Testing Gravity

Gravity A natural force Always pulling toward the center of Earth due to the Earth’s mass Things dropped near the surface of the Earth at the same time accelerate at the same rate due to the Earth’s gravity.

Force Fancy word for pushing or pulling Makes things move or change their motion Gravity is a force that pulls things to the ground

Moon Has 1/6 of the Earth’s gravity due to the moon being made up of less mass Less gravity would make us float – like we see on the moon If a child weighed 65 pounds on the Earth, they would weigh 10 pounds on the moon.

Let’s Build a Tower

Connecting AMSTI Kits to Standards MOTION – a change of position, speed or location, but motions requires a force to cause that change.

AMSTI Kit Kindergarten STANDARD P4 – Identify properties of motion, including change of position and change of speed Ramps – gravity pulls the objects down the ramp. The ramp makes them fall faster Balls – gravity pulls the balls down to the Earth

AMSTI Kit First Grade STANDARD P3 – Describe effects of forces on objects, including change of speed, direction, and position. Crayfish/shapes – gravity pulls the objects down until you find the center of gravity (balance point) Ramps/Roller Coasters – gravity pulls the objects down the ramp. The ramp makes them fall faster Tops – must push the top to start spinning Mobiles – must find the center of gravity Parachutes – gravity with air resistance

AMSTI Kit Second Grade STANDARD P4 – Describe observable effects of forces, including buoyancy, gravity, and magnetism. Example: gravity – apple falling from a tree. Butterfly/Fulcrum/beam/balance ____ – gravity pulls the objects down until you find the center of gravity (balance point) Mobiles – must find the center of gravity

Bird Fun

Leaning Tower of Pisa

Space Needle

Center of Gravity

Twin Towers

Center of Gravity - Buoy

Center of Gravity - Below the ground How stable are skyscrapers? Posted by Ethan on June 26, 2009

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