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CBSE Sample Paper Class 8 Science Stars and the Solar System
1.) Answer the short questions (24×1)
a.) What are the celestial objects?
b.) What is astronomy?
c.) What is phases of moon?
d.) Name a festival in India which is celebrated according the phases of moon.
e.) How we can see moon at night?
f.) Who accompanies Earth while revolving around the Sun?
g.) Who first set foot on the moon?
h.) Which celestial object emit their own light?
i.) How far is the Sun from our planet?
j.) Which is the nearest star after the Sun?
k.) In space large distances are expressed in which unit?
l.) What is the speed of light?
m.) Why can’t we see stars during day time?
n.) What is constellation?
o.) Which planet is no longer considered as a planet?
p.) What is orbit?
q.) Which is the nearest planet of Sun?
r.) In solar system which planet is known haveexistence of life?
s.) What is the significance of Magalyaan?
t.) Which is the largest planet in our solar system?
u.) Which planets have rings around them?
v.) What are asteroids?
w.) What are meteors?
x.) Name some artificial satellites builtinIndia.
2.) Briefly answer the following questions (2×3)
a.) Describe moon.
b.) Name some famous constellations.
3.) Fill in the blanks (10×1)
a.) _______ revolves around Earth.
b.) Ursa major is also known as _______ .
c.) Approximately ______ Earths can be placed inside Jupiter.
d.) The outermost planets of our solar system is ______ and ______ .
e.) Meteors are also known as _________ .
f.) Mangalyaan was launched on ________ November, 2013.
g.) _______ planet is known as morning or evening star.
h.) Indian astronomer ________ stated Earth is sphere and rotates on its own axis.
i.) Star ________ is the brightest star in the sky.
j.) Cassiopeia can be seen in the _______ sky.
4.) Write true or false (10×1)
a.) Earth has many natural satellites.
b.) Mercury is the nearest planet of Sun.
c.) Uranus is no longer considered as a planet.
d.) Moon emits it’s own light.
e.) Ursa major movers around the pole star.
f.) We can hear sound in moon.
g.) Speed of light is 30km/second.
h.) Venus is the brightest planet in the night sky.
i.) Mars is called red planet.
j.) Artificial satellites rotates Earth but much closer than moon.
Answers
1.) Answer the short questions (24×1)
a.) What are the celestial objects?
Answer –In the sky there are different objects such as the stars, the planets, the moon and other objects. These objects are called celestial objects.
b.) What is astronomy?
Answer –Astronomy is the study of celestial objects and phenomena associated with them.
c.) What is phases of moon?
Answer – We can see moon changes its shape. This changing of shape of the bright side of the moon is called phases of moon.
d.) Name a festival in India which is celebrated according the phases of moon.
Answer – Diwali is the festival which is celebrated according the phases of moon.
e.) How we can see the moon at night?
Answer – Moon doesn’t have its own light. The sunlight reflects from the moon thus we can see the moon at night.
f.) Who accompanies Earth while revolving around the Sun?
Answer –Earth is accompanied by the moon while revolving around the Sun. The moon also revolves around the earth.
g.) Who first set foot on the moon?
Answer – Neil Armstrong first set foot on the moon.
h.) Which celestial object emit their own light?
Answer – The stars emit their own light.
i.) How far is the Sun from our planet?
Answer –Sun is nearly 150 million Kilometres far from our planet.
j.) Which is the nearest star after the Sun?
Answer – Proxima Centauri is the nearest star after the Sun.
k.) In space large distances are expressed in which unit?
Answer –In space large distances are expressed in the unit called light years.
l.) What is the speed of light?
Answer – The speed of light is 300,000 kilometres per second.
m.) Why can’t we see stars during day time?
Answer –we cannot see the stars during day time because of the presence of bright sunlight.
n.) What is constellation?
Answer –Constellation is the group of stars forming a recognisable shape in the night sky.
o.) Which planet is no longer considered as a planet?
Answer – According to new definition of planets, Pluto is no longer considered as a planet.
p.) What is orbit?
Answer –Orbit is a path by which planets revolves around the Sun.
q.) Which is the nearest planet of Sun?
Answer –Mercury is the nearest planet of Sun.
r.) In solar system which planet is known have existence of life?
Answer – In solar system planet Earth is the only known planet in which life exists.
s.) What is the significance of Magalyaan?
Answer – Mangalyaan is a Mars oribiter mission launched by India. With this India became the first country in the world to successfully do it in first attempt.
t.) Which is the largest planet in our solar system?
Answer – The largest planet in our solar system in our solar system is Jupiter.
u.) Which planets have rings around them?
Answer – Jupiter and Saturn have rings around them.
v.) What are asteroids?
Answer –Between Jupiter and Sun a large amount of objects revolve around the Sun. This objects are called asteroids.
w.) What are meteors?
Answer – Meteors are small object which occasionally enters the Earth’s atmosphere and the friction of the atmosphere causes them to glow and evaporates quickly.
x.) Name some artificial satellites built in India.
Answer – Some artificial satellites built in India are, Aryabhata, INSAT, IRS, Kalpana- 1, EDUSAT etc.
2.) Briefly answer the following questions (2×3)
a.) Describe moon.
Answer – Moon is a natural satellite of Earth. It revolves around Earth. It doesn’t have its own light. The surface of the moon is dusty and barren. It has lots of crates of different shapes and sizes. It also has steep and high mountains. Some mountains are even high as the highest mountains of Earth.
b.) Name some famous constellations.
Answer – Some famous constellations are,
- Ursa major
- Great bear
- Orion
- Cassiopeia
- Leo major
3.) Fill in the blanks (10×1)
a.) Moon revolves around Earth.
b.) Ursa major is also known as Saptarshi .
c.) Approximately 1300 Earths can be placed inside Jupiter.
d.) The outermost planets of our solar system are Uranus and Neptune .
e.) Meteors are also known as shooting stars .
f.) Mangalyaan was launched on 5th November, 2013.
g.) Venus planet is known as morning or evening star.
h.) Indian astronomer Aryabhatta stated Earth is sphere and rotates on its own axis.
i.) Star Sirius is the brightest star in the sky.
j.) Cassiopeia can be seen in the northern sky.
4.) Write true or false (10×1)
a.) Earth has many natural satellites.
Answer – False
b.) Mercury is the nearest planet of Sun.
Answer – True
c.) Uranus is no longer considered as a planet.
Answer – False
d.) Moon emits it’s own light.
Answer – False
e.) Ursa major movers around the pole star.
Answer –True
f.) We can hear sound in moon.
Answer – False
g.) Speed of light is 30km/second.
Answer – False
h.) Venus is the brightest planet in the night sky.
Answer – True
i.) Mars is called red planet.
Answer – True
j.) Artificial satellites rotates Earth but much closer than moon.
Answer – True