7th Grade

DNA is known as the blueprint for life! Found in every cell of every living thing, DNA strands are packed inside a cell's nucleus carrying instructions and genetic...

While Earth is constantly changing, evidence shows that humans are speeding up the process of the greenhouse effect. Extreme weather, plant and animal extinction, and...

The human body is made of up trillions of cells! Without cells and their remarkable abilities, there would be no life. Layer by layer, you'll journey into animal and plant...

Matter is everywhere. It is anything that can be touched, moved, or interacted with physically. But when breaking matter down into its tiniest pieces, we find that atoms are...

Energy literally makes the world go 'round. Without it, nothing would live, move, or react. While energy cannot be created or destroyed, we rely on it to change form when we...

You can't make something out of nothing. This is because there are certain laws that everything in the universe follows. It may seem like magic, but it's really a matter of...

You eat food every day. In fact, every living organism can't live without it. Digestion is a complex, sometimes gross, process by which our bodies turn a meal into energy...

Out of all the water on Earth, 96 percent of it is found in the ocean. And yet, we know more about space than the dark depths of our own ocean. Dive into the wild waters of...

Stars light up the sky on a clear night. They may look the same from Earth, but they come in many sizes and colors. From the balanced forces of nuclear fusion and gravity...

Every time you eat a sandwich, an apple, or a piece of cake, it's like you are eating a little piece of sunshine! The sun is the source of all energy on Earth and flows...

Amidst more than 200 billion stars in a galaxy measuring 100,000 light years across, life has been discovered only in one place in the Milky Way: planet Earth. Yet the Milky...

Geosphere, hydrosphere, atmosphere, and biosphere-each of these spheres make up planet Earth. From deep below Earth's surface where metals are made to the thermosphere that...