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Class 8 Cell Structure and Functions Robert Hooke coined the term “Cell” in Latin cell means “Little room” He observed The Cork (the bark of the tree) under the microscope Cell Theory was proposed by German Biologist Cell Theory Two instruments are used to study the cells, they are Compound…
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??…
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, Science- Chemistry Embark on a fascinating journey into the realm of the chemical effects of electric current in this lesson. 1. Define Electrical energy? 2. Difference between Conductors and Insulators? Conductors Insulators Materials that allow electricity to flow through them easily are called as Conductors Materials that do…
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 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…