Name the element whose Latin name is – AURUM
GOLD
Nitrogen is the most abundant gas in the atmosphere (78%). What is the name of the biological process or the name of the specialized bacteria that converts this inert gas into ammonia for plants to use?
Nitrogen Fixation/
Rhizobium
Water boils at 100°C at sea level. How does a significant increase in altitude (and decrease in pressure) affect the temperature at which water begins to boil?
Boiling Point reduces as atmospheric pressure decreases
Thomas Edison famously tested thousands of materials for the light bulb's filament. What metal is used in modern incandescent bulbs due to its incredibly high melting point?
Tungsten
Paleontology is the study of fossils. In which type of rock layer are fossils almost exclusively found?
Sedimentary Rocks
Reason being these layers are formed by accumulation and compaction of sediments at relatively lower temp and pressure over a period of time, allowing organic remains to be preserved.
Why is distilled water a poor conductor of electricity but tap water conducts?
Tap water contains dissolved ions. Distilled water lacks ions, so poor conductor.
Why does a sharp knife cut better than a blunt one even if the same force is applied?
Pressure = Force/Area.
Smaller area (sharp edge) → greater pressure → easier cutting.
If chlorophyll absorbs mainly red and blue colour, why do plants look green?
Green light is reflected. Chlorophyll absorbs red and blue, reflects green.
A sealed plastic bottle partially filled with water is placed in a freezer.
It bursts. Which scientific principle explains this?
Water expands on freezing. Ice occupies more volume
A satellite remains in orbit without falling to Earth. Which two forces balance each other to maintain this motion?
Gravitational force and centripetal motion balance. Gravity provides required centripetal force.
Who is known as Father of Genetics?
Gregor Mendel
Name the Instrument used to measure electric current.
Ammeter