After a log burns in a fireplace, only a few handfuls of soft ashes are left. Most of the matter in the log seems to be gone. But is it really gone? No! It has simply changed into other kinds of...
Building blocks
Atoms are the \"building blocks" of matter. They fit together to make all the things there are. Most kinds of matter are made of atoms that are joined together. These groups of joined atoms are...
Kinds of matter
How many kinds of matter are there? So many that if you started to count them, you probably would never finish! But if you could sort out the atoms in all of that matter, you would find that there...
Bits and pieces
> What's in a sand castle? Millions and millions of tiny grains of sand. The many grains of sand are packed together to make a single shape---a castle with towers, walls, and bridges. And what...
Energy from atoms
> What's the smallest bit of something you can imagine? Is it a cookie > crumb? Is it a pinpoint? Maybe it's the period at the end of this > sentence. > > Actually, all things---even you---are made...
Plants of the ocean community
Life in the ocean Diatoms are tiny plants that live in the ocean. They can be seen only with a microscope. Diatoms are green plants, and make their own food. Tiny, shrimplike copepods eat them....