Rocks - Rocks
Rocks (1) Add new question
Question
Q: what do you know about rocks?
| Option | Answer | Is Correct |
|---|---|---|
| 1 | In quarries, in new railway cuttings, or along the seashore, the ground is formed of one or the other of the following materials; sand gravel, clay, chalk, sandstone, limestone. Coal and the ores of iron and other metals are dug from the ground. in Geology and Geography such substances as these, whether hard like stone or soft like sand which form part of the crust of the earth, are called rocks. Some rocks such as sand are formed of loose grains, others, such as chalk and coal, are compact but are easily broken up. others again, such as granite, are very difficult to break. | |
| 2 | At first there was perhaps a hot molten matter (Lava). In some cases it cooled and solidified on the outside surface of the earth, while in other cases it cooled and solidified at some depth below the surface of the earth. There was no human eye to see this process. Such rocks are known as igneous rocks. They are found in mass and not in layers. |
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