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Grade 8, Science Chemistry Define Combustion?? Difference between Combustible and Non combustible substances?? Combustible substances Non combustible substances Substances that burn easily in air to produce heat and light are called combustible substances Substances that do not burn in air are called Non combustible substances Ex: Cloth, Wooden stick, dry…
Grade 8, Physics Tuning fork: How do sound travels?? Define Medium?? Speed of the sound: Speed of the sound in Sound travels in the form of waves Waves are characterized by frequency amplitude and time period Simple pendulum It consist of a small metal Bob suspended by long thread from…
Define light? Define Reflection? Reflection is the phenomenon of bouncing back of light in the same medium in which it was travelling when it falls on the surface. Important terms Incident ray The Ray of light that falls on the mirror reflecting surface is called Incident ray. Point of incidence…
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
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 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…
Chapter 7: Cubes and Cube Roots Ex 7.1 1. Which of the following numbers are not perfect cubes? (i) 216 (ii) 128 (iii) 1000 (iv) 100 (v) 46656 2. Find the smallest number by which each of the following numbers must be multiplied to obtain a perfect cube. (i) 243…