Measurement Online Test 7th Science Lesson 1 Questions in English
Measurement Online Test 7th Science Lesson 1 Questions in English
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Question 1 of 46
1. Question
1. Which among the following is not the physical quantities?
Correct
In daytoday life, we measure many things such as the weight of fruits, vegetables, food grains, volume of liquids, temperature of the body, speed of the vehicles etc., Quantities such as mass, weight, distance, temperature, volume are called physical quantities.
Incorrect
In daytoday life, we measure many things such as the weight of fruits, vegetables, food grains, volume of liquids, temperature of the body, speed of the vehicles etc., Quantities such as mass, weight, distance, temperature, volume are called physical quantities.

Question 2 of 46
2. Question
2. Which among the following is not the classification of physical quantities?
Correct
Generally, physical quantities are classified into two types, namely, (i) Fundamental quantities and (ii) Derived quantities.
Incorrect
Generally, physical quantities are classified into two types, namely, (i) Fundamental quantities and (ii) Derived quantities.

Question 3 of 46
3. Question
3. Which among the following statement is correct
1. A set of physical quantities which cannot be expressed in terms of any other quantities are known as “Derived quantities”. Their corresponding units are called “Derived units”.
2. All other derived quantities which can be obtained by multiplying, dividing or by mathematically combining the derived quantities are known as “Fundamental quantities”. Their corresponding units are called “Fundamental units.Correct
A set of physical quantities which cannot be expressed in terms of any other quantities are known as “Fundamental quantities”. Their corresponding units are called “Fundamental units”.
All other physical quantities which can be obtained by multiplying, dividing or by mathematically combining the fundamental quantities are known as “derived quantities”. Their corresponding units are called “Derived units”.Incorrect
A set of physical quantities which cannot be expressed in terms of any other quantities are known as “Fundamental quantities”. Their corresponding units are called “Fundamental units”.
All other physical quantities which can be obtained by multiplying, dividing or by mathematically combining the fundamental quantities are known as “derived quantities”. Their corresponding units are called “Derived units”. 
Question 4 of 46
4. Question
4. Which among the following is the Derived unit of Area?
Correct
The area is a measure of how much space there is on a flat surface. The area of the plot of land is derived by multiplying the length and breadth
Area = length × breadth
The unit of the area is = metre × metre
= metre2
= m2 (Read as square metre).
Area is a derived quantity as we obtain are by multiplying twice of the fundamental physical quantity lengthIncorrect
The area is a measure of how much space there is on a flat surface. The area of the plot of land is derived by multiplying the length and breadth
Area = length × breadth
The unit of the area is = metre × metre
= metre2
= m2 (Read as square metre).
Area is a derived quantity as we obtain are by multiplying twice of the fundamental physical quantity length 
Question 5 of 46
5. Question
5. Which among the following is the Fundamental unit of Luminous (light) intensity?
Correct
Length – Metre (m); Mass – Kilogram (kg); Time – Second (s); Temperature – Kelvin (K); Electric current – Ampere (A); Amount of substance – Mole (Mol); Luminous (light) intensity – Candela (cd).
Incorrect
Length – Metre (m); Mass – Kilogram (kg); Time – Second (s); Temperature – Kelvin (K); Electric current – Ampere (A); Amount of substance – Mole (Mol); Luminous (light) intensity – Candela (cd).

Question 6 of 46
6. Question
6. Which among the following is the derived unit of Electric charge?
Correct
Area = length × breadth – m × m = square metre (or) m2; Volume = length × breadth × height – m × m × m = cubic metre (or) m3; Speed = distance / time – m / s (or) m s1; Electric charge = electric current × time – A × s = As (or) Coulomb (C); Density = mass / volume – Kg / m3 (or) kg m3.
Incorrect
Area = length × breadth – m × m = square metre (or) m2; Volume = length × breadth × height – m × m × m = cubic metre (or) m3; Speed = distance / time – m / s (or) m s1; Electric charge = electric current × time – A × s = As (or) Coulomb (C); Density = mass / volume – Kg / m3 (or) kg m3.

