Worksheet: Understanding the Earth | Footprints Class 7: Book Solutions, Notes & Worksheets PDF Download

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Multiple Choice Questions (MCQs)

Q1: What is the main driving force behind the formation of igneous rocks?
(a) Heat and pressure
(b) Accumulation of sediments
(c) Cooling and solidification of lava or magma
(d) Transformation under intense heat and pressure

Q2: Which layer of the Earth's structure is partially molten and flows like a liquid?
(a) Crust
(b) Mantle
(c) Core
(d) Asthenosphere

Q3: Sedimentary rocks are primarily formed by:
(a) Accumulation and compression of sediments
(b) Cooling and solidification of lava or magma
(c) Transformation under intense heat and pressure
(d) Weathering and erosion of existing rocks

Q4: Which type of rock is characterized by its lack of fossils and its crystalline nature?
(a) Igneous
(b) Sedimentary
(c) Metamorphic
(d) None of the above

Q5: The main purpose of minerals like bauxite and haematite, found in rocks, is for:
(a) Road construction
(b) Energy production
(c) Agriculture
(d) Industrial use

True or False Statements

Q1: Sedimentary rocks are typically harder than igneous rocks.

Q2: The upper mantle of the Earth is solid throughout.

Q3: Metamorphic rocks are formed by the cooling and solidification of lava or magma.

Q4: Minerals like quartz and feldspar are examples of sedimentary rocks.

Q5: The rock cycle describes the continuous process of formation, transformation, and recycling of rocks on Earth's surface.

Fill in the Blanks

Q2: The __________ is the layer beneath the crust, extending to a depth of about 2,900 km.

Q3: Igneous rocks can be classified as either __________ or __________, depending on where they cool and solidify.

Q4: Sedimentary rocks often contain __________, providing valuable information about past life forms and environmental conditions.

Q5: The main purpose of minerals like bauxite and haematite, found in rocks, is for __________ use.