Puzzles on Fundamental Quantities
Puzzle 1
How many fundamental quantities are there in physics?
Hint: Think about the basic physical quantities that do not depend on others.
Answer: 7 fundamental quantities.
Puzzle 2
Which fundamental quantity is measured in kilograms?
Hint: It is a measure of how much matter is in an object.
Answer: mass (kg).
Puzzle 3
What is the SI unit of time?
Hint: It is based on the ticking of an atomic clock.
Answer: second (s).
Puzzle 4
Which fundamental quantity is measured in meters?
Hint: It is used to measure the length of an object.
Answer: length (m).
Puzzle 5
What is the SI unit of electric current?
Hint: It is named after a French scientist.
Answer: ampere (A).
Puzzle 6
Which fundamental quantity is measured in kelvin?
Hint: It measures how hot or cold something is.
Answer: temperature (K).
Puzzle 7
Which fundamental quantity is used to measure the amount of a substance?
Hint: Its SI unit is the mole.
Answer: amount of substance (mol).
Puzzle 8
What is the SI unit of luminous intensity?
Hint: It is used to measure the brightness of light.
Answer: candela (cd).
Puzzle 9
Which fundamental quantity is used to measure the duration of an event?
Hint: It is measured in seconds, minutes, or hours.
Answer: time (s).
Puzzle 10
How many fundamental quantities have SI units named after scientists?
Hint: Think of ampere, kelvin, and candela.
Answer: Three – ampere (A), kelvin (K), and candela (cd).
