Learn about force, weight and mass, gravity, laws of motion, pressure, friction, and more.

Learn to measure density and solve the mystery of the gold crown like Archimedes.

This challenge is for anyone who would like to try it.

In this episode of Crash Course Kids, Sabrina shows us that the rate at which things fall to Earth has to do with something called air resistance… oh, and we take a trip to the moon.

In this episode of Crash Course Kids, Sabrina uses them to solve the mystery of what she tripped over last night.

In this episode of Crash Course Kids, Sabrina chats about chemical reactions and the Conservation of Matter.

Mix up some Jell-O, and find out how space bends around anything with mass.

This lesson introduces and provides practice with the measurable attributes of weight.

In this lesson for grades 3‑5, students participate in activities in which they focus on patterns and relations that can be developed from the exploration of balance, mass, length of the mass arm, and the position of the fulcrum.

In this lesson for grades 6‑8, students participate in activities in which they focus on patterns and relations that can be developed from the exploration of balance, mass, length of the mass arm, and the position of the fulcrum.

In this hands-on investigation, students will explore the concepts of buoyancy and mass to create a device to help an action figure stay neutrally buoyant, just like a scuba diver.

Through video clips, students experience crashes (between cars and between cars and the track wall) that occurred during NASCAR races, which raises this question: How do speed and mass (weight) affect the amount of damage to a race car in a collision?