Friday , March 29 2024
Rocks and Minerals

NCERT 5th Class (CBSE) Science: Rocks and Minerals

Question: Continuous heating and cooling breaks even a hard rock into small pieces of sand. What should we learn from this process?

Answer: This process teaches us that no matter how hard we are but with regular practice and hard work and guidance of our elders we can become a fine human being.

Question: How does heat and pressure of earth contribute to the formation of metamorphic rocks?

Answer: Heat and pressure of the earth can change the physical or chemical composition of igneous or sedimentary rocks and leads to the formation of metamorphic rocks.

Question: Can we find fossils in the granite or marble mines? Why?

Answer: We can find fossils in the granite or marble mines because it is formed from sedimentary rocks which can have fossils in them during their formation.

Question: What is the difference between magma and lava.

Answer: The difference between magma and lava is:

  1. Magma: Molten rock inside the earth is called magma.
  2. Lava: Molten magma that flows out onto the surface of the earth is called lava.

Question: Name the important minerals that are found in igneous rocks.

Answer: The important minerals that are found in igneous rocks are:

  1. Mica
  2. Feldspar
  3. Magnesium

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4 comments

  1. What are igneous rocks?

    • Igneous rock, any of various crystalline or glassy rocks formed by the cooling and solidification of molten earth material. Igneous rocks constitute one of the three principal classes of rocks, the others being metamorphic and sedimentary.

  2. It is very useful for all the students of class 5