Q1. Write comprehensive notes on any TWO of the following:
(a) Contribution of Muslim scientists in the field of biology.
(b) Water pollution.
Q2. Describe the various type of movements of the earth? What are the effects of these movements? Draw simple diagrams to illustrate your answer.
Q3. Explain the following using suitable examples.
(a) Feedback mechanism of human system.
(d) Carbon cycle
Q4. What is excretion? Name the excretory organs in man. Describe the structure and function of human kidney for the excretion of urine.
Q5. Describe the Principle, construction and working of a telephone?
Q6. What are latitudes and longitudes? How can the central line of latitude be used to find the location of a place?
Q7. Differentiate between:
(a) Cardiac Muscles and Skeletal Muscles.
(b) Haze and Smog.
(c) Enzyme and Hormone.
(d) Sedimentary Rocks and Igneous Rocks.
(e) Producers and Consumers. Q.8 Define the following terms:
(f) Control Unit
Q9. Discuss the structure of a typical animal cell in detail.
Q10. Fill in the blanks with appropriate words:
(a) Monomer of proteins are_____________________________.
(b) Water transport in plants occurs within ______.
(c) Underground horizontal stems are called_________________.
(d) In the eye, only __ contain receptors for light energy.
(e) Plant ____ control plant responses to environmental stimuli.
(f) _ are often called the power houses of the cell.
(g) The rate at which a current changes direction is called its _.
(h) The energy of electrons at the negative terminal of a battery is called
(i) ____________is the smallest planet of the solar system. (j) Diamond is an allotropic form of the element______________.
Q11. Which are plastics? Name their different types and processes by which they are manufactured. Discuss the impact of the use of plastics on the environment.
Q12. Which of the following statements are False and which are True:
(a) In the circulatory system two pulmonary arteries take blood from the left ventricle to the lungs.
(b) Anaphase is the stage of mitosis during which the daughter chromosomes move towards the poles.
(c) The Motor neurons carry nerve impulses from the central nervous system to the effectors.
(d) Cochlea is a part of the middle ear.
(e) Tides happen due to the moon gravitational pull.
(f) Heavy water contains salts of Calcium and Magnesium.
(g) All non-metals exist in gaseous state.
(h) A parachute can be used by a spaceman to help in landing on the moon.
(i) The gemstones Ruby and sapphires are composed of Aluminum Oxide.
(j) In a chemical battery chemical energy ions directly converted into mechanical energy.
Q13. Choose the correct answers.
(i) Speed of the wind is measured by:
(a) Barometer (b) Hygrometer (c) perimeter
(d) Anemometer (e) None of these.
(ii) _ connects the muscle with the bone.
(a) Cartilage (b) Ligament (c) Tendon (d) Disc (e) None of these.
(iii) Polio is caused by :
(a) Bacterial (b) Virus (c) Fungus (d) Deficiency of vitamin (e) none of these.
(iv) The coldest planet of the solar system is:
(a) Earth (b) Venus (c) Mars (d) Pluto (e) None of these
(v) ____ is a vitamin:
(a) Citric acid (b) Tartaric acid (c) Ascorbic acid (d) Acetic acid (d) none of there
(vi) An eggshell is composed of:
(a) Iron (b) Starch (c) Carbon (d) Protein (e) None of these.
(vii) The most abundant element in the earth crust is:
(a) Nitrogen (b) Silicon (c) Carbon (d) Oxygen (e) None of these
(viii) The main constituent of Biogas is:
(a) Methane (b) Hydrogen (c) Oxygen (d) Carbon dioxide (e) None of these.
(ix) Stalagmites are deposits of :
(a) Calcium oxide (b) Calcium sulphate (c) Calcium hydroxide (d) Calcium carbonate (e) Mixture of all salts.
(x) Gigantism is the result of:
(a) Hypothyroidism (b) Recessive gene (c) Hyper pituitarism (d) Vitamin D deficiency (e) None
Q14. What are the causes of Earthquakes: How have earthquakes helped in deciphering
the internal structure of the earth?
Q15. What is the endocrine system? Write the names and function of any eight endocrine
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