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With Explore the Planets, investigate the planets, their moons, and understand the processes that shape them. By G. Jeffrey Taylor, Ph.D. See our DVD collection.
The periodic table of the elements, one way to describe the properties of matter.
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Starting Points for Science

There are some basic ideas that you find in many kinds of science. We have grouped these "starting points for science" into three areas: space, time, and matter.

On one hand, "space" is the term we use for everything beyond Earth. "Space" is also the way we tell an object's location or the distance between objects.

Time is the second key idea that helps us get detailed in describing events. Measures of time may be in seconds, days, months, or years.

Out third key concept is matter. Matter is the "stuff" in the Universe. The amount of matter in an object is called the object's mass.

Last modified September 11, 2008 by Randy Russell.

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF