Rocks and Minerals - 2 Class 2 Worksheet Science

Q1: Multiple Choice Questions (MCQs)

(i) What are rocks made of?
(a) Candy
(b) Chocolate
(c) Minerals
(d) Toys
Ans: (c)
Rocks are not made of candy, chocolate, or toys. They are made of something called "minerals." Minerals are tiny, natural substances found inside rocks. Imagine rocks like big puzzles, and minerals are the tiny pieces that fit together to make the rock. So, when we talk about what rocks are made of, the correct answer is "minerals."

(ii) Which of these is NOT a type of rock?
(a) Igneous
(b) Sedimentary
(c) Lava
(d) Metamorphic
Ans: (c)
Lava is not a type of rock. Lava is very hot, melted rock that flows out of volcanoes when a volcano erupts. It's like super-hot, liquid rock! The other three options - Igneous, Sedimentary, and Metamorphic - are different types of rocks.

(iii) What type of rock is formed from the cooling of molten lava or magma?
(a) Sedimentary
(b) Metamorphic
(c) Igneous
(d) Fossils
Ans: (c)
Igneous rocks are formed from the cooling of molten lava or magma. When lava or magma cools down, it becomes hard and forms rocks. So, if you ever see rocks that look like they were once very hot and melted, they're probably igneous rocks!

(iv) Which mineral is often used to make jewelry and is usually blue?
(a) Gold
(b) Silver
(c) Diamond
(d) Sapphire
Ans: (d)
Sapphire is a beautiful blue mineral that is often used to make jewelry like rings and necklaces. It can also come in other colors, but it's famous for its lovely blue shade. So, if you see a blue gem in jewelry, it might be a sapphire!

(v) Which type of rock is formed from layers of sediment over time?
(a) Igneous
(b) Sedimentary
(c) Metamorphic
(d) Volcanic
Ans: (b)
Sedimentary rocks are formed from layers of sediment that pile up over a long time. Sediment includes tiny pieces like sand, mud, and shells. These layers press down and stick together to make sedimentary rocks. It's like making a stack of paper with different colors - each layer becomes part of the rock!

Q2: Fill in the Blanks

(i) Rocks are made up of __________.
Ans: Minerals

(ii) ___________ rocks are formed from layers of sediment.
Ans: Sedimentary

(iii) When lava cools down, it forms _________ rocks.
Ans: Igneous

(iv) __________ is a blue mineral often used in jewelry.
Ans: Sapphire

(v) Rocks can be found in different ___________ and sizes.
Ans: Shapes

Q3: Short Questions Answer 

(i) What are minerals, and how are they different from rocks?
Ans: Minerals are naturally occurring substances that have a specific chemical composition and crystal structure. Rocks, on the other hand, are made up of one or more minerals. So, minerals are the building blocks of rocks.

(ii) How are sedimentary rocks formed?
Ans: Sedimentary rocks are formed from layers of sediment that accumulate over time. Sediment includes materials like sand, silt, and clay, which are often deposited by water or wind. Over a long period, these layers of sediment compact and harden to form sedimentary rocks.

(iii) Can you name a rock that is often used to make sculptures?
Ans: Marble is a type of rock that is often used to make sculptures because it can be easily carved and has a smooth, shiny surface when polished.

(iv) What happens to rocks under a lot of heat and pressure over time?
Ans: Rocks that are subjected to high heat and pressure over time undergo a process called metamorphism. During metamorphism, the rocks change in texture and mineral composition, resulting in the formation of metamorphic rocks.

(v) Why are rocks important?
Ans: Rocks are important because they make up the Earth's crust and provide valuable resources. They also give us clues about the Earth's history and the processes that shaped our planet over millions of years.