Description: The tiny building block that makes up everything in the whole wide world!

Example Sentence: Even though they are too small to see, billions of atoms make up your favorite teddy bear.

Description: The upward push from water that helps giant ships stay afloat instead of sinking!

Example Sentence: The rubber ducky floated in the bathtub because of buoyancy.

Description: The steady flow of electricity that moves through wires to power your favorite toys and lights!

Example Sentence: Electrical current flows through the cord to turn on the television.

Description: A measure of how tightly packed together all the heavy stuff inside an object is!

Example Sentence: A block of wood has less density than a block of iron, which is why wood floats!

Description: The awesome superpower that gives things the ability to move, run, heat up, and do work!

Example Sentence: Eating a healthy breakfast gives you the energy to run fast on the playground.

Description: Any push or pull that makes an object start moving, slow down, or completely change direction!

Example Sentence: You have to use a lot of force to push a heavy swing up high.

Description: The invisible helper that keeps our feet on the ground and stops us from floating into space!

Example Sentence: When I tossed the ball into the air, gravity pulled it right back down to my hands.

Description: The cozy kind of energy that loves to move away from warm things and jump into cold things!

Example Sentence: The heat from the campfire warmed up our cold hands.

Description: An object's lazy habit of wanting to keep doing exactly what it is already doing, whether sitting still or zooming along!

Example Sentence: Because of inertia, you slide forward in your seat when the car suddenly brakes.

Description: A handy little unit of measurement we use to count up exactly how much energy something has!

Example Sentence: The scientist measured how many joules of energy were inside the battery.

Description: The fun type of energy that an object gets whenever it is rolling, flying, or moving around!

Example Sentence: A zooming roller coaster has a lot of kinetic energy as it races down the track.

Description: The super-fast waves of energy that illuminate the dark and let our eyes see all the beautiful colors!

Example Sentence: The bright light from the sun helps the flowers grow.

Description: A special tool that can pull certain metals toward itself without even touching them!

Example Sentence: I used a strong magnet to stick my drawing onto the refrigerator door.

Description: The scientific unit we use to measure just how strong a push or a pull is!

Example Sentence: We measured the pull of the rubber band and found it was exactly one newton.

Description: The neat, repeating circular path a planet takes as it travels all the way around the sun!

Example Sentence: It takes one whole year for the Earth to complete its orbit around the sun.

Description: A cool piece of glass that bends white light to reveal a hidden, beautiful rainbow!

Example Sentence: When sunlight shined through the glass prism, a rainbow appeared on the wall.