Question

1. Assertion : In the side mirror of a car, the image of all objects appear smaller than the objects.
Reason: side mirrors are convex mirror
2. Assertion: Rainbow is an example of the dispersion of sunlight by the water droplets.
Reason: Light of shorter wavelength is scattered much more than light of larger wavelength.
3. Assertion: The air bubbles shines in water.
Reason: Air bubbles in water shines due to refraction of light.
4. Assertion : Water cycle maintains total water reserves on earth.
Reason: Water cycle involves continuous cycling of water into solid,liquid and gaseous forms of water.
5. Assertion: Water table at place does not vary.
Reason: Ground water is recharged by the process of infiltration.
Gateway International School,Neelankarai
Home Schooling, Science(Physics)
Grade VIII
Page 2
6. Assertion: Copper is widely used in electrical appliances
Reason: It is a very good conductor of electricity
7. Assertion: Bulb filament is made of tungsten
Reason: The filament should have low melting point.
8. Assertion: Battery is a combination of two cells only.
Reason: Th positive and negative terminals ar generaly marked on the cells.
9. Assertion: The distance moved by an object in unit time is called as speed.
Reason: Faster vehicles have higher speed.
10. Assertion :Speedometer records the speed of the vehicle generally in km/h
Reason: Odometer measures th distance moved by the vehicle in one

Answer 1

Answer:

all are correct byt 5 and 7 are not the correct explaination and 9 both are false