Page 94 - Active Science 5 Ebook and Activity

Glossary

• Solar system : A system in which the sun and the other eight planets revolve
around the sun.

• Sun : It is a giant star and a huge ball of burning gases that provides
energy for life on the earth.
• Moon : It is the only natural satellite of the earth.
• Phases of the moon : These are the apparent changing shapes of the moon during a
month.
• New moon : A phase when we cannot see the moon at all (from earth).
• Tides : Periodic rise and fall of the ocean waters due to gravitation pull
of the moon.
• Spring tides : The higher tides during full moon and new moon.
• Neap tides : The low tides during quarter moons.

Practice Time

A. Choose the correct option.

1. The natural satellite of the earth is the ______________.
a. star b. sun

c. planet d. moon
2. Which of the following is not present on the moon?

a. Heat b. Atmosphere
b. Craters d. None of these

3. The gravity on the moon as compared to that on the earth is ______________.
a. one-fourth b. one-fifth
c. one-sixth d. one-eight

4. In a solar eclipse, the correct order of the three heavenly bodies will be ______________.
a. sun, earth, moon b. sun, moon, earth

c. moon, sun, earth d. none of these
5. Eclipse occurs when ______________.
a. the sun is between the moon and the earth

b. the sun, the earth and the moon are in a straight line
c. the sun, the earth and the moon are not in a straight line

d. the sun and the earth are in a straight line
6. Neap tides occur on a ______________ day.

a. new moon b. full moon
c. no moon d. quarter moon

94 Active Science-5