The many-eyed Earth watcher

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Solve this crossword about Earth. You will know all the answers if you first read the story below about MISR, the multi-eyed Earth watcher and look at the 3-D pictures!

Play the MISR Crossword Puzzle!

Crossword Instructions: Put the mouse on a numbered square to see the clue. Click if you want to enter the word. For some squares, you may see both an Across Clue and a Down Clue. If you want to enter the word that goes across, hit the letter "a" first. If you want to enter the word that goes down, hit the letter "d" first. If you change your mind about entering a word, hit the ESCape key. You will earn points for every correct word. If you start a new puzzle before finishing the one you're working on, you will lose 40 points.

The Nine-eyed MISR

There are no easy answers up there in the sky! We need to learn a lot more in order to understand how our human activities may be causing unwanted changes on our home planet.

One of the instruments is the Multi-angle Imaging SpectroRadiometer, or MISR ("Miser") for short. MISR is nine cameras in one, each pointing in a different direction. As MISR passes over an area, each camera gets a shot from its own angle. Seeing the same piece of Earth's surface or atmosphere from nine different angles tells scientists a lot more than seeing it from just one angle.

Here are some examples. Click on the small pictures to see bigger ones and to find out what they are. Some are 3-D images that you can see if you have a pair of red/ blue 3-D glasses. .

Make your own greenhouse gases from gumdrops.