Samacheer Kalvi 7th Science Term 1 Unit 1 Solutions

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Samacheer Kalvi 7th Science Term 1 Unit 1 Book Back Question and Answers/Solutions:

Samacheer Kalvi Class 7th Std Science Book Back 1 Mark and 2 Mark Question & Answers PDF uploaded and available below. Class 7th Standard New Syllabus 2022 to 2023 Book Back Question & Answer solutions available for both English and Tamil Medium. Class 7 New Science Book Term 1 Unit 1 – Measurement Answers/Solutions Guide are provided on this page. 7th Std Science Book is of 1st Term consists of 7 units, 2nd and 3rd Term consists of 6 units. All Units/Chapters of Term 1st, 2nd, 3rd Science Book Back One, and Two Mark Solutions are given below.

Check Unit wise and  7th New Science Book Back Question and Answers Guide/Solutions PDF format for Free Download. 7th Std English, Tamil, Maths, Science, and Social Science Book Back Questions and Answers available in PDF. Check Science Book Back Solutions below. See below for the Samacheer Kalvi 7th Science Term 1 Chapter 1 Book Back Answers PDF:




Samacheer Kalvi 7th Science Book Back Chapter 1 Term 1 Answers/Solutions Guide PDF:

7th Science 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.

7th Science – Term 1 Chapter 1

Measurement

 

I. Choose the appropriate answer:

1. Which of the following is a derived unit?
(a) mass
(b) time
(c) area
(d) length
Answer:
(c) area

2. Which of the following is correct?
(a) 1L=lcc
(b) 1L= l0cc
(c) 1L= l00cc
(d) 1L= l000cc
Answer:
(d) 1L = 1000cc

3. SI unit of density is
(a) kg/m2
(b) kg/m3
(c) kg/m
(d) g/m3
Answer:
(b) kg/m3

4. Two spheres have equal mass and volume in the ratio 2:1. The ratio of their density is
(a) 1:2
(b) 2:1
(c) 4:1
(d) 1:4
Answer:
(b) 2:1

5. Light year is the unit of
(a) Distance
(b) time
(c) density
(d) both length and time
Answer:
(a) Distance

II. Fill in the blanks:

  1. Volume of irregularly shaped objects are measured using the law of ___________
  2. One cubic metre is equal to ___________ cubic centimetre.
  3. Density of mercury is ___________
  4. One astronomical unit is equal to ___________
  5. The area of a leaf can be measured using a ___________

Answer:

  1. Archimedes
  2. 10,00,000 or 1066
  3. 13,600 kg/m3
  4. 496×1011m
  5. graph sheet

III. State whether the following statements are true or false.

1. The region covered by the boundary of the plane figure is called its volume.
Answer:
(False) Correct statement: The region covered by the boundary of plane figure is called its area.

2. Volume of liquids can be found using measuring containers.
Answer:
True

3. Water is denser than kerosene.
Answer:
True

4. A ball of iron floats in mercury.
Answer:
True

5. A substance which contains less number of molecules per unit volume is said to be denser.
Answer:
False. Correct statement: A substance which contains more number of molecules per unit volume is said to be denser.

IV. Match the following items:

7th science book back questions with answer

Answer:

1 – i; 2 – ii; 3 – iii; 4 – iv; 5 – v

7th science book back questions with answer

Answer:

1 – i; 2 – ii; 3 – iii; 4 – iv; 5 – v




V. Arrange the following in correct sequence :

1. 1L, 100 cc, 10 L, 10 cc
Answer:
10 cc, 100 cc, 1L, 10L

2. Copper, Aluminium, Gold, Iron
Answer:
Aluminium, Iron, Copper, Gold

VI. Use the analogy to fill in the blank:

1. Area: M2 :: Volume : _________
Answer:
M3

2. Liquid : Litre :: Solid : _________
Answer:
cm3

3. Water: Kerosene :: ______ : Aluminium
Answer:
Iron

VII. Assertion and reason type questions:
Mark the correct choice as

(a) Both assertion and reason are true and reason is the correct explanation of assertion
(b) Both assertion and reason are true, but reason is not the correct explanation of assertion
(c) If assertion is true but reason is false
(d) Assertion is false but reason is true.

1. Assertion (A) : Volume of a stone is found using a measuring cylinder.
Reason (R) : Stone is an irregularly shaped object.
Answer:
(a) If both assertion and reason are true and reason is the correct explanation of assertion

2. Assertion (A) : Wood floats in water.
Reason (R) : Water is a transparent liquid.
Answer:
(b) If both assertion and reason are true, but reason is not the correct explanation of assertion
Correct explanation: Density of water is more than the density of wood.

3. Assertion (A) : Iron ball sinks in water.
Reason (R) : Water is denser than iron.
Answer:
(b) If both assertion and reason are true, but reason is not the correct explanation of assertion
Correct explanation : Density of iron is more than that of water.

VIII. Answer very briefly: 

1. Name some of the derived quantities.
Answer:
Area, volume, density.

2. Give the value of one light year.
Answer:
One light year = 9.46 x 1015m

3. Write down the formula used to find the volume of a cylinder.
Answer:
Volume of a cylinder = πr2 h

4. Give the formula to find the density of objects.
Answer:

7th science book back questions with answer

5. Name the liquid in which an iron ball sinks.
Answer:
Iron ball sinks in water. The density of an iron ball is more than that of water so it sinks in water.

6. Name the unit used to measure the distance between celestial objects.
Answer:
Astronomical unit and light year are the units used to measure the distance between celestial objects.

7. What is the density of gold?
Answer:
Density of gold is 19,300 kg/m3 

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