পুনর্বিন্যাসকৃত সিলেবাস অনুসারে
Although the Earth revolves around the Sun, from our point of view we see the Sun moving around the sky along an imaginary circle called the ecliptic once every 365.256 days. This is known as the sidereal year. The ecliptic crosses the equator twice a year. On March 20, known as the vernal (spring) equinox, the Sun starts its northward journey from the equator to word the Tropic of Cancer. The interval of time from one vernal equinox to the next, known as tropical year, is 365.242 days. The southward motion of the Sun from the equator start on September 22 and the day is called autumnal equinox. On these dates, day and night become equal 10 at all latitudes.
Words: a. revolve (synonym) b. view (synonym) c. imaginary (antonym)
d. known (antonym) e. start (synonym) f. journey (antonym) g. interval (antonym) h. motion (synonym) i. start (antonym)
j. equal (antonym).
Set 11: a. move b. see c. real d. unknown e. begin f. rest g. continuation h. speed i. finish j. unequal.
মনোয়ারুল ইসলাম, সহকারী অধ্যাপক, ঢাকা স্টেট কলেজ, ঢাকা