CBSE Science Practice Paper : Set VI
16. Write a short note on the layers of our Earth. 3
Answer :
17. Calculate the altitude for a earth’s satellite to be a geostationary satellite. 3
Answer :
18. What are galaxies and constellations’? Write two differences between them. What is the name and shape of our galaxy ? Write about asteroids seen in our .solar system. 5
Answer :
19. What is chemical formula of ethyl alcohol ? How is it prepared from sugarcane ? Name the process. Give chemical reactions involved. Give harmful effects of drinking alcohol.
Complete the following reactions :
20. Explain with a neat labelled ray diagram, the working of an Astronomical telescope ? 5
Answer :
21. Name one gland in human body which secretes digestive enzyme as well as hormone. 1
Answer :
22. Name the protein which gives red colour to the blood. 1
Answer :
23. Why is pituitary gland considered as a master gland ? 1
Answer :
24. Explain the terms (a) Zoophily and (b) Anemophily. 2
Answer :
25. What are environmental laws ? 2
Answer :
26. Explain the sex determination mechanism in human beings. 3
Answer :
27. What is Greenhouse effect ? Name two green house gases. What will happen to our earth if these gases are absent in the atmosphere ? 3
Answer :
28. Name the products of photosynthesis which play a vital role in your daily life. 3
Answer :
29. Name the various organic and inorganic components found in plasma of the blood. 3
Answer :
30. What are the various parts of a flower ? Explain with the help of a diagram the reproductive parts of a flower.
(i) Explain briefly the various methods of artificial vegetation. (ii) What is tissue culture ? Give two advantages of vegetative propagation. 2+3
Answer :
Pages: 1 2