Question 7 of 46
7. Question
7. What is the area of 10 squares each of side of 1 m?
Correct
Area of a square = side × side
= 1 m × 1 m = 1 m2 or 1 square metre
Area of 10 squares = 1 square metre × 10
= 10 square metre
(Even though the area is given in square metre, the surface need not to be square in shape).Incorrect
Area of a square = side × side
= 1 m × 1 m = 1 m2 or 1 square metre
Area of 10 squares = 1 square metre × 10
= 10 square metre
(Even though the area is given in square metre, the surface need not to be square in shape). 
Question 8 of 46
8. Question
8. Which among the following is the area of Triangle?
Correct
Square = side × side = a × a = a2; Rectangle = length x breadth = l x b=lb; Circle = π ×(radius)2 = π ×r2 =πr2; Triangle = (1/2) × base × height = 1/2 × b × h.
Incorrect
Square = side × side = a × a = a2; Rectangle = length x breadth = l x b=lb; Circle = π ×(radius)2 = π ×r2 =πr2; Triangle = (1/2) × base × height = 1/2 × b × h.

Question 9 of 46
9. Question
9. The area of such irregularly shaped figures can be calculated using what?
Correct
In our daily life, we encounter many irregularly shaped figures like leaves, maps, stickers of stars or flowers, peacock feather etc. The area of such irregularly shaped figures cannot be calculated using any formula. We can find the area of these figures with the help of a graph sheet.
Incorrect
In our daily life, we encounter many irregularly shaped figures like leaves, maps, stickers of stars or flowers, peacock feather etc. The area of such irregularly shaped figures cannot be calculated using any formula. We can find the area of these figures with the help of a graph sheet.

Question 10 of 46
10. Question
10. Find the area of the following regular shaped figures: (Take π = 22/7)
(i) A rectangle whose length is 12 m and breadth is 4 m
(ii) A circle whose radius is 7 m.
(iii) A triangle whose base is 6 m and height is 8 mCorrect
(i) Area of rectangle = length × breadth = 12 × 4 = 48 m2
(ii) Area of circle = π × r2 = (22/7) × 7 × 7 = 154 m2
(iii) Area of triangle = (1/2) × base × height = (1/2) × 6 × 8 = 24 m2Incorrect
(i) Area of rectangle = length × breadth = 12 × 4 = 48 m2
(ii) Area of circle = π × r2 = (22/7) × 7 × 7 = 154 m2
(iii) Area of triangle = (1/2) × base × height = (1/2) × 6 × 8 = 24 m2 
Question 11 of 46
11. Question
11. The amount of space occupied by a threedimensional object is known as its ____
Correct
The amount of space occupied by a threedimensional object is known as its volume. volume = surface area × height.
Incorrect
The amount of space occupied by a threedimensional object is known as its volume. volume = surface area × height.

Question 12 of 46
12. Question
12. The SI unit of volume is __________
Correct
The SI unit of volume is cubic metre or m3. As in the case of area, the volume of the regularly shaped objects can also be determined using an appropriate formula.
Incorrect
The SI unit of volume is cubic metre or m3. As in the case of area, the volume of the regularly shaped objects can also be determined using an appropriate formula.

Question 13 of 46
13. Question
13. Which among the following is the formula used to find volume of cuboid?
Correct
The volume of Cuboid is length × breadth × height = l × b × h = l b h.
Incorrect
The volume of Cuboid is length × breadth × height = l × b × h = l b h.

Question 14 of 46
14. Question
15. Find the volume of (Take π = 22/7)
i. a cube whose side is 3 cm
ii. a cylinder whose radius is 3 m and height is 7 m.Correct
(i) Volume of a cube = side × side × side = 3 cm × 3 cm × 3 cm = 27 cubic cm or cm3.
(b) Volume of a cylinder = π × r2 × height = (22/7) × 3 × 3 × 7 = 198 m3Incorrect
(i) Volume of a cube = side × side × side = 3 cm × 3 cm × 3 cm = 27 cubic cm or cm3.
(b) Volume of a cylinder = π × r2 × height = (22/7) × 3 × 3 × 7 = 198 m3 
Question 15 of 46
15. Question
14. Which among the following is the formula used to find volume of cylinder?
Correct
The volume of cylinder is π × (radius)2 × height = π ×r2 ×h = π r2 h.
Incorrect
The volume of cylinder is π × (radius)2 × height = π ×r2 ×h = π r2 h.

Question 16 of 46
16. Question
16. Which among the following is the formula used to find the volume of sphere?
Correct
The volume of the sphere is 4/3 × π × (radius)3 = 4/3 × π ×r3 = 43 π r3.
Incorrect
The volume of the sphere is 4/3 × π × (radius)3 = 4/3 × π ×r3 = 43 π r3.

