"Sounds are all around us. Some sounds are loud. Others are quiet. Some sounds are high. Others are low. The sounds that we hear travel as sound waves."--
"How does it work? What does it do? What happens if...? Scientists ask many great questions. Many of these questions lead to more questions. Start by noticing the things around you, and let your curio
"Rocks may not look like they are doing much. But they are always forming, destructing, and recycling. Different types of rocks form in different ways. And different types of rocks have a variety of u
"Earth is constantly moving. Earth is also constantly recycling its resources. Water, oxygen, rocks, and carbon are just a few of the resources that are always moving through a cycle on our planet. Al
"Giraffes have long necks. Polar bears have thick fur and large feet. Octopuses change colors. All of these are adaptations. Adaptations help living things survive. Whether it's hiding from predators,
"Living things depend on a few invisible but essential nutrients to survive. These nutrients each have their own purpose. But they are also interconnected in the nutrient cycle"--
"Computers, refrigerators, and lights. They are all powered by electricity. Many everyday objects need electricity. But what exactly is it and how does it work? Dig deeper into understanding the beaut
"Almost everything you do requires resources. You use them throughout your day. Our planet provides us with natural resources, such as water, wood, oil, and metal. Whether resources are renewable or n
"Have you ever wondered how the human brain works? What about your television? It's a complicated answer, but circuits are a simple way to explain it. Circuits make it possible to turn on a light. The
"How do we know anything about anything? Because someone got curious and asked a question! Scientists use experiments to test their predictions. Making predictions is an important scientific practice.
"We live on planet Earth. It gives us the things we need to survive. When it changes, it affects us all. But humans also affect Earth, and it's changing the planet we call home. It's important that we
"Our moon is magnificent. Sometimes, it appears in the night sky as a massive glowing disk. Other nights, it can't be seen at all. Without the moon, our world would be a different place"--
"Electromagnetism - now that's a big word! But what is it? For starters, it's the force that runs the electronics in your home. Your TV, computers, and even simple light bulbs use electromagnetism. Yo
"Twirling tornadoes, horrific hurricanes, deadly dust storms, and blowing blizzards. Depending where you live, you may have experienced one of these frightening storms. Although being caught in extrem
"There's no place like home! But why is home so great? It's a place that meets your needs. You feel safe. The food is good. And you have somewhere to sleep. But what is good for you is very different
"Some animals are covered in fuzzy fur. Others travel thousands of miles each year, searching for warm weather and food. Some can even blend into their environment. These are traits that help animals
"Have you ever seen a tree at the grocery store buying dinner? Probably not! Plants create their food in a very different way. They make their own food through photosynthesis"--
"We all know the three states of matter: solid, liquid, and gas. But what defines these different states? And what's plasma? What if something is in between states? Is a solquid a real thing? Perhaps
"If you throw a ball, it will soar through the air and then fall with a thump to the floor--thanks to gravity! Gravity makes life possible for all of us. Without gravity we would all float into space.
"Going to school and learning takes energy. Playing a sport or an instrument requires energy, too. Talking with friends, brushing your teeth, putting on your pajamas, all take energy! But what is ener
"A snail eats a leaf. A bird eats the snail. A cat eats the bird. Living things need one another to survive. This is how a food web works. Even you are part of a food web! What did you eat for breakfa
"Forces are part of our everyday lives. And knowing how they work makes us all more powerful! Balanced forces will keep you upright on your bike. Unbalanced forces will help you ride your bike as fast
"If you travel far away, how do you know what type of clothes to pack? You don't want to bring sandals if it's snowing! You need to know what the climate is. Different areas have different climates. L
"Rain, sunshine, warm fronts, and cold fronts. Have you ever listened to a weather report? Knowing the weather can help us plan ahead. But reporters aren't the only ones who can track weather. You can
