Let's-read-and-find-out science book

Can you see the moon? Does it look like a big round ball? Or is it just a sliver of light in the sky? The moon seems to change. But it doesn't really. The moon revolves around the Earth. It takes about four weeks to make the journey, and as it travels round we can only see certain parts of it. Try the simple experiment described inside using an orange, a pencil, and a flashlight, and you'll understand why the moon seems to change.

29,028 feet tall and still growing?! Even though Mount Everest measures 29,028 feet high, it may be growing about two inches a year. A mountain might be thousands of feet high, but it can still grow taller or shorter each year. Mountains are created when the huge plates that make up the earth's outer shell very slowly pull and push against one another. Read and find out about all the different kinds of mountains.