Concrete

> Look at this [|illustrated history of concrete] //Click on the back button to come back to this page// That is to give consistency to the mixture
 * **Find out how much you know about concrete!** ||
 * 1) When was concrete first made?
 * || 9000 BC ||
 * X || 3000 BC ||
 * || 100 AD ||
 * || 1756 ||
 * || 1824 ||
 * 2. Check all the possible components of concrete**
 * X || water ||
 * X || cement ||
 * || gravel ||
 * X || sand ||
 * || air ||
 * || steel ||
 * || rods ||
 * 3. What is the purpose of cement in concrete?**

To be able to mold the mixture Concrete can last 50,000 years
 * 4. What role does water play in producing concrete?**
 * 1) **Is concrete stronger in compression, tension, or the same in either? Check out [|this lab] to find the answer.**
 * X || It is stronger in compression ||
 * || It is stronger in tension ||
 * || It is the same in either ||
 * X || True ||
 * || False ||