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What are the most important natural resources? Air and Water Define Pollution?? Contamination of natural resources like air and water by addition of toxic and poisonous substance due to various human activities is called Pollution. Define Pollutant and give some examples?? When does a substance become pollutant?? Define Air Pollution??…
Class 8 Physics Chemistry Biology
Chapter 10: Visualising Solid Shapes Ex 10.1 1. For each of the given solid, the two views are given. Match for each solid the corresponding top and front views. 2. For each of the given solid, three views are given. Identify each solid corresponding Top, Front and side views? 3.…
List of all the Class 8 Maths Chapters Link Useful links: CBSE CLASS 6 SOCIAL SCIENCE CBSE CLASS 6 SCIENCE CBSE CLASS 7 SOCIAL STUDIES CBSE CLASS 7 MATHS CBSE CLASS 8 MATHS CBSE CLASS 8 SCIENCE
Ncert Class 8 Chapter 1: Rational Numbers Hand notes (Click on the sums to get the answers) Ex 1.1 Rational Numbers Using appropriate properties find i) -2/3 * 3/5 + 5/2 -3/5 + 1/6 ii) 2/5 + (-3/7) -1/6 * 3/2 + 1/14 * 2/5 2. Write the additive inverse…
Ex 2.1 Solve the following equations: 1. x – 2 = 7 2. y + 3 = 10 3. 6 = z + 2 4. 3/7 + x = 17/7 5. 6x = 12 6. t/5 = 10 7. 2x/3 = 18 8. 1.6 = y / 1.5 9. 7x…
Ex 3.1 1. Given here are some figures. Classify each of them on the basis of the following. (a) Simple curve (b) Simple closed curve (c) Polygon (d) Convex polygon (e) Concave polygon2. What is a regular polygon?State the name of a regular polygon of(i) 3 sides (ii) 4 sides…
Chapter 4: Practical Geometry Ex 4.1 1. Construct the following quadrilaterals. (i) Quadrilateral ABCD. AB = 4.5 cm, BC = 5.5 cm, CD = 4 cm, AD = 6 cm, AC = 7cm (ii) Quadrilateral JUMP JU = 3.5 cm, UM = 4 cm, MP = 5 cm , PJ…
Ex 5.1 Data Handling 1. For which of these would you use a histogram to show the data? (a) The number of letters for different areas in a postman’s bag. (b) The height of competitors in an athletics meet. (c) The number of cassettes produced by 5 companies. (d) The…
Chapter 6: Squares and Square Roots Ex 6.1 1. What will be the unit digit of the squares of the following numbers? (i) 81 (ii) 272 (iii) 799 (iv) 3853 (v) 1234 (vi) 26387 (vii) 52698 (viii) 99880 (ix) 12796 (x) 55555 2. 2. The following numbers are obviously not…