Question 17 of 46
17. Question
17. Which among the following statement is correct
1. Liquids also occupy some space and hence they also have volume. But liquids do not possess any definite shape. So, the volume of a liquid cannot be determined as in the case of solids. When a liquid is poured into a container, it takes the shape and volume of the container.
2. The volume of any liquid is equal to the space that it fills and it can be measured using a measuring cylinder or measuring beaker. The maximum volume of liquid that a container can hold is known as the “capacity of the container”. The volume of a liquid is equal to the volume of space it fills in the container. This can be directly observed from the readings marked in the measuring containers.
3. To understand this unit of volume, let us first understand how much a litre means. Litre is the commonly used unit to measure the volume of liquids. we can understand that the unit of volume is cubic cm if the dimensions of the object are given in cm. This cubic cm is commonly known as cc. A volume of 100 cc is termed as one litre (l). 1 litre = 100 cc or cm3 100 ml = 1 litre.Correct
To understand this unit of volume, let us first understand how much a litre means. Litre is the commonly used unit to measure the volume of liquids. we can understand that the unit of volume is cubic cm if the dimensions of the object are given in cm. This cubic cm is commonly known as cc. A volume of 1000 cc is termed as one litre (l). 1 litre = 1000 cc or cm3 1000 ml = 1 litre.
Incorrect
To understand this unit of volume, let us first understand how much a litre means. Litre is the commonly used unit to measure the volume of liquids. we can understand that the unit of volume is cubic cm if the dimensions of the object are given in cm. This cubic cm is commonly known as cc. A volume of 1000 cc is termed as one litre (l). 1 litre = 1000 cc or cm3 1000 ml = 1 litre.

Question 18 of 46
18. Question
18. Which among the following is not the unit to measure the volume of liquids?
Correct
To measure the volume of liquids, some other units are also used. Some of them are gallon, ounce, and quart.
Incorrect
To measure the volume of liquids, some other units are also used. Some of them are gallon, ounce, and quart.

Question 19 of 46
19. Question
19. Which among the following is the value of 1 gallon?
Correct
1 gallon = 3785 ml.
Incorrect
1 gallon = 3785 ml.

Question 20 of 46
20. Question
20. Which is defined as the mass of the substance contained in unit volume (1 m3)?
Correct
Density of a substance is defined as the mass of the substance contained in unit volume (1 m3).
Incorrect
Density of a substance is defined as the mass of the substance contained in unit volume (1 m3).

Question 21 of 46
21. Question
21. Which among the following is the equation of density?
Correct
If the mass of a substance is “M” whose volume is “V”, then, the equation for density is given as
Density (D) = mass (M)volume (V) = MVIncorrect
If the mass of a substance is “M” whose volume is “V”, then, the equation for density is given as
Density (D) = mass (M)volume (V) = MV 
Question 22 of 46
22. Question
22. What is the SI unit of density?
Correct
The SI unit of density is kg/m3.
Incorrect
The SI unit of density is kg/m3.

Question 23 of 46
23. Question
23. The CGS unit of density is ___________
Correct
The CGS unit of density is g/cm3.
Incorrect
The CGS unit of density is g/cm3.

Question 24 of 46
24. Question
24. The materials with lower density are called _______
Correct
Different materials have different densities. The materials with higher density are called “denser” and the materials with lower density are called “rarer”.
Incorrect
Different materials have different densities. The materials with higher density are called “denser” and the materials with lower density are called “rarer”.

Question 25 of 46
25. Question
25. Which among the following material has higher density?
Correct
Air – 1.2 kg/m3, Kerosene – 800 kg/m3, Water – 1000 kg/m3, mercury – 13600 kg/m3.
Incorrect
Air – 1.2 kg/m3, Kerosene – 800 kg/m3, Water – 1000 kg/m3, mercury – 13600 kg/m3.

Question 26 of 46
26. Question
26. What is the density of wood?
Correct
The density of wood is 770 kg/m3.
Incorrect
The density of wood is 770 kg/m3.

Question 27 of 46
27. Question
27. Which among the following material has higher density?
Correct
Iron – 7800 kg/m3, Copper – 8900 kg/m3, Silver – 10500 kg/m3, Gold – 19300 kg/m3.
Incorrect
Iron – 7800 kg/m3, Copper – 8900 kg/m3, Silver – 10500 kg/m3, Gold – 19300 kg/m3.

