Since a sphere has 360 degrees, the Earth is divided into 360 longitudes. The meridian opposite the Prime Meridian (on the other side of the Earth) is the 180° longitude and is known as the anti meridian.
The top of the mesosphere, called the Mesopause, is the coldest part of Earth’s atmosphere. Temperatures in the upper mesosphere fall as low as −101 °C (172 K; −150 °F), varying according to latitude and season.
Neptune is the coldest planet in the universe and sees temperatures of below -210 degrees Celsius.
A. Earth
B. Mars
C. Jupiter
D. Mercury
If you look down at our planet from outer space, most of what you see is water; 71% of the planet’s surface is covered by ocean and it is because of this that the Earth is sometimes called “the water planet”. Only about three-tenths of our globe is covered with land.
A. Three
B. Four
C. Five
D. Seven
The bony cavity which contains the eyeball and its associated muscles, vessels, and nerves. In humans, seven bones make up each bony orbit.
In humans, seven bones make up the bony orbit:
A. Eyes
B. Nails
C. Gums
D. Nostrils
Gingivitis – inflammation of the gum at the necks of the teeth, and. Periodontitis – inflammation affecting the bone and tissues of the teeth
A. Nitrogen
D. Nydrogen
C. Neon and argon
D. Oxygen and nitrogen
MONOATOMIC MOLECULE:
Any element having only single atom is known as Mono atomic molecule.
Ex ;- All the noble gases such as helium, neon, argon etc.
A. Democritus
B. Bohr
C. Rutherford
D. Archimedes
Democritus was a Greek philosopher who was the first person to use the term atom (atomos: meaning indivisible). He thought that if you take a piece of matter and divide it and continue to divide it you will eventually come to a point where you could not divide it any more.
A. Michael Faraday
B. Oliver Evans
C. Thomas Edison
D. Horace Day
A. Spring
B. Summer
C. Winter
D. Autumn
In the northern hemisphere, the vernal equinox (March) conventionally marks the beginning of spring in most cultures and is considered the start of the New Year in the Assyrian calendar, Hindu, and the Persian or Iranian calendars, while the autumnal equinox (September) marks the beginning of autumn.