Here are 10 one-word answer type questions from the topic Measurement of Time with their answers and explanations:
Topic: Measurement of Time
Measurement of time refers to the method of calculating time intervals using periodic events like sunrise, sunset, revolution of the Earth, and instruments like clocks and watches.
1. Question: What is the basic unit of time?
Answer: Second
Explanation: The basic unit of time in the SI system is the second, denoted as ‘s’.
2. Question: What instrument is used to measure short time intervals in sports?
Answer: Stopwatch
Explanation: A stopwatch is used to measure short time intervals accurately, such as in races.
3. Question: Which device was used in ancient times to measure time by the position of the sun?
Answer: Sundial
Explanation: A sundial measures time based on the position of the shadow cast by the sun.
4. Question: The time between one sunrise and the next is called a ___________.
Answer: Day
Explanation: A day is the time interval from one sunrise to the next, used to measure time naturally.
5. Question: What is the time taken by the Earth to complete one revolution around the Sun called?
Answer: Year
Explanation: One year is the time taken by the Earth to complete one revolution around the Sun.
6. Question: Which device uses the periodic motion of a pendulum to measure time?
Answer: Clock
Explanation: Pendulum clocks use the to and fro periodic motion of a pendulum to measure time.
7. Question: What is the time taken by a pendulum to complete one oscillation called?
Answer: Time period
Explanation: Time period is the time taken by a pendulum to complete one full to and fro motion.
8. Question: What kind of motion does the pendulum of a clock show?
Answer: Periodic
Explanation: The pendulum shows periodic motion because it repeats its motion at regular intervals.
9. Question: Which scientist observed the motion of a lamp and contributed to the discovery of the pendulum’s constant time period?
Answer: Galileo
Explanation: Galileo noticed the regular swinging of a lamp, leading to the discovery of the pendulum’s constant time period.
10. Question: What type of clock is more accurate than a pendulum clock?
Answer: Quartz
Explanation: Quartz clocks are more accurate because they use electric circuits and oscillating crystals to measure time precisely.
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