Earth Science - Unit D (Grade K)
Weather, such as wind, sun, rain, and snow, affects the clothing people wear and the activities they can do. Throughout the year, there are daily and seasonal weather changes. They sky looks different during the day than it does at night.
Surrounding Earth is a layer of air, the atmosphere, where conditions are always changing. Try your hand at predicting weather patterns by making a wind vane, a rain gauge, and a barometer.
Huge distances, gigantic sizes, and long periods of time—astronomy is a BIG subject. We've brought learning about it down to size with this look at the big ideas you need to know.
Wouldn't it be cool if you could create a rain cloud? Or call cosmic rays into view? Well, you can do both! All you need is an aquarium, a slide projector, dry ice, and a few other easy-to-get supplies.
The Earth formed over 4.5 billion years ago. and has been changing ever since.
If the Earth turns all the way around every 24 hours, then why are some days longer than others? And why do we have winter and summer? See the answers for yourself—in a matter of seconds.