This chapter reviews the concepts of ecosystems, including food chains, succession, and population. This chapter reviews the concept of biomes and identifies the major biomes. Physical Sciences - Properties of Matter Anything that has mass and takes up space is matter. Matter can be described according to its physical and chemical properties. This chapter reviews the properties of matter, including chemical properties and physical properties such as mass, volume, and density.
All matter is made up of small particles called atoms.
Scientists have identified 103 different kinds of atoms. Matter made of one kind of atom is called an element. This chapter reviews the structure and behavior of atoms. If different substances are combined without changing either of them, the result is a mixture. In a mixture, each substance maintains its characteristics.