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Everyday Science Concepts Flashcards

6 cards from real NTS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Everyday Science Concepts flashcards as text

  1. Which vitamin is produced by the human body when exposed to sunlight?

    Answer: Vitamin D

    Vitamin D is synthesized in the skin when exposed to ultraviolet B (UVB) radiation from sunlight.

  2. What is the chemical formula of water?

    Answer: H₂O

    Water's chemical formula is H₂O, consisting of two hydrogen atoms and one oxygen atom.

  3. Which planet is known as the 'Red Planet'?

    Answer: Mars

    Mars is called the Red Planet due to iron oxide (rust) on its surface giving it a reddish appearance.

  4. What is the boiling point of water at sea level?

    Answer: 100°C

    Water boils at 100°C (212°F) at standard atmospheric pressure at sea level.

  5. Which gas do plants absorb during photosynthesis?

    Answer: Carbon Dioxide

    Plants absorb carbon dioxide (CO₂) from the atmosphere and use it with water and sunlight to produce glucose and oxygen.

  6. What is the hardest natural substance on Earth?

    Answer: Diamond

    Diamond is the hardest known natural material, scoring 10 on the Mohs hardness scale.

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