Lesson plan
Sharp sand
Sharp sand, also known as grit sand or river sand and as builders' sand, concrete sand, or ASTM C33 when medium or coarse grain, is a gritty sand used in concrete and potting soil mixes or to loosen clay soil as well as for building projects. It is not cleaned or smoothed to the extent recreational play sand is. It is useful for drainage. It is an angular grained sand. It was used in the production of brass. It is now used in the building trade. Sand and gravel ridges known as eskers are a frequently used source.
Article summary
Sharp sand, also known as grit sand or river sand and as builders' sand, concrete sand, or ASTM C33 when medium or coarse grain, is a gritty sand used in concrete and potting soil mixes or to loosen clay soil as well as for building projects. It is not cleaned or smoothed to the extent recreational play sand is. It is useful for drainage. It is an angular grained sand. It was used in the production of brass. It is now used in the building trade. Sand and gravel ridges known as eskers are a frequently used source.
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
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