Question 28 of 46
28. Question
28. A solid cylinder of mass 280 kg has a volume of 4 m3. Find the density of cylinder?
Correct
Density of cylinder = mass of cylinder volume of cylinder = 2804 = 70 Kg/m3.
Incorrect
Density of cylinder = mass of cylinder volume of cylinder = 2804 = 70 Kg/m3.

Question 29 of 46
29. Question
29. A box is made up of iron and it has a volume of 125 cm3. Find its mass. (Density of iron is 7.8 g / cm3).
Correct
Density = Mass / Volume
Hence, Mass = Volume × Density = 125 × 7.8 = 975 g.Incorrect
Density = Mass / Volume
Hence, Mass = Volume × Density = 125 × 7.8 = 975 g. 
Question 30 of 46
30. Question
30. Which among the following equation is incorrect
1. Density = Mass × Volume
2. Mass = Density / Volume
3. Volume = Density / MassCorrect
Density = Mass/ Volume
Mass = Density × Volume
Volume = Mass / DensityIncorrect
Density = Mass/ Volume
Mass = Density × Volume
Volume = Mass / Density 
Question 31 of 46
31. Question
31. A sphere is made from copper whose mass is 3000 kg. If the density of copper is 8900 kg/m3 , find the volume of the sphere.
Correct
Density = Mass / Volume
Hence, Volume = Mass / Density
= 3000 / 8900 = 30 / 89 = 0.34 m3.Incorrect
Density = Mass / Volume
Hence, Volume = Mass / Density
= 3000 / 8900 = 30 / 89 = 0.34 m3. 
Question 32 of 46
32. Question
32. Which among the following is the unit used in space research by astronomers to measure very long distances such as the distance between the earth and a star or the distance between two stars?
Correct
Normally, we use centimetre, metre and kilo metre to express the distances that we measure in our daytoday life. But, for space research, astronomers need to measure very long distances such as the distance between the earth and a star or the distance between two stars. To express these distances, we shall learn about two such units, namely, i. Astronomical unit ii. Light year.
Incorrect
Normally, we use centimetre, metre and kilo metre to express the distances that we measure in our daytoday life. But, for space research, astronomers need to measure very long distances such as the distance between the earth and a star or the distance between two stars. To express these distances, we shall learn about two such units, namely, i. Astronomical unit ii. Light year.

Question 33 of 46
33. Question
33. What is the density of castor oil?
Correct
Water has more density than oils like cooking oil and castor oil, although these oils appear to be denser than water. Density of castor oil is 961 kg/m3. If we put one drop of water in oil, water drop sinks. But, if we put one drop of oil in water, oil floats and forms a layer on water surface. However, some oils are denser than water.
Incorrect
Water has more density than oils like cooking oil and castor oil, although these oils appear to be denser than water. Density of castor oil is 961 kg/m3. If we put one drop of water in oil, water drop sinks. But, if we put one drop of oil in water, oil floats and forms a layer on water surface. However, some oils are denser than water.

Question 34 of 46
34. Question
34. Which is position of the shortest distance between the earth and the sun?
Correct
We all know that the earth revolves around the sun in an elliptical orbit. Hence, the distance between the sun and the earth varies every day. Perihelion is position of the shortest distance between the earth and the sun.
Incorrect
We all know that the earth revolves around the sun in an elliptical orbit. Hence, the distance between the sun and the earth varies every day. Perihelion is position of the shortest distance between the earth and the sun.

Question 35 of 46
35. Question
35. What is the distance between sun and earth in perihelion position?
Correct
When the earth is in its perihelion position (Perihelion is position of the shortest distance between the earth and the sun), the distance between the earth and the sun is about 147.1 million kilometres.
Incorrect
When the earth is in its perihelion position (Perihelion is position of the shortest distance between the earth and the sun), the distance between the earth and the sun is about 147.1 million kilometres.

Question 36 of 46
36. Question
36. Which is the position of farthest distance between the earth and the sun?
Correct
When the earth is in its farthest position, that is when the distance between Earth and Sun is the largest it is called aphelion position.
Incorrect
When the earth is in its farthest position, that is when the distance between Earth and Sun is the largest it is called aphelion position.

