Friction and Fly Balls!!

Friction and Fly Balls!!
Friction and Fly Balls!! When you hit a baseball, speed, angle and air resistance all affect how far it travels. Balls hit too low quickly return to Earth; balls hit too high travel a long way vertically, but not far… More »

Make rainbows!

Make rainbows!
Make a rainbow Rainbows are one of the wonders of the natural world: But why do you sometimes see one rainbow, and other times a double? Why do you always see rainbows with your back to the sun? How do… More »

Make a snowflake

Make a snowflake
The curious growth of a snow crystal Temperature and humidity affects the shape of snowflake crystals. The temperature of formation determines the original crystal shape. Large (“dendritic”) flakes grow best between -10° and -12° C. Plates grow at warmer or… More »

A livable Earth needs air, water and clouds

A livable Earth needs air, water and clouds
A livable Earth needs air, water and clouds You must use an up-to-date browser to view this! Earth’s livable climate comes from the air, water and clouds that surround it. Air and water warm the planet; clouds cool it down.… More »

Play with lightning

Play with lightning
Light on Lightning! Danger! Sound moves about 1,000 feet per second through air. To find out how far away the storm is, start counting “1 one-thousand, 2 one-thousand…” when you see a flash. Five counts, or five seconds, equals about… More »

Control a tornado

Control a tornado
Control a tornado? Absolutely! A tornado that’s 500 meters in diameter looks a lot more ominous than the average twister, which is “only” 150 meters across. All other things being equal, larger tornadoes are more damaging, but size does not… More »