Science facts
This Science set covers the basics of chemistry, physics, biology and space. The questions lean towards ideas you can actually see around you, such as why Mars looks red or which vitamin sunlight helps your body make.
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What is the chemical symbol for gold?
Gold’s chemical symbol is Au, which comes from its Latin name, aurum.
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Which gas do plants absorb from the air for photosynthesis?
Plants absorb carbon dioxide for photosynthesis and release oxygen as a by-product.
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Which planet is known as the Red Planet?
Mars is known as the Red Planet because iron oxide, or rust, gives its surface a reddish colour.
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Roughly how fast does light travel in a vacuum?
Light travels at about 300,000 km per second in a vacuum, so sunlight reaches Earth in around eight minutes.
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At what temperature does water boil at sea level?
Water boils at 100 °C at sea level, and at lower temperatures high up in the mountains where air pressure is lower.
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Which part of a cell is known as its powerhouse?
Mitochondria are called the powerhouse of the cell because they produce most of its usable energy.
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How many bones does an adult human body have?
An adult human has 206 bones. Babies are born with around 300, and many fuse together as they grow.
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Which gas makes up most of Earth’s atmosphere?
Nitrogen makes up about 78 percent of Earth’s atmosphere, while oxygen makes up about 21 percent.
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Which force pulls objects towards the Earth?
Gravity pulls objects towards the Earth, and it also keeps the planets in orbit around the Sun.
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Which vitamin does your skin make when exposed to sunlight?
Skin makes vitamin D when exposed to sunlight, and the body needs it to absorb calcium for healthy bones.
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Which element has the atomic number 1?
Hydrogen has the atomic number 1 and is the most abundant element in the universe.
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Which is the largest planet in our solar system?
Jupiter is the largest planet in the solar system, with more mass than all the other planets combined.
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Which blood type is known as the universal donor for red cells?
O negative is known as the universal red cell donor type because it can be given to patients of any blood group.
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A solution with a pH below 7 is called what?
A solution with a pH below 7 is acidic, a pH above 7 is basic, and pure water sits at a neutral 7.
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Which metal is liquid at ordinary room temperature?
Mercury, with the symbol Hg, is the metal that stays liquid at ordinary room temperature.