buds until green leaves grow from them. Then the green leaves manufacture food for the new plant by the process of photosynthesis.