solve it and don't spam
Answers
Answer:
1.the two uses of concave mirrors are:
-used in reflecting telescopes
-used to provide a magnified image of the face for applying make-up or shaving
2.Stomata are tiny pores or opening on the surface of a leaf.the functions if stomata are:
-exchange of gases
-loss of water in the form of vapour during transpiration
3.Self-pollination increases genetic uniformity and decreases genetic variation. Cross-pollination decreases genetic uniformity and increases genetic variation.
4.the two chemicals used to disinfect water are:
-ozone
-chlorine
5.Virtual image refers to the image which forms when the light rays appear to meet at definite point, after reflection from the mirror.
A virtual image is formed when reflected rays appear to meet. Such images cannot be obtained on screen. Plane mirrors, convex mirror and concave lens always forms virtual image.
6.The groundwater gets recharged through the process of infiltration. Infiltration means seeping of water from rivers and lakes into the empty spaces and cracks deep below the ground.
7.The two effects of electric current are:
-heating effect
-magnetic effect
8.Oils and fats should not be released in drains because they harden the soil in the pipes and block them.
9.There is no waste in the forest because decomposers convert all the dead bodies of the plants and animals into the humus which gets added to the soil.