SEBA Class 7 Science Important Chapter 12 Earth Moon and The Sun

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SEBA Class 7 Science Important Chapter 12 Earth Moon and The Sun

Also, you can read the SCERT book online in these sections Solutions by Expert Teachers as per State Council of Educational Research and Training (SCERT) Book guidelines. SCERT Class 7 Science (Amar Bijnan) Extra Solutions in English are part of All Subject Solutions. Here we have given SCERT Class 7 Science Additional Notes in English for All Chapters, You can practice these here.

Earth Moon and The Sun

Chapter: 12

PART – II

IMPORTANT QUESTION ANSWER

Short Type Questions and Answers:

1. How long does the Earth take to complete one full rotation on its axis? 

Ans: The Earth completes one full rotation in about 24 hours.

2. In which direction does the Earth rotate? 

Ans: The Earth rotates from west to east.

3. What is the movement of an object around another object called?

Ans: This movement is known as revolution.

4. At what angle is the Earth’s axis of rotation tilted? 

Ans: The axis is tilted at an angle of 23.5°.

5. How many days does it take for the Earth to revolve once around the Sun? 

Ans: It takes 365 ¼ days for the Earth to complete one revolution.

6. Why does the Pole Star (Dhruva Tara) appear stationary in the sky? 

Ans: It appears stationary because it is located almost directly above the North Pole, aligned with the Earth’s axis of rotation.

7. What celestial event occurs when the Moon blocks the Sun’s rays from reaching the Earth? 

Ans: This phenomenon is called a solar eclipse.

8. What is the name of the path followed by the Earth as it moves around the Sun? 

Ans: The path followed by the Earth is called its orbit.

9. What is a “Blood Moon”? 

Ans: During a total lunar eclipse, sunlight passing through Earth’s atmosphere causes the Moon to appear dark red, a phenomenon known as the ‘Blood Moon’.

10. Who is known as the “Father of the Indian Space Programme”? 

Ans: Dr. Vikram Sarabhai is known as the Father of the Indian Space Programme.

Fill in the Blanks:

1. The Earth’s axis of rotation passes through the ___________ and the ______________.

Ans: North Pole, South Pole.

2. The imaginary line on which the Earth rotates is called the ____________.

Ans: Axis.

3. The _______________ divides the Earth into the Northern Hemisphere and the Southern Hemisphere.

Ans: Equator.

4. Ancient Indian astronomy, which includes the study of celestial motions, was known as _____________.

Ans: “Jyotisha”.

5. A stunning visual effect called the ___________ is seen just before or after a total solar eclipse.

Ans: “Diamond Ring”.

True or False:

1. The orbit of the Earth is a perfect circle. 

Ans: False – it is nearly circular but not a perfect circle.

2. A lunar eclipse can take place only during a full Moon phase.

Ans: True.

3. Seasons are caused because the Earth is closer to the Sun in the summer. 

Ans: False – they are caused by the tilt of the Earth’s axis.

4. The Sun actually moves from east to west while the Earth remains still. 

Ans: False – the Sun only appears to move due to Earth’s rotation.

5. The equator receives direct and intense sunlight throughout the year.

Ans: True.