Combined Science Flashcards
6 cards from real N-LEVEL practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Combined Science flashcards as text
What is the chemical symbol for water?
Answer: H₂O
Water's chemical formula is H₂O — two hydrogen atoms bonded to one oxygen atom.
What force keeps us on the ground?
Answer: Gravity
Gravity is the force of attraction between all objects with mass. Earth's gravity pulls objects towards its centre, keeping us on the ground.
Which organ pumps blood around the body?
Answer: Heart
The heart is a muscular pump that circulates blood around the body, delivering oxygen and nutrients to all organs and tissues.
What gas do plants take in during photosynthesis?
Answer: Carbon dioxide
During photosynthesis, plants absorb carbon dioxide (CO₂) from the air and use it, along with water and sunlight, to produce glucose.
What is the state of matter with no fixed shape and no fixed volume?
Answer: Gas
A gas has no fixed shape and no fixed volume — it expands to fill any container. Its particles move rapidly and are far apart.
Which colour of light has the shortest wavelength in the visible spectrum?
Answer: Violet
In the visible spectrum, violet light has the shortest wavelength (highest frequency). Red has the longest wavelength (lowest frequency).
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Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- go.gov.sg — Eligibility, fees, test delivery, time limit · verified Oct 2026
- ask.gov.sg — Retake policy · verified Oct 2026
- seab.gov.sg — Score release, passing score · verified Oct 2026