26 Apr 2022

Samacheer Kalvi 7th Geography Term 1 Unit 1 Book Back Answers

Samacheer Kalvi 7th Geography Term 1 Unit 1 Book Back Questions and Answers:

Samacheer Kalvi 7th Standard Social Science Book Back 1 Mark and 2 Mark Question & Answers uploaded online and available PDF for free download. Class 7th New Syllabus Social Science Term I book back question & answer solutions guide available below for English Medium. TN Class 7 Social Science Geography Book Term 1 Unit 1 – Interior of the Earth Solutions are provided on this page. Students looking for Samacheer Kalvi 7th Geography Term 1 Unit 1 Questions and Answers can check below.

We also provide class 7th other units Book Back One and Two Mark Solutions Guide on our site. Students looking for a new syllabus 7th standard Social Science Term 1 Unit 1 Interior of the Earth Book Back Questions with Answer PDF:

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Samacheer Kalvi 7th Social Science Book Back Unit 1 Term 1 Solution Guide PDF:

TN Class 6th Social Science Geography Subject 1 Mark and 2 Mark Solutions Guide PDF available below. Click the Download option to download the book back 1 Mark & 2 Mark questions and answers. Take the printout and use it for exam purposes.

Geography – Term 1

Unit 1 – Interior of the Earth

I. Choose the correct answer:

1. Nife is made up of …………..
a) Nickel and ferrous
b) Silica and aluminum
c) Silica and magnesium
d) Iron and magnesium
Answer: a) Nickel and ferrous

2. Earthquakes and volcanic eruptions occur near the edges of ……………..
a) Mountain
b) Plains
c) Plates
d) Plateaus
Answer: c) Plates

3. The magnitude of an earthquake is measured by ……………..
a) Seismograph
b) Richter scale
c) Ammeter
d) Rotameter
Answer: b) Richter scale

4. The narrow pipe through which magma flows out is called a ………………..
a) Vent
b) Crater
c) Focus
d) Caldera
Answer: a) Vent

5. ………….. Volcano is known as a lighthouse of the Mediterranean Sea.
a) Stromboli
b) Krokota
c) Fujiyana
d) Kilinanjaro
Answer: a) Stromboli

6. ………………. belt is known as the “Ring of Fire”.
a) Circum – Pacific
b) Mid – Atlantic
c) Mid – Continental
d) Antarctic
Answer: a) Circum – Pacific

II. Fill in the blanks:

1. The core is separated from the mantle by a boundary called……………….
Answer: Weichart – Gutenberg discontinuity

2. The earthquake waves are recorded by an instrument known as ……………….
Answer: Seismograph

3. Magma rises to the surface and spreads over a vast area known as ……………….
Answer: Lava

4. An example of an active volcano ……………….
Answer: Mauna Loa in Hawaii /Mt. Strampoli / St. Helens / Pinatubo

5. Seismology is the study of ……………….
Answer: Earthquakes

III. Circle/Underline the odd one:

1) crust, magma, core, mantle
2) focus, epicenter, vent, seismic waves
3) Uttar Kashi, Chamoli, Koyna, Krakatoa
4) lava, caldera, silica, crater
5) Stromboli, Helens, Hawaii, Fujiyama

Answer:

1) crust, magma, core, mantle
2) focus, epicenter, vent, seismic waves
3) Uttar Kashi, Chamoli, Koyna, Krakatoa
4) lava, caldera, silica, crater
5) Stromboli, Helens, Hawaii, Fujiyama




IV. Match the following:

Question:

1. Earthquake a) Japanese term
2. Sima b) Africa
3. Pacific Ring of Fire e) Sudden movement
4. Tsunami d) Silica and magnesium
5. Mt. Kenya e) World volcanoes

Answer:

1. Earthquake c) Sudden movement
2. Sima d) Silica and magnesium
3. Pacific Ring of Fire e) World volcanoes
4. Tsunami a) Japanese term
5. Mt. Kenya b) Africa

V. Consider the following statement and (✓) Tick the appropriate answer:

1. Assertion (A): There structure of the earth may be compared to that of an Apple.
Reason (R): The interior of the earth consists of the crust, mantle, and core.
a) A and R are correct and A explains R
b) A and R are correct but A does not explain R
c) A is incorrect but R is correct
d) Both A and R are incorrect
Answer: b) A and R are correct but A does not explain R

2. Assertion (A): The Pacific Ocean includes two-thirds of the world’s volcanoes.
Reason (R): The boundary along the Eastern and Western coastal areas of the Pacific Ocean is known as the Pacific Ring of Fire.
a) A and R are correct and A explains R
b) A and R are correct but A does not explain R
c) A is incorrect but R is correct
d) Both A and R are incorrect A
Answer: a) A and R are correct and A explains R

VI. Answer in a word:

1. Name the outermost layer of the earth.
Answer:  The crust

2. What is SIAL?
Answer:
The upper part of the crust i.e., Silica and Alumina.

3. Name the movement of the Earth’s lithospheric plates?
Answer: Techtonic Movements

4. Give an example of an extinct volcano
Answer: Mt. Popa of Myanmar

VII. Give reason:

1. No one has been able to take samples from the interior of the earth
Ans:
The innermost layer of the earth is called the core. The central core has very high temperature and pressure. So no one has been able to take samples from the interior of the earth.

2. The Continent’s crust is less dense than the oceanic crust.
Ans:
Despite the greater thickness, the continental crust is less dense than the oceanic crust because it is made of both light and dense rock types.

Other Important Links for 7th Std Social Science Book Back Solutions:

Tamil Nadu Class 7th Standard Book Back Guide PDF, Click the link – 7th Book Back Questions & Answers PDF

For all three-term of 7th standard Social Science Book Back Answers English Medium – Samacheer kalvi 7th Social Science Book Back Answers




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