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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??…
Force and Pressure Summary: Force: Force Classification: Specific Non-Contact Forces: Pressure: Applications of Pressure: Pressure on Liquids: Applications of Liquid Pressure: Atmospheric Pressure: Astronauts and Space Suit: What is a Force?? Push or pull of an object is called as force. What are the effects of Force? Force can cause…
Grade 8, Biology “🌿 Welcome to Class 8 Biology! 📚 Explore the wonders of life with these intriguing chapter headings: 1. Define Reproduction? The production of new individuals by their parents is known as reproduction 2. Why reproduction is essential? 3. What are the two modes of reproduction? 4. Difference…
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…
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
Here is the List of chapters of class 7 Math’s Express Book. just click on the links to download the free PDFs. Chapter 1: Integers Chapter 2: Fractions Chapter 3: Decimals Chapter 4: Rational Numbers Chapter 5: Powers and Exponents Chapter 6: Algebraic Expression Chapter 7: Linear Equations Chapter 8:…