Sweet Wallpaper News

Sweet Wallpaper wallpapers


How it works

compounds, acids and bases, mixtures, and solutions

Every material is made of either a pure substance or a combination of substances. A substance is pure if it contains only one type of element. An element is a substance made up of all of the same type of atoms. Oxygen is a pure substance. It only contains oxygen atoms. Elements combine in several ways... read more

10 cool things we learned this month

1. Primates like to get tipsy ... read more

nuclear energy

The protons and neutrons of an atom release nuclear energy when they break apart. Every atom contains a lot of energy. The forces that hold the atom together are the strongest forces that scientists know of. ... read more

people who study space

Astronomers are people who study the sky. They make a career out of studying the sky. Amateur astronomers look at planets, stars, and galaxies as a hobby. Astrophysics deals with the behavior and physical properties of all the objects in space. Cosmology studies the origin and structure of the univers... read more

motion and force

Motion ... read more