science quizz

it is a substance that dissolves in the solvent

• solution

• suspension

• solute

which of the following is insoluble in water?

• table salt

• oil

• sugar

• washing soda

solubility increases with the increase in

• volume

• mass

• pressure

• temperature

name the simple machine

• screw

• hammer

• pulley

• inclined plane

why sun is also a star?

• it is bigger

• reflects light

• gives out light

• it is smaller

following are some clues

1. image is real

2. caved surface is shiny

• plain mirror

• concave mirror

• convex mirror

which one of the following are correct properties of periscope?

• image is virtual

  image is upright

• image is inverted

  image is opposite size

• reflected rays are parallel

  image is formed in screen

which one of the following is true

• telescope is used in submarines

• telescope is used to examine space

the orbit of comet has this shape

• spherical

• circular

• square

• elliptical

identify these diagrams

• both irregular reflection

• 1. regular

  2, irregular

• both regular

• all of these