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General science Review for Grade 7

General science Review for Grade 7. RULES. Answer the following questions by writing the answer on your black boards with the use of a chalk. Questions will be read twice by the quiz master. Participants are to write their answers after the quiz master gave the signal to answer.

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General science Review for Grade 7

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  1. General science Review for Grade 7

  2. RULES • Answer the following questions by writing the answer on your black boards with the use of a chalk. • Questions will be read twice by the quiz master. • Participants are to write their answers after the quiz master gave the signal to answer. • If the participants are finished in writing the answer, they are to put their boards upside down. • Once the quiz master gave the signal to put it up, all participants whether finished or not should show their answers.

  3. RULES • Answers for Multiple choice questions should be written in CAPITAL LETTERS. Failure to follow would make the answer wrong. • Answers for identification and other related questions should be in correct spelling. WRONG SPELLING IS WRONG! • Participants are only to bring down and erase their work once the quiz master gave the signal.

  4. Any questions before we begin?

  5. Let’s start!!!

  6. Identify the following lab apparatus below. • A B C

  7. Answer A. beaker B. Test tube C. Stirring rod

  8. 2. Identify the following lab apparatus below. A B C

  9. Answer A. wire gauze B. evaporating dish C. mortar and pestle

  10. 3. Identify the following hazard symbols. A B C

  11. Answer A. toxic B. explosive C. corrosive

  12. 4. Which of the following is NOT a physical quantity? A. length B. temperature C. texture D. time

  13. Answer A. length B. temperature C. texture D. time

  14. 5. Which of the following is TRUE about mass? A. Mass is equal to the pull of gravity on an object. B. Mass is the amount of matter in a body. C. Mass is the amount of space occupied by an object D. Mass on earth is greater than mass on the moon.

  15. Answer A. Mass is equal to the pull of gravity on an object. B. Mass is the amount of matter in a body. C. Mass is the amount of space occupied by an object D. Mass on earth is greater than mass on the moon.

  16. 6. What is the formula for density?

  17. Answer Density = Mass Volume

  18. 7. The diagram below shows a metal block. What is the volume of the block in cubic centimeters?

  19. Answer 24 cm3

  20. 8. The mass of the block is 120 g. What is the density of the metal in g/cm3?

  21. Answer D= M/V = 120 g 24cm3 D = 5 g/cm3

  22. 9. A man board a bus at 12.48 p.m. and alighted at the end of his journey at 2.15 p.m. How long did the journey take?

  23. Answer 1 hour and 27 min

  24. 10. Which physical quantity refers to the distance between two specified points? A. volume B. mass C. length D. density C

  25. 11.Mercury, cooking oil and water are placed together in a tall glass jar. Their densities are 13.6 g/cm3, 0.8 g/cm3 and 1.0 g/cm3 respectively. Here they are shown together with a fourth layer, which may either be a cylindrical slab of wood in (a) or a thick oil in (b) and (c).

  26. 12. If a cylindrical slab of wood (having a density of 1.12 g/cm3) with the same diameter as the internal diameter of the glass jar is in the fourth layer of the jar, which is the most likely position it will occupy? C

  27. 13. What can you use to accurately measure the volume of water? A. beaker B. conical flask C. test tube D. measuring cylinder D

  28. 14.mass of the stone is 112 g and its volume is 20 cubic centimeters. What is the density of the stone? Express your answer in grams per cubic cm. 5.6 g/cm3

  29. 15. Find the volume of the given cuboid below. 338 800 m3

  30. 16. A girl cycles for 3hrs at a speed of 40 km/h. What distance did she travel? 120 km

  31. 17. A train travels at a speed of 3mph and travel a distance of 240 miles. How long did it take the train to complete it’s journey? 80 hours

  32. 18. At the equator, the earth spins a distance of 480miles every day. What speed does the Earth spin at in mph? 20 mph

  33. 19. Marc was told his dinner would be ready at 18:00. He left his house at 12:00 andtravelled in his car at an average speed of 45mph to his mum’s house 300 miles away. Did Marc make it home in time for dinner? No, he arrived at 18:40

  34. 20. Mr Dunn drives 64.8km from work at a speed of 48km/h. Mrs Dunn drives 81.2km from work at a speed of 58km/h. They both leave work at the same time. a. Who arrives home first? b. How many minutes later is it before the second person gets home? a) Mr Dunn. He takes 1.35 hours. Mrs Dunn takes 1.4 hours b) 3 minutes

  35. The classification of vertebrates is shown below. Use it to answer questions 21 and 22 Vertebrates Amphibians Birds Fish Reptiles

  36. 21. Which of the following can be put in the box. (mammals) 22. Which of the following cannot be classified under any of these groups? A. Cobra B. Crocodile C. Scorpion D. Shark (Scorpion)

  37. 23. Which of the following statements is correct? A. Adult amphibians can live on land only B. All birds can fly C. Mammals have hair or fur on their bodies D. Reptiles breathe through their skin Answer : C

  38. 24. Classify the following animals into appropriate groups according to the given key Ants flatworm scorpion snail Invertertates Have no legs Have legs poisonous Worm like no yes no yes

  39. Answer Ants flatworm scorpion snail Invertertates Have no legs Have legs Flatworm Ants Snail Scorpion poisonous Worm like no yes no yes Scorpion Ants Flatworm Snail

  40. 25. • State three characteristics of flowering plants. • State three differences between conifers and mosses. • State three similarities in flowering plants and ferns.

  41. Answer • Flowering plants produce flowers, reproduce by seeds, have underground roots. • Conifers reproduce by seeds but mosses reproduce by spores, conifers have true roots but mosses have no roots, conifers produce cones but mosses do not produce cones. • Both the flowering plants and ferns have roots and stems, have green leaves, can make their own food

  42. 26. a. Conifers, ferns and mosses belong to_______________plants. b. Name three flowering plants. ____________________________ c. Unlike conifers and ferns, masses do not have_____________ d. Conifers and flowering plants are reproduced by_________but ferns and mosses are reproduced by__________

  43. Answer • Non-flowering • Mango tree, rose and water lily • True roots • Seeds, spores

  44. 27. Mass of bottle drinking bottle = 180 g Mass of the bottle + water = 320 g Mass of the bottle + syrup = 348 g Find : • Mass of the water in the bottle =__________ • Vollume of the bottle =__________ • Mass of syrup in the bottle =__________ • Density of syrup =__________

  45. Answer • 140 g • 140 cm3 • 168 g • 1.2 g/cm3

  46. 28. Complete the table below by filling in the blanks.

  47. Answer

  48. Ribosome C. Cell Membrane • Chloroplast D. Mitochondria

  49. Answer

  50. Mention the name of organels in plant cell

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