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Answers
Required Answer :-
Q1. Fill in the blanks
1. Salt is separated from sea water by the process of __
Ans - Evaporation
2. Cardboard is a __ object
Ans - Opaque
3. An electric cell has __ terminals
Ans - 2
4. In olden days sailors used to find direction by suspending a piece if __
Ans - Magnet
5. __ is an example of luminous body
Ans - Sun
6. Paper is not a __ material
Ans - Transparent or Translucent
7. A device that is used to break an electric circuit is called __
Ans - Switch
8. Impurities settle at the bottom when muddy water was kept overnight in a bucket __.
Ans - decantation
9. The clear water was then poured off the top. The process of separation used in this example is used __
Ans - sedimentation and decantation
Q II. True or False
1. Oxygen does not support burning.
Ans - False
2. A cylindrical has only two pole.
Ans - False
3. A pinhole camera does not have a big hole.
Ans - True
4. Separation of sugar from tea can be done by filtaration
Ans - False
5. Rubber is a magnetic material
Ans - False
6. A mixture of milk and water can be separated by decantation.
Ans - True
7. A brick wall is an example of opaque object.
Ans - True
8. Component of air used by green plant to make their food is carbon dioxide.
Ans - True
Q III. On word answers :-
Backbone is also known as
Ans - spinal column
Darkest part of a shadow is called
Ans - umbra
Compound of iron present in lodestone
Ans - magnetite
Device that converts wind energy to generate electricity
Ans - wind turbine
An example of immovable joint
Ans - Joint at skull
Q1 1. distillation
2. opaque
3. 2
4. sailors used to find direction by suspending a piece of bar magnet.
5. fire flies , sun, light, fire ect..
6. magnetic
7. switch
8. Sedimentation and decantation.
Q2 1. false
2. true
3. true
4. true
5. false
6. false
7. true
8. true
Q3 1. spine
2. umbra
3. magnetite
4. windmills
5. sutures