Worksheet Solutions: Rocks and Minerals | Eureka Plus Class 5: Book Solutions, Notes & Worksheets PDF Download

Q1: Multiple Choice Questions (MCQs)

(i) What are the three main types of rocks on Earth?
(a) Soil
(b) Igneous, sedimentary, and metamorphic
(c) Sand, clay, and mud
(d) Hard, soft, and medium
Ans: (b)
Three main types of rocks as igneous, sedimentary, and metamorphic.

(ii) Where are basalt rocks mainly formed?
(a) On mountains
(b) Deep below the Earth's surface
(c) Under the sea
(d) During volcanic eruptions
Ans: (c)
Basalt is mostly formed under the floor of the ocean.

(iii) What process changes existing rocks into metamorphic rocks?
(a) Rapid cooling
(b) Transportation by rivers
(c) Heat and pressure deep within the Earth
(d) Volcanic eruptions
Ans: (c)
Metamorphic rocks are formed through slow changes due to heat and pressure.

(iv) Which statement about minerals is NOT true?
(a) They are found in solid form.
(b) All minerals are gemstones.
(c) They are composed of crystals.
(d) They are natural substances.
Ans: (b)
Not all minerals are gemstones; gemstones are a specific type of mineral.

(v) What does the Mohs' scale measure?
(a) Temperature
(b) Hardness of minerals
(c) Weight of rocks
(d) Density of metals
Ans: (b)
Mohs' scale measures the hardness of minerals, ranging from 1 to 10.

Q2: Fill in the Blanks

(i) Sedimentary rocks are formed when rocks break into tiny pieces due to ________, ________, and ________.
Ans: Wind, water, and weather
These factors break rocks into tiny pieces that eventually form sedimentary rocks.

(ii) What is the use of limestone?
Ans: Making cement and glass
Limestone is used in various applications, including making cement and glass.

(iii) Metals occur naturally in rocks called _________.
Ans: Metal ores
Metals are found in certain rocks known as metal ores.

(iv) Diamond is an example of a precious ________.
Ans: Gemstone
Diamond is a gemstone used for making expensive ornaments.

Q3: Match the Column (In a Table)

Ans:

Q4: True or False

(i) Sedimentary rocks are formed from lava.
Ans: False
Sedimentary rocks are formed from rock fragments that settle at the sea bottom, not from lava.

(ii) All rocks are made up of minerals.
Ans: False
All rocks are not made up of minerals.

(iii) Basalt is formed deep below the Earth when lava flows.
Ans: False
Basalt is mostly formed under the floor of the ocean, not deep below the Earth when lava flows.

(iv) Gemstones are used for making expensive ornaments.
Ans: True
Gemstones like diamond, ruby, topaz, and opal are mentioned to be used for making expensive ornaments.