How Do You Land on Mars?
Very carefully! Your spacecraft hurtles toward the planet at thousands of miles per hour, so you’ll have to hit the brakes in a hurry!
First, your capsule needs a heat shield. It protects the spacecraft inside from the heat and friction of entry into the...
May
21
Source:National Energy Education Development Project
Air moving around is called wind. Duh! But what makes that air move around in the first place? During the day, air above land heats up quicker than air over water. The warm air over land rises, allowing the heavier, cooler air to rush in and take...
Sep
06
Everyone knows that trees clean the air. But do you know how they do it? Dave Nowak, a researcher with the USDA Forest Service in the Northeast has studied the effect of trees on air quality extensively. Trees clean the air in basically four different ways and Dr. Nowak has organized these as an...
Sep
02
Our air is a very precious resource. People, animals, plants and birds all depend on clean air to live. Choices we make every day can make a positive difference to our air quality, both indoors and out.
Clean Air Tips
Use the car less.
Cars are one of the major sources of air pollution. Walk or...
Sep
02
Do you wonder where all the birds go in the Fall? Are they hiding under a bush somewhere, trying to keep warm?
Snow geese will fly all day and night, despite all conditions, until they reach the next suitable wetland area where they feed off of the grass and small fish. (Courtesy: National Audubon...
Sep
02