Question 37 of 46
37. Question
37. What is the distance between sun and earth in aphelion position?
Correct
When the earth is in its farthest position, that is when the distance between Earth and Sun is the largest (called aphelion position) the distance is 152.1 million kilometres.
Incorrect
When the earth is in its farthest position, that is when the distance between Earth and Sun is the largest (called aphelion position) the distance is 152.1 million kilometres.

Question 38 of 46
38. Question
38. Th e average distance between the earth and the sun is about _______
Correct
The average distance between the earth and the sun is about 149.6 million kilometres. Th is average distance is taken as one astronomical unit. One astronomical unit is defi ned as the average distance between the earth and the sun.
Incorrect
The average distance between the earth and the sun is about 149.6 million kilometres. Th is average distance is taken as one astronomical unit. One astronomical unit is defi ned as the average distance between the earth and the sun.

Question 39 of 46
39. Question
39. What is the distance of Neptune from the sun?
Correct
Neptune is 30 AU away from the Sun. It means it is thirty times farther than the Earth.
Incorrect
Neptune is 30 AU away from the Sun. It means it is thirty times farther than the Earth.

Question 40 of 46
40. Question
40. The nearest star to our solar system is ____________
Correct
The nearest star to our solar system is Proxima Centauri. It is at a distance of 2,68,770 AU.
Incorrect
The nearest star to our solar system is Proxima Centauri. It is at a distance of 2,68,770 AU.

Question 41 of 46
41. Question
41. We can clearly see that using the AU for measuring distances of stars would be unwieldy. Therefore, astronomers use a special unit, called _________
Correct
We can clearly see that using the AU for measuring distances of stars would be unwieldy. Therefore, astronomers use a special unit, called ‘light year’, for measuring the distance in deep space. One light year is defined as the distance travelled by light in vacuum during the period of one year.
Incorrect
We can clearly see that using the AU for measuring distances of stars would be unwieldy. Therefore, astronomers use a special unit, called ‘light year’, for measuring the distance in deep space. One light year is defined as the distance travelled by light in vacuum during the period of one year.

Question 42 of 46
42. Question
42. What is the speed of light in vacuum?
Correct
We, have learnt that the speed of light in vacuum is 3 × 108 m/s. Th is means that light travels a distance of 3 × 108 m in one second.
Incorrect
We, have learnt that the speed of light in vacuum is 3 × 108 m/s. Th is means that light travels a distance of 3 × 108 m in one second.

Question 43 of 46
43. Question
43. What is the value of 1 light year?
Correct
In a year (nonleap), there are 365 days. Each day has 24 hours; Each hour has 60 minutes; Each minute has 60 seconds. Th us, the total number of seconds in one year = 365 × 24 × 60 × 60 = 3.153 × 107 second.
If light travels a distance of 3 × 108 m in one second, then the distance travelled by light in one year = 3 × 108 × 3.153 × 107 = 9.46 × 1015 m. This distance is known as one light year.
1 Light year = 9.46 × 1015 m.Incorrect
In a year (nonleap), there are 365 days. Each day has 24 hours; Each hour has 60 minutes; Each minute has 60 seconds. Th us, the total number of seconds in one year = 365 × 24 × 60 × 60 = 3.153 × 107 second.
If light travels a distance of 3 × 108 m in one second, then the distance travelled by light in one year = 3 × 108 × 3.153 × 107 = 9.46 × 1015 m. This distance is known as one light year.
1 Light year = 9.46 × 1015 m. 
Question 44 of 46
44. Question
44. In terms of light year, Proxima Centauri is at what distance from Earth and the Solar System (and Earth)?
Correct
In terms of light year, Proxima Centauri is at 4.22 lightyears from Earth and the Solar System (and Earth).
Incorrect
In terms of light year, Proxima Centauri is at 4.22 lightyears from Earth and the Solar System (and Earth).

Question 45 of 46
45. Question
45. The Earth is located about how many lightyears away from the galactic centre?
Correct
The Earth is located about 25,000 lightyears away from the galactic centre.
Incorrect
The Earth is located about 25,000 lightyears away from the galactic centre.

Question 46 of 46
46. Question
46. What is the value of 1 ounce of liquid?
Correct
1 ounce = 30 ml; 1 quart = 1 litre
Incorrect
1 ounce = 30 ml; 1 quart = 1 litre
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