Page 95 - Active Science 5 Ebook and Activity

7. Major constituents of the sun are ______________.

a. hydrogen and oxygen
b. hydrogen and helium

c. helium and oxygen
d. neon and oxygen

B. State whether the following statements are true or false.

1. The universe is a wide open space. _____
2. There is evidence of water at the poles of the moon. _____

3. We can live on the moon because it has an atmosphere. _____
4. Lunar eclipse will occur if the moon comes in between the sun and the moon. _____

5. A solar eclipse takes place only on a New Moon day. _____
6. Total solar eclipse is visible from all parts of the earth. _____

C. Fill in the blanks.

1. The gravitational forces of the sun and the moon ______________ each other to produce
spring tides.
2. The innermost layer of the earth is called ______________.
3. The major portion of the sun’s core is made up of ______________.

4. Lunar eclipse occurs only on ______________ day.
5. ______________ eclipse should not be seen with naked eye.

D. Give one word for each of the following.

1. Number of planets revolving around the sun _______________
2. The paths on which planets revolve around the sun _______________

3. The smallest planet _______________
4. The ‘blue planet’ _______________
5. The planet farthest from the sun _______________

6. The air that envelopes the earth _______________
7. India’s first unmanned mission to the moon _______________

E. Short Answer Questions.

1. What is an eclipse?
2. Lunar eclipse does not occur on every full moon day. Why?

3. Why is it dangerous to look at the sun during a solar eclipse?
4. When did man first land on the moon?

5. What is an artificial satellite?

F. Long Answer Questions.
1. How does an eclipse occur?

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