Answer:
some comet are very difficult to see because they are made of water and dust and they reflect light very well, so scientists only know about those that make regular appearances, and some comets have not been discovered yet and due to that scientist both sky watchers and strong telescope to report new comets and only them can identify them, although some comet can be seen easily by ordinary people
Explanation:
Although some comet are difficult to see, scientist uses sky watchers to help them to spot them, they also use strong telescope to identify them
I hope people are more careful and cautious when coming into contact with others.
all of the above..............
The answer is B. False. Source cards are index cards which are used to take note all the necessary information about the sources you have used. Source cards only contain the following contents: Author, Title of the Book, Place of Publication, Location of source and source number. Whereas, a library call number appears on a specific part of a book, e.g. spine of book, which are used as codes in order to easily locate the book in the library.
