Multiple choice

Cement can be formed by heating the mixture of ___________________ at a very high temperature.

  1. limestone and graphite

  2. limestone and clay

  3. chalk and graphite

  4. clay and graphite

  5. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cement is a fine, soft, powdery-type substance.  It is made from a mixture of elements that are found in natural materials such as limestone, clay, sand. When cement is mixed with water, it can bind sand and gravel into a hard, solid mass called concrete.

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