CHARACTERISTICS OF STARS

1.  What is the chemical composition of most star?

• A. hydrogen and helium

• b. hydrogen and oxygen

• C.  helium and oxygen

• D.  helium and carbon

2. Which characteristics of stars reveals its surface temperature?

• a. size

• b. color

• c. brightness

• d. mass

3. Which of the following is the correct order of the star from coolest to hottest?

• A.  blue, orange, yellow, white, red

• B. red, orange, yellow, white, blue

• C. blue, white, yellow, orange, red

• D. red, yellow, blue, orange, blue

4. There are approximately 400 billion stars in our galaxy alone, but how many stars can we seen at night sky?

• A. average of 2000 stars

• B. exactly 2000 stars

•   C. average of 3000 stars

• D. exactly 3000 stars

5.   Luminosity is the rate at which a star radiates energy into space. It is also referred as its brightness of the star, which of the following are the factors that determines the brightness of stars?

• A. color and mass

• B. distance and mass

• C. age and distance

• D. composition and age

Tags

NGSS.MS-PS2-4

6. Brightness of star can be measured through its apparent and absolute magnitude. How does apparent brightness differ from absolute brightness of a star?

   

• A. Apparent brightness is the perceived brightness of the star from the Earth while absolute brightness is the true brightness of the star if all stars were the same distance from earth.

• B.  Apparent brightness is the true brightness of the star if all stars were the same distance from earth while absolute brightness is the perceived brightness of the star from the Earth.

• C. Apparent brightness depends on the color and mass of the stars while absolute brightness depends on its surface temperature.

• D. Apparent brightness depends on the surface temperature of the stars while absolute brightness depends on its mass

7. All of the following are characteristics of stars EXCEPT:

   

• A. color

• B. surface temperature

• C. shape

• D. size

8. Why do stars appear to move in the sky? 

    

• A. The Earth is rotating on its axis.

• B. The Universe is expanding.

• C. The night sky is rotating.

• D. New galaxies are formed. 

9. Study and analyze the picture below.

Two stars where visible at night sky from the earth, Star A and Star B as seen in the picture. Which among the 2 stars will be look brighter when we see It at night sky?

•  A. Star A because it is much smaller than Star B.

• B. Star A because based on its size, its absolute brightness will be lesser than Star B.

• C. Star A can be brighter than Star B based on its size, but if we see it from the earth Star B will be brighter because it is closer to the earth.

• D. Star B because it much farther from the earth that is why it will look brighter even it is smaller than Star A.

10. 10. Study the picture below.

Which of the following BEST describe the picture above?

• A. A star which is small is less massive and has faster fusion.

• B. A star which is small has more pressure and temperature.

• C. Life span of the star depends on its mass, pressure and temperature. Stars with less mass, pressure and temperatures will have a longer life, so small stars have a longer life than bigger stars.

• D. All stars big or small has same life span. It depends on many factors like mass, pressure, temperature and fusion.

Tags

NGSS.HS-ESS1-3