let’s start the class of questions, are you ready to hear it?
do you know what exactly is a rock?
okay, let’s make it easy for you guys.
can you see these pictures with numbers, tell me which one is a rock by write the numbers in the small board and putting up.
A - Brick B - Concrete C - Wood D - glass
okay students, lets see your answers
Rock and Rot Rock Rock is a natural material and a brick is not a ...etc
most of your answers are A and B, lets chick if your answer are correct or not by reading this text
This is the text that students should read it.
Rock and Rot Rock Rock is a natural material and a brick is not a natural material it has been artificially manufactured by firing clay in a kiln, often along with additives such as lime to produce a hard and fairly brittle material ideal for use in building. Likewise, concrete is not a natural material, being a mixture of cement, sand, gravel and water. Once liquid concrete has been beloved into place, e. on a garden pathway, it sets due to a chemical reaction that binds the mixture together to form a dry, hard wearing solid. A piece of broken concrete can look very similar to rock such as conglomerate. A related misconception is that a polished piece of marble or a granite paving stone is not a rock because it has been worked and so is no longer natural.