Sandstone is classified as a sedimentary rock. Sedimentary rocks can thousands of years to form.
Sandstone refers to a sedimentary rock with grains between 1/16 millimeter and 2 mm in size (siltstone is made of finer grains). Therefore sandstone doesn’t signify any particular mineral, but in practice, sandstone is usually almost all quartz. Most sandstones, however, [...]
Almost all large cities in the world deal with smog - pollution. Some cities have so much smog that they need to declare smog alerts. This is when smog is so dense that it poses health problems for people who live in the city.
What is Smog?
Smog is photochemical reaction between sunlight and industrial emissions; and the [...]
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The following a 5 interactive websites provides students with the opportunity develop a better understanding of how math is used in science.
5 math and Science Websites
Powers of Ten is presented in a series of images that begin far out in the universe at 10 to the 27th. The slides go from 10 to the 27th down [...]
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