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Autumn or Fall
One day, in September, you will notice that the days are getting a little cooler. The winds are brisk. You put on a sweater when you go out to play. After a summer of salads and cool drinks, you enjoy eating a bowl of hot soup. Is it your imagination...
Summer
Sometimes so quietly you hardly know it has come, summer arrives. Just as winter and spring have their signals, so summer has its signals. What do you see when you look for the face of summer? You see that the days are longer than at any other t...
Spring
Just as you are beginning to feel that winter will never end, things begin to happen which tell you it will. A warm breeze blows across an open field. Large cracks appear in the ice on the skating pond. Rivers and streams swell and overflow with me...
Winter
Each of the four seasons in our northern hemisphere wears its own face. So it is as easy to tell them apart as it is for you to recognize each of your friends. Each season has its own weather. Each weather change makes a change in you. How does winte...
Heating by day and cooling by night
In the winter you wear warm clothes to protect you from the cold. Most of these clothes are dark-colored — dark reds, navy blues, deep greens. In the summer, when you wear fewer clothes, these clothes are often of white or pale colors. Why? The ans...
Air Presses Down
Suppose you had a stack of pancakes three feet high. Each of the pancakes weighs something. Each is pressed down by the total weight of all the pancakes on top of it. The bottom pancakes would be squeezed the most. The top pancakes would be squeezed ...

