Science Class 8

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Mathemagichub

Science Class 8

Science

1 / 50

Define force and give its SI unit.

2 / 50

Explain the concept of momentum and its conservation.

3 / 50

What is the role of meristematic tissue in plants?

4 / 50

Explain the concept of valency in chemistry.

5 / 50

Write the chemical formulae for the following compounds: water, carbon dioxide, and sodium chloride.

6 / 50

Define motion and rest.

7 / 50

What are mitochondria, and what is their role in a cell?

8 / 50

Describe the characteristics of Monera and give examples.

9 / 50

Differentiate between a vertebrate and an invertebrate.

10 / 50

Explain Newton's first law of motion.

11 / 50

Define acceleration and state its SI unit.

12 / 50

What is matter?

13 / 50

Define a mixture and provide an example.

14 / 50

What is an atomic number?

15 / 50

Explain the characteristics of particles of matter.

16 / 50

Discuss the Bohr's model of the atom.

17 / 50

How does sublimation differ from evaporation?

18 / 50

Explain the classification of living organisms into five kingdoms.

19 / 50

What is the universal law of gravitation?

20 / 50

What happens to the rate of evaporation when the surface area of the liquid is increased?

21 / 50

Describe the structure and function of the nucleus.

22 / 50

What is inertia? How is it related to mass?

23 / 50

Differentiate between a homogeneous and a heterogeneous mixture.

24 / 50

How does the modern atomic model differ from Bohr's model?

25 / 50

Define evaporation. How does it take place?

26 / 50

Describe the process of diffusion with an example.

27 / 50

Explain the types of plant tissues and their functions.

28 / 50

Define a cell and list its basic functions.

29 / 50

Define an atom and a molecule.

30 / 50

What is free fall, and how does it relate to acceleration due to gravity?

31 / 50

What is a colloid? Provide an example.

32 / 50

Explain the concept of uniform motion.

33 / 50

Explain the structure and function of the cell membrane.

34 / 50

Describe the four major types of animal tissues.

35 / 50

What is the difference between speed and velocity?

36 / 50

What are isotopes? Provide an example.

37 / 50

Describe the process of diffusion with an example.

38 / 50

Explain the concept of the boiling point of a substance.

39 / 50

Describe the concept of escape velocity and its significance.

40 / 50

Explain the concept of the boiling point of a substance.

41 / 50

Define tissue. How are plant tissues different from animal tissues?

42 / 50

How does sublimation differ from evaporation?

43 / 50

Differentiate between simple and compound tissues in plants.

44 / 50

Differentiate between solids, liquids, and gases based on their characteristics.

45 / 50

Differentiate between plant cells and animal cells.

46 / 50

What is the law of conservation of mass?

47 / 50

What is the difference between positive and negative acceleration?

48 / 50

Explain the Rutherford model of the atom.

49 / 50

Define the term 'boiling point elevation.'

50 / 50

Why do objects weigh less on the Moon compared to Earth?

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Maths Test

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Mathemagichub

Maths Class 8

Maths

1 / 36

Expand and simplify the expression: (x - 3)(x + 3).

2 / 36

Solve the equation 2x - 5 = 7 to find the value of x.

3 / 36

If 3x - 4 = 11, what is the value of x?

4 / 36

Simplify the expression: 3x - 2y + 5x + 3y.

5 / 36

Identify the type of quadrilateral with all sides of equal length and all angles of equal measure.

6 / 36

Find the least number which must be subtracted from 3375 to make it a perfect cube.

7 / 36

If the ratio of the ages of two friends is 5:3 and the older friend is 21 years old, how old is the younger friend?

8 / 36

Express 5^3 in exponential notation.

9 / 36

Determine the square root of 169.

10 / 36

Determine the surface area of a sphere with a radius of 6 cm. Use π (pi) as 22/7.

11 / 36

Construct an isosceles triangle with a base of 6 cm and equal angles of 70 degrees each.

12 / 36

Simplify the expression: (3^4) / (3^2).

13 / 36

Calculate the volume of a cylinder with a radius of 4 cm and height 10 cm. Use π (pi) as 22/7.

14 / 36

Calculate 2^5.

15 / 36

Calculate the perimeter of a rectangle with length 6 cm and width 4 cm.

16 / 36

Calculate the total number of vertices in a cube.

17 / 36

Find the least number which must be added to 1056 to make it a perfect square.

18 / 36

If the cost of 5 pens is Rs. 30, what is the cost of 12 pens?

19 / 36

Construct an angle of 60 degrees using a compass and ruler.

20 / 36

Calculate the mean (average) of the following set of numbers: 10, 15, 20, 25, and 30.

21 / 36

Identify the 3D shape that has 6 faces, all of which are rectangles.

22 / 36

Determine the number of edges in a triangular pyramid.

23 / 36

Calculate the sum of the rational numbers 3/5 and 1/3.

24 / 36

Factorize the expression: 6x² - 18x.

25 / 36

Calculate the value of √144 + √25.

26 / 36

A shopkeeper offers a discount of 15% on a shirt priced at Rs. 800. Calculate the discounted price.

27 / 36

Using a compass and ruler, construct a perpendicular bisector of a line segment AB, where AB measures 10 cm.

28 / 36

Calculate the median of the data set: 8, 12, 15, 18, 20, 22, 25, 30, 35.

29 / 36

Given the data: 12, 14, 18, 12, 16, 14, 20, 12, 16, 14, find the mode.

30 / 36

Calculate the value of 4³ - 3³.

31 / 36

Solve the equation 2(x + 3) = 14 to find the value of x.

32 / 36

Find the area of a rectangle with length 8 cm and width 5 cm.

33 / 36

Determine the sum of the angles in a quadrilateral.

34 / 36

Determine whether the following numbers are rational or irrational: 5/8, √25, and 0.333...

35 / 36

Express the rational number 9/12 in its simplest form.

36 / 36

Determine the cube root of 343.

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