4th PT science5

1. 1. Which of the following is the color of a young star?

• A. red star

• B. yellow star  

• C. bluish- white star  

• D. pink

1. 2. Stars are the building blocks of galaxies, of which there are billions in the universe Which statement is true about stars?

• A. Big Dipper and little Dipper are examples of constellations.

• B. Constellations help navigators whenever they are lost in the sea. 

• C.  Orion consists of five stars that seem to form letter W.

• D. Stars do not move.

1. 3. Stars are so far away that distances between them are measured in light-years.

         How can the position of stars be used to determine the time of year?

• 1. A. By counting the number of shooting stars visible in a given period

• B. By measuring the angle of star clusters relative to the horizon.

• C. By noting the appearance of specific stars at certain times of the year

• D. By observing the movement of constellations

1. 4. Stars are huge celestial bodies made of gases and can produce light and heat through nuclear fusion inside their cores. Why do some stars appear to twinkle in the night sky?

• 1. A. Due to atmospheric turbulence causing light to scatter

• B. Due to changes in their brightness

• C. Due to their proximity to other celestial objects

• D. Due to their rapid rotation

1. 5. Polaris, is also known as the North Star. Why is Polaris helpful in finding directions?

• 1. A. It can be seen both day and night.

• B. It is fixed star which always points at the north.

• C. It is the biggest star in the universe.

• D. It is the most visible star in the night sky.

1. 6. Why does the moon have different phases?

• 1. A. It follows the sun.     

• B. It moves around the earth   

• C. It moves around the sun   

• D. Its surface experience seasons

1. 7. Which shows the correct sequence of the moon phases?

• 1. A. gibbous moon-crescent moon-new moon-full moon, half moon

• B. new moon-crescent moon-half moon-quarter moon-full moon

•   C. new moon-full moon-half moon, gibbous moon-crescent moon

• D. new moon-gibbous moon-full moon-crescent moon, half moon

1. 8. How is the moon revolve around the earth?

• 1. A. As the moon revolves, it also rotates once on its axis as it makes one

     revolution around the Earth.

• B. As the moon revolves around the earth, it also moves on its axis 24 hours.

•   C. As the moon revolves around the Earth, it keeps on rotating on its axis.

• D. The moon revolves around the Earth 29 ½ days.

1. 9. Why does the moon seem to have different shapes?

• 1. A. because the moon is smaller than the Earth

• B. because the moon has lesser gravity than the Earth

• C. because the moon takes 29 ½ days to rotate on its axis and revolves

       around the Earth

• D. because the observer of the moon sees the lighted side of the moon

1. 10. A moon is a massive, heavy rock ball that orbits a planet. The moon, as it orbits around the Earth appears to change shape because_____________________.

• 1. A. It changes the position in relation to the sun and Earth.

• B. It is not always the same distance from Earth

• C. It moves further from the Earth

• D. It moves nearer the Earth