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Scienece assignment (Class 7)

  1.      Name the process by which green plants prepare their food. 2.      Which gas is released during photosynthesis ? 3.      Define physical change with one example. 4.      What are vertebrates ? Give two examples. 5.      Why do objects float or sink in water? 6.      Name the three states of matter. 7.      What is soil erosion , and mention one cause of it. 8.      Which organ in the human body pumps blood? 9.      What type of energy is stored in food? 10.   Why should we conserve forests?
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Science assignment (Class 8)

  1.      Define cell . Who discovered the cell? 2.      What is the difference between atoms and molecules ? 3.      Name the process by which liquid changes into gas. 4.      What is friction ? Mention one advantage and one disadvantage. 5.      What are renewable sources of energy ? Give two examples. 6.      Explain respiration in humans. 7.      What is the function of red blood cells ? 8.      Why is water called a universal solvent ? 9.      Define force and name any two types of forces. 10.   What is global warming ?
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Science assignment (Class 9)

  1.      State Newton’s First Law of Motion . 2.      What is the SI unit of force ? 3.      Define density and write its formula. 4.      What is the difference between elements, compounds, and mixtures ? 5.      Write the chemical formula of calcium carbonate . 6.      What is photosynthesis ? Write its word equation. 7.      Define work in scientific terms. 8.      What is refraction of light ? 9.      Name the parts of the human heart . 10.   What is natural selection ?
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