Mark the letter A, B, C or D on your answer sheet to indicate the word(s) SIMILAR in meaning to the underlined word(s) in each of the following questions.

Around 150 B.C. the Greek astronomer Hipparchus developed a system to classify stars according to brightness.

A. shine

B.record

C.categorize

D. diversify

Mark the letter A, B, C or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

Around 150 B.C. the Greek astronomer Hipparchus developed a system to classify stars according to brightness.

A. categorize

B. shine

C. record

D. diversify

Read the dialogue and then decide whether the statements that follow are true or false. Write True or False in your answersheet:

A planet is a body in space that revolves around a star. There are nine planets in our solar system, and these nine planets travel around the sun. The names of the planets are Mercury, Venus, Earth, Jupiter, Saturn, Uranus, Neptune, and Pluto. Planets travel in orbits around their stars . All of the planets of the solar system revolve in elliptical orbits. In other words, their orbits are like large, flat circles. The time that it takes a planet to make one revolution around the sun is called its year. The Greek were the first people to recognize and give names to some of the planets. The word planet comes from a Greek word meaning wanderer. If a person wanders, this means that he goes from one place to another and does not have a home. The Greek thought that the planets “wandered” in the sky. However, modern scientists can predict the movement of the planets very accurately

____ 1/ A planet revolves around the Earth.

____2/ Venus, Mars and Neptune are planets and stars.

____ 3/ The Greek were the first to recognize some of the planets.

____ 4/ The planets in our solar system travel around the sun and in elliptical orbits

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questions

Stellar Astronomy

Many parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.

There are different types of stars in the universe. For our purposes, we can classify them into two categories: variable and binary. Variable stars are those which show some degree of variability in their luminosity and magnitude. Luminosity refers to the amount of energy radiated by a star, while magnitude refers to its brightness. At time the degree of variability may be high, requiring a telescope with an equally high light- gathering power. This can be achieved by using a lens of large diameter, such as that of a reflecting telescope.

Binary stars are those found in pairs that revolve around a common center. The closest star to the sun, Proxima Centauri, is a binary star. To observe a binary star, the resolving power of a telescope - its ability to distinguish between two close objects having a small angular separation - must be very high.

Stellar astronomy is possible for a everyone, well beyond mere looking at the sky with the naked eye in order to identify constellations. With two basic of telescopes and rudimentary knowledge, much exploration can be achieved.

Complete the summary by choosing one sentence (A, B, C or D) that is among the most important information to fill in the blank.

A. Variable stars may differ in the amount of energy they radiate or in their luminosity.

B. Variable stars change in brightness and luminosity, and require a telescope with a large lens

C. Proxima Centauri, the closest star to Earth, is a binary star and requires a large telescope for observation

D. Many different types of stars exist, but the most important categories are variable and binary stars.

Read the followingpassage and mark the letter A, B, C or D onyour answer sheet to indicate the correct answer to each of the questions

Stellar Astronomy

Many parameters are used to describe a star. One of them is its temperature, which can be determined by simple observation; the color of a star and its temperature are related. Once the color of a star is identified, its temperature can be calculated through the use of scientific principles such as Wien’s Law.

There are different types of stars in the universe. For our purposes, we can classify them into two categories: variable and binary. Variable stars are those which show some degree of variability in their luminosity and magnitude. Luminosity refers to the amount of energy radiated by a star, while magnitude refers to its brightness. At time the degree of variability may be high, requiring a telescope with an equally high light- gathering power. This can be achieved by using a lens of large diameter, such as that of a reflecting telescope.

Binary stars are those found in pairs that revolve around a common center. The closest star to the sun, Proxima Centauri, is a binary star. To observe a binary star, the resolving power of a telescope - its ability to distinguish between two close objects having a small angular separation - must be very high.

Stellar astronomy is possible for a everyone, well beyond mere looking at the sky with the naked eye in order to identify constellations. With two basic of telescopes and rudimentary knowledge, much exploration can be achieved.

Which of the following is true of variable stars?

A. They vary in brightness

B. They rotate around each other.

C. They vary in color.

D. The size of the telescope must vary in order to observe them.

Mark the letter A, B, C, or D on your answer sheet to intricate the correct answer to each of the following questions.

We intend to _____ with the old system as soon as we have developed a better one.

A. do in       

B. do down 

C. do up       

D. do away