Over thousands of years, smaller pieces of rocks changed into soil under the combined effect of water, wind, roots of plants, temperature variations and mechanical collisions.
Over thousands of years, smaller pieces of rocks changed into soil under the combined effect of water, wind, roots of plants, temperature variations and mechanical collisions.
Light travel fastest in:
[B] Vacuum
[B] Vacuum
See less____________ is the structural and functional unit of the excretory system.
[B] Nephron Nephron is the structural and functional unit of excretory system.
[B] Nephron
See lessNephron is the structural and functional unit of excretory system.
During the preparation of hydrogen chloride gas on a humid day, the gas is usually fast through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to:
[C] absorb moisture from the gas Remember, calcium chloride is used as a drying agent which absorbs moisture from the hydrogen chloride (HCI) gas.
[C] absorb moisture from the gas
See lessRemember, calcium chloride is used as a drying agent which absorbs moisture from the hydrogen chloride (HCI) gas.
Name a natural indicator and a synthetic indicator.
(i) Natural indicator— Turmeric (ii) Synthetic indicator—Phenolphthalein
(i) Natural indicator— Turmeric
See less(ii) Synthetic indicator—Phenolphthalein
Explain how soil is formed.
Over thousands of years, smaller pieces of rocks changed into soil under the combined effect of water, wind, roots of plants, temperature variations and mechanical collisions.
Over thousands of years, smaller pieces of rocks changed into soil under the combined effect of water, wind, roots of plants, temperature variations and mechanical collisions.
See less