Curious Comparisons

Which is heavier: a liter of mercury or a liter of water?
A liter of mercury
Which is older: the Great Pyramid of Giza or Stonehenge?
Stonehenge
Which is bigger: Russia or Pluto in surface area?
Russia
Which is longer: the Amazon or the Nile River?
The Nile River
Which weighs more: a kilogram of feathers or a kilogram of steel?
They weigh the same
Which is taller: the Eiffel Tower or the Empire State Building?
Empire State Building
Which is colder: Mars or Antarctica?
Mars
Which country has more people: India or China?
India
Which is older: the moon or the Earth?
The Earth
Which is deeper: Lake Baikal or the Mariana Trench?
Mariana Trench
Which travels faster: light or electricity in a wire?
Light
Which is more massive: the Sun or all the planets in the solar system combined?
The Sun
Which is hotter: the surface of the Sun or molten lava?
The surface of the Sun
Which has usually a longer lifespan: a tortoise or a parrot?
A tortoise
Which is closer to Earth: the Moon or the International Space Station?
The International Space Station
Which contains more bones: a shark or a human?
A human — sharks have cartilage instead of bones
Which is heavier: gold or lead, by volume?
Gold — it has a higher density than lead
Which is more energy efficient: an LED bulb or an incandescent bulb?
An LED bulb

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