Q.2. Write short note on the following by giving their exact life span and contributions to the field of science (Accurate facts will be appreciated) (5 x 2)
(a) Umer Al Khayam (b) Zakariya Al Razi
Q.3. Differentiate between ANY FIVE of the following pairs. (2 x 5)
(a) Umbra and Penumbra (b) Heavy water and hard water (c) Smog and Smoke
(d) Myopia and Hypropia (e) Lava and Magma (f) Periscope and perimeter
(g) X-rays and Gamma rays
Q.4. Sun is a glorious star in our sky. Write down its characteristics with reference to the following data:
(a) Distance from earth (b) Mean distance from centre of galaxy
(c) Velocity around centre of galaxy (d) Revolution period around centre of galaxy
(e) Equatorial diameter (f) Rotation period at the equator
(g) Core temperature (h) Solar wind
(i) The lovely Diamond Ring effect (i) Future of sun
Q.5. Write briefly (not more than three to four sentences) about ANY FIVE of the following. (2 x 5)
(a) Allotropy (b) Nebula (c) Enrichment of Uranium
(d) Aqua Regia (e) Greenhouse effect (f) Igneous rocks
Q.6. (a) Define GENETIC ENGINEERING. In how many ways Genetic Engineering can be applied in different fields of life? Does it benefit society? Discuss. (1+3+2)
(b) What do the following scientific abbreviations stand for? (1/2 each)
(i) SONAR (ii) CNS (iii) PTFE (iv) LDL (v) SARS
(vi) GUT (vii) BASIC (viii) BTU
Q.7. (a) What are MINERALS? Discuss ANY TWO physical properties thereof. Also mention the names of four precious minerals of high commercial value.
(b) Define the following: (1 each)
(i) Amphibion (ii) Synchronous satellite (iii) Big Dipper
(iv) Fermentation (v) Millennium Bug
Q.8. (a) Define RECEPTORS in man. Name different receptor organs in human body. Also discuss ANY TWO of them briefly.
(b) Give scientific reasons of the following. (1 each)
(i) The dogs pant, the birds open their mouth and the elephants move rapidly their ears.
(ii) The manholes covers are generally round.
(iii) A geostationary satellite appears standstill to a viewer on the equator of earth.
(iv) We never see birds urinating.
(v) Pasteurized milk has more nourishment than the ordinary boiled milk.
Q.9. (a) Highlight the similarities and differences between animals and plants. (3+3)
(b) Write short note on ANY TWO of the following. (2 each)
(i) Teleprinter (ii) Dengue Virus (iii) Vacuum Cleaner