The balanced equation for reaction of solid cesium with liquid water
= 2Cs + 2H2O → 2CsOH + H2
cesium react with liquid water to produce cesium hydroxide and hydrogen gas
that is 2 moles of Cs react 2 moles of H2O to form 2 moles CsOH and 1 of hydrogen gas
there are 8 moon phases.
They are - First quarter, waxing crescent, new, waning crescent, third quarter, Waning gibbous, full, and waxing gibbous
The classification of living things makes it easier for scientists to answer many important questions.
Examples:
-How many known species are there?
-What are the defining characteristics of each species?
-What are the relationships between these species?
"Aristotle," thought that everything was made from "earth", "air", "fire" and "water".
Option: D
Explanation:
"Aristotle" was against to "Atomic theory" so he believed that all the things were made from earth, air, fire and water called "four classical elements". These are "four classical elements" responsible for creating all the things in "terrestrial spheres". "Aristotle" started believing that all many of the little substances were "made up" of these "four classical elements" earth, air, fire and water. But "Aristotle" views on "elements" went wrong. "Aristotle" also grasped that "heavens" are created by using "weightless" and "unchangeable" the "fifth element" called "Aether".