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
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.
What is the chemical formula of water?
Answer: H₂O
Water's chemical formula is H₂O, consisting of two hydrogen atoms and one oxygen atom.
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.
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.
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.
What is the hardest natural substance on Earth?
Answer: Diamond
Diamond is the hardest known natural material, scoring 10 on the Mohs hardness scale.