Rocks: แบบฝึกหัด

Which type of rock is formed from the cooling and solidification of molten magma or lava?

Which of the following statements best explains why granite is often used for kitchen countertops and outdoor steps?

A geologist is examining a rock sample that contains distinct, interlocking mineral crystals but shows no signs of layering or fossil remains. When a drop of dilute hydrochloric acid is placed on the rock, it does not fizz. The geologist also notes that the rock is very hard and can scratch glass. Based on these specific properties, which type of rock is this most likely to be, and what can be inferred about its formation process?

Which of the following is a key characteristic of most sedimentary rocks?

A geologist finds a rock sample that was formed from molten magma cooling very slowly deep underground. Which of the following best describes the texture of this rock?

Which type of rock is formed when existing rocks are subjected to high heat and pressure over a long period of time?

When investigating the hardness of rocks, if Rock X can be scratched by a copper coin but Rock Y can only be scratched by a steel nail, which rock is harder and why?

A geologist finds a rock sample with large, interlocking crystals that are visible to the naked eye. Explain why the cooling rate of the original magma determines this specific texture.

Rocks
(a) What are the three main types of rocks found on Earth?
(b) Describe how igneous rocks are formed and provide one example of an igneous rock.

Rocks
A researcher finds a rock sample near a volcano that is dark, heavy, and has very small, fine crystals.
(a) Is this an intrusive or extrusive igneous rock? Justify your answer based on crystal size.
(b) How does the cooling rate of magma affect the size of crystals in igneous rocks?
(c) Give an example of a common rock that fits this description.