JKBOSE 7th Class Model Paper Science

Class: VIIth Max. Marks: 50 Paper: Science Time Allowed: 3Hrs Model Test Paper Section A Multiple Choice Questions (10×1=10) Choose the Correct option: (Q1-Q3) Q1. The plant which traps and feeds on insects is: (i) Cuscuta (ii) China rose (iii) Pitcher plant (iv) Rose Q2. Which part of the plant takes in carbon dioxide from the air for photosynthesis? (i) Root hair (ii) Stomata (iii) Leaf veins (iv) Sepals Q3. Name the acid which is present in the sting of ants (a) Acetic acid (b) Formic acid (c) Oxalic acid (d) Tartaric acid Mark 'T' if the statement is true and 'F' if it is false: (Q4-Q5) Q4. During heavy exercise the breathing rate of a person slows down. (T/F) Q5. Plants carry out photosynthesis only during the day and respiration only at night. (T/F) Fill in the blanks: (Q6-Q8) Q6. The stomach releases hydrochloric acid and __________ juice which act on food. Q7. Image formed by a convex ___________is always virtual and smaller in size. Q8. The acid found in lemons is ____________acid. Assertion and Reasoning Type Questions (Q9-Q10). Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: A. Assertion and Reason both are correct and Reason is the correct explanation of Assertion. B. Assertion and Reason both are correct and Reason is not the correct explanation of assertion. C. Both are correct. D. Assertion is correct but the Reason is not correct. Q9. Assertion (A): Vascular tissue, conducts water and minerals from the soil to the top of the plant. Reason(R): Xylem vessels are responsible for the conduction of water. Q10. Assertion (A): Sugar is a neutral substance. Reason (R): A sugar solution turns red litmus blue.

Section B Very Short Answer Type Questions (Q11-Q18): (8×2=16) Q11.Why do organisms need to take food? Q12. Name the elements that determine the weather of a place. Q13.When are the maximum and minimum temperatures likely to occur during the day? Q14. Name two chemicals used to disinfect water. Q15. Mention two characteristic features of wind Pollinated flowers. Q16. What is an electric fuse? Q17. Name two factors on which the strength of an electromagnet depends. Q18. Define acid and bases. Section C Short Answer Type Questions (Q19-Q21): (3×3=9) Q19. List the similarities and differences between aerobic and anaerobic respiration. Q20. Explain the relationship between sanitation and disease. Q21. Draw the diagram of human excretory System and label its various parts. Section D Long Answer Type Questions (Q2-Q24): (3×5=15) Q22. Describe the digestive system of ruminants with the help of a suitable example. Or Name the type of carbohydrates that can be digested by ruminants but not by humans. Give the reason also. Q23. Describe the functions of the following: (i) Heart (ii) Blood vessels (iii) Red blood cells (iv) White blood cells (v) Platelets Or Describe, in brief, the circulatory system in human beings Q24. Differentiate between Concave and Convex Lenses. Or List a Few Uses of Spherical Mirrors