DAV Class 5 Science Solution Chapter 11 Our Solar System
DAV School Books Class 5 Science Solution Chapter 11 Our Solar System all Question Answer. DAV Class 5 11th Chapter Our Solar System full Chapter explanation by expert teacher.
A.) Fill in the blanks.
Answer: (1) blue (2) 24 (3) eight (4) heat, light (5) rotation.
B.) Match the following
1. Ringed planet | a. mercury |
2. The largest planet | b. Neptune |
3. A natural satellite | c. Jupiter |
4. The windy planet | d. Moon |
5. The smallest planet | E. Saturn |
Answer: (1) e, (2) c, (3) d, (4) b, (5) a.
C.) Tick the correct option.
1.) The number of planets, in our solar system, is-
Answer: eight
2.) The planet, which reflects large amount of sunlight falling on it, is-
Answer: Venus
3.) The planet Uranus is also known as a-
Answer: Jovian planet
4.) The correct statement, about the atmosphere of the planet named in it, is-
Answer: Venus has mostly carbon dioxide around it.
5.) The fourth and the sixth planets, of the solar system, are, respectively-
Answer: Mars and Saturn
6.) Consider the following statements about the Earth’s moon:
- The moon is Earth’s natural satellite.
- We can see full moon after every 15 days.
- The moon is a non-luminous object.
- The moon takes nearly 18 days to complete one revolution around the earth.
The statements, that are correct, are the statements-
Answer: A and C
7.) The first Indian satellite is-
Answer: Aryabhatta
D.) Answer the following questions in brief.
1.) Name the hottest planet in our solar system. Is it closest to the Sun?
Answer: Venus is the hottest planet. It is not closest to the sun.
2.) How much time does the earth take to-
(i) revolve once around the sun?
Answer: 365 days ( 1 year)
(ii) to complete one rotation about its own axis?
Answer: 24 hours ( 1 day)
3.) State the nature of the shape of orbit of planets.
Planets revolve around the sun in a circular path this is called the orbit.
4.) Write the meaning of the term ‘Artificial Satellites’.
Answer: artificial satellites are man made objects that revolve around a planet. These are used to record or collect informations.They are also used for weather forecasting and radio sensing.
E.) Answers the following questions.
1.) How is the sun useful to us?
Sun is a huge source of energy and gives it in the form of heat and light to other planets. the energy given by the sun is also known as solar energy and it is a renewable source of energy. the light is extremely important for different functions on life such as heating the earth and making it reach an average temperature for life to exist other than that satellite also helps life forms such as the plants in producing their food
2.) Name the terrestrial planets. Why are they so called?
Mercury, Venus and Mars as well as earth all of them have similar structures and they are composed of metals rocks and other organic substances hence these planets are known as terrestrial planets meaning earthlike planets
3.) State the conditions necessary for existence of life on a planet.
The conditions necessary for life to exist in a planet are
Existence of atmosphere.
Presence of water.
Not a very long distance from the sun so that it can get adequate heat to sustain life on the planet.
5.) State two uses to which artificial satellites are being put.
Artificial satellite are used for communication for transmitting radio signals as well as television telephone signals also
They are also used for the weather forecasting and remote sensing.