Question

(II)magnesi
Q31: Draw a les
germination of pol
Q32: (i)what is angle of deviati
(ii)with the help of labelled diagra
through a prism.
033: (U) what is ohm's law?
electrical heater rated 400 W operates 8hr a day
mnenrgy to operate it for 30 days at 3.00
ving 5 marks ea
of
Sunrise School, Bulandshahr
o
HALF YEARLY EXAMINATION 2020
CLASS X
Time:- 3:00 hours
SUBJECT SCIENCE
MM: 80
SECTION A: question no. 1 to 20 all questions and parts are of one mark
each, the answers of these questions must be given in one word and one
sentence.
21: the atomic no. of three element X,Y and Z are 3,22 and 17
espectively. state giving reason which two elements will show similan
hemical properties?
2
2: the refrective index of diamond is 2.42. what is the meaning of thi​

Answer 1

Answer:

The water cycle, also known as the hydrologic cycle or the hydrological cycle, describes the continuous movement of water on, above and below the surface of the Earth. The mass of water on Earth remains fairly constant over time but the partitioning of the water into the major reservoirs of ice, fresh water, saline water and atmospheric water is variable depending on a wide range of climatic variables. The water moves from one reservoir to another, such as from river to ocean, or from the ocean to the atmosphere, by the physical processes of evaporation, condensation, precipitation, infiltration, surface runoff, and subsurface flow. In doing so, the water goes through different forms: liquid, solid (ice) and vapor.