What Is A Chemical Reaction? A chemical reaction is a process where one or more substances, called reactants, are transformed into one or more new substances, known as products. New elements can only be formed by nuclear reactions and not chemical reactions. Some...

Biomes Vs. Ecosystems A biome is a vast region on Earth characterized by a specific climate, geography, and distinct types of living organisms. Major biomes include tundra, aquatic, forests, grasslands, and deserts. The plants and animals in each biome have special...

Parts Of The Nervous System The human nervous system is like the body's control center. It sends and receives messages all over the body, allowing you to interact with the world around you. There are two main parts of the nervous system: The Central Nervous System...

The Digestive Process The human digestive system is an incredible journey that turns food into the energy and nutrients our bodies need to function.  Different parts work together to break down food, absorb nutrients, and eliminate waste. Mouth: Digestion begins in...

What Is An Atom? Atoms are the building blocks of everything around us! We can't see them with our eyes or even with most microscopes. The Basic Parts of an Atom: Nucleus: At the center of every atom is a tiny, dense core called the nucleus. The nucleus is made up of...

What Is the Greenhouse Effect? The greenhouse effect is a natural process that warms the Earth's surface.  When the Sun's energy reaches the Earth, some is reflected to space as infrared radiation, and the rest is absorbed.  Greenhouse gases in the atmosphere trap...

What Are Wetlands? Wetlands are areas where water covers the soil or is present at or near the surface for at least part of the year.  Although wetlands cover only 6% of the Earth's surface, they are critical for life on the planet. They include ecosystems like...