The periodic table of the elements, one way to describe the properties of matter.
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L.Gardiner/Windows to the Universe
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.
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