History
Earth
Plague
Maths and friends
Free points
100

How was language first created

a derivation of humans' daily gestures, used to convey thoughts and feelings

100
Why is the moon drifting away from Earth

Earth's tides cause a loss of momentum, speeding the moon; therefore making it drift away from Earth.


100
What led to the outbreak of cholera

contaminated water supplies during the 1850s

100

Explain the Pythagoras theorem

a2  + b2 = c2  ( a,b as the right-triangle sides and c as the hypothenuse )

100
Which is spelled correctly: skeptical or sceptical
both
200

How did the meterorite which annihilated the dinosaurs change the Earth's atmosphere

Causing volcanic eruptions -> making the temperatures skyrocket beyond control -> arousing more greenhouse gas effects ( CO2,.... )

200
What is the deepest depth of the ocean humans can probe until now

11 kilometers


200

What's the formula to calculate a circle's perimeter

2πr = dr

200
What is the equation for x2 - 5x + 4 after being factorised

( x - 4 )( x - 1 )

300
Why was facism feared by civilians

spiteful authorization and typically a fiend itself

300
What's the length of the Earth's circumference

24,901 kilometers

300
Why are matters heated while being burnt

Fire provokes the speed of molecules, speeding them up then results in the rise of the matter's temperature.

400
Who was America's first president

George Washington DC

400
Why do continents shift everyday

being situated on tectonic plates rock, which constantly moving daily

400
What is the general formula of alkane

CnH2n+2 ( n is a positive integer )

500

Viet Nam belongs to which continent

Asia

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