Night-sky observation is shaped by the (17) .......... nature of the weather and by the (18) .......... of the sky at any given time. Unless entries are (19) .......... dated and located, the data become far less (20) .......... to researchers.
For many participants, the main motivation is sheer (21) ........... Yet the value of a report often depends on the (22) .......... of what has been seen. Only then can records from different locations be (23) .........., and only then does their (24) .......... become clear. Volunteer observers also learn to distinguish a genuine astronomical event from an effect produced by aircraft, satellites or changes in the atmosphere, a habit that takes considerable time to develop.
The most useful entries include details that may seem minor at first: the direction of a light, the time at which it appeared and the conditions under which it disappeared. Recording such information consistently allows later observers to decide whether two reports describe the same event. The school has found that careful habits matter more than expensive equipment. This is a lesson that beginners quickly learn.
Night-sky observation is shaped by the (17) .......... nature of the weather and by the (18) .......... of the sky at any given time. Unless entries are (19) .......... dated and located, the data become far less (20) .......... to researchers.
For many participants, the main motivation is sheer (21) ........... Yet the value of a report often depends on the (22) .......... of what has been seen. Only then can records from different locations be (23) .........., and only then does their (24) .......... become clear. Volunteer observers also learn to distinguish a genuine astronomical event from an effect produced by aircraft, satellites or changes in the atmosphere, a habit that takes considerable time to develop.
The most useful entries include details that may seem minor at first: the direction of a light, the time at which it appeared and the conditions under which it disappeared. Recording such information consistently allows later observers to decide whether two reports describe the same event. The school has found that careful habits matter more than expensive equipment. This is a lesson that beginners quickly learn.
Question 17
PREDICT
Exam guide & reading text▾
From curiosity to usable evidence — Part 3: Word Formation
"From curiosity to usable evidence" focuses on Word Formation (Part 3), where a base word in capitals must be transformed to fit a gap in the text. Cambridge tests prefixation, suffixation, internal changes and negative forms. Before writing, identify the word class required (noun, adjective, adverb or verb) and whether the sentence needs a negative or comparative form. Spelling accuracy matters — an otherwise correct stem with a typo scores zero.
Night-sky observation is shaped by the (17) .......... nature of the weather and by the (18) .......... of the sky at any given time. Unless entries are (19) .......... dated and located, the data become far less (20) .......... to researchers.
For many participants, the main motivation is sheer (21) ........... Yet the value of a report often depends on the (22) .......... of what has been seen. Only then can records from different locations be (23) .........., and only then does their (24) .......... become clear. Volunteer observers also learn to distinguish a genuine astronomical event from an effect produced by aircraft, satellites or changes in the atmosphere, a habit that takes considerable time to develop.
The most useful entries include details that may seem minor at first: the direction of a light, the time at which it appeared and the conditions under which it disappeared. Recording such information consistently allows later observers to decide whether two reports describe the same event. The school has found that careful habits matter more than expensive equipment. This is a lesson that beginners quickly learn.