Tamil AKKA Anna ANSWER THIS OUR ANGEL MATRIC.HR.SEC. SCHOOL
VALASARAVAKKAM, CHENNAI – 87
SUMMATIVE ASSESSMENT - II – ____ of the following are endothermic changes.
a) condensation and melting b) condensation and freezing c) Evaporation
and melting d) Evaporation and freezing.15. Unicellular organisms can only be seen under a ____
16. The direction of conventional current is ___ to electron flow.
17. Filling up a balloon with hot air is a ____ change.
18. Species is the ___ unit of classification.
19. The binomial name of onion is ____
20. Carolus Linnaeus is known as the Father of ____
Ill.MATCH THE FOLLOWING: 10×1=10
21. Heat – safety device used in electric circuit.
22. Fuse – used to open or close a Circuit.
23. Switch – water to steam.
24. Melting – a form of energy
25. Evaporation – ice cube to water
26. Transporting channel – Nucleus
27. Suicidal bag – Endoplasmic Reticulum
28. Control Room – Lysosome
29. Power house – chloroplast
30. Food producer – mitochondria
IV. True or False: 10 X 1 =10
31. Electron flow is in the same direction to conventional Current flow.
32. In a parallel circuit , the electric components are divided into branches.
33. Cutting of cloth is an example of a periodic change.
34. Taking a glass of water and freezing it by placing it in the freezer is a
chemical change.
35. The electrical conductivity of the semiconductor is in between a conductor
and an insulator.
36. Animal cells have a cell wall.
37. Cell membrane is fully permeable.
38. Only plant cells have chloroplasts.
39. Human stomach is an organ.
40. Ribosomes are small organelles with a cell membrane.
V . ANALOGY: 5 × 1 = 5
41. Water: pipe : : Electric current: _____
42. Physical change: Boiling :: chemical change ______
43. Adipose:tissue:: eye: ____
44. Cell wall: plant cell:: Centriole :____
45. Copper: conductor:: Wood : ____2020 – 2021
SCIENCE – VII STANDARD
TIME :2:30 HRS MARKS: 100
Answers
Answered by
2
Answer:
15. microscope
36. true
39. true
38. true
21. a form of energy
22. safety device used in electric circuit
23. used to open or close a circuit
24. ice cubes to water
25. water to steam
27. lysosome
28. nucleus
29. mitochondria
19. Allium cepa
Answered by
1
Answer:
it's ok friend .......
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