Download App

Stars and the Solar System — Science STD 8 — Question

Gujarat BoardEnglish MediumSTD 8ScienceStars and the Solar System3 Marks
Question
What are planets? How many planets are there in the Solar System?
✓

Answer

Planets are the members of the Solar System. They look like stars but they do not have light of their own. They reflect the sunlight that fall on them. They keep changing their positions with respect to the stars. A planet revolves around the Sun in a definite path. This path is called an orbit. The time taken by a planet to complete one revolution is called its period of revolution. As the distance of the planet increases from the Sun, the period of revolution increases. A planet also rotates on its axis besides revolving around the Sun. The time taken by the planet to complete one rotation is called its period of rotation. Some planets have moons or satellites revolving around them.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "questions in short. [3 marks ]" from Stars and the Solar System→Stars and the Solar System — all question types→Science STD 8 question papers→Gujarat Board STD 8 question papers→Gujarat Board question paper generator→

Similar questions

State the difference between Wildlife Sanctuary and Zoo.
→
Why are antibiotics not effective against 'common cold' and 'flu'?
→
A ray of light strikes a plane mirror $XY$ at an angle of incidence of $65^\circ $, is reflected from this plane mirror and then strikes a second plane mirror $YZ$ placed at right angles to the first mirror. What is the angle of reflection for the mirror $YZ?$
→
In which of the following cases are all the examples correctly matched? Give reasons in support of your answers.
(i) Elements – water, nitrogen, iron, air.
(ii) Uniform mixtures – minerals, seawater, bronze, air.
(iii) Pure substances – carbon dioxide, iron, oxygen, sugar.
(iv) Non-uniform mixtures – air, sand, brass, muddy water.
→
Name the scale on which the magnitude (or intensity) of an earthquake is expressed.
→
What is an organ system?
$a.$ Give two examples of organ systems in animals.
$b.$ Name the two main organ systems in plants.
→
Clasify the following crops into Khariff and Rabi crops and write in the tabular column given below: Maize, paddy, mustard, pea, gram, wheat, groundnut, cotton.
Khariff
Rabi
-
-
-
-
-
-
→
Name the micro-organism used in bread-making which makes the bread-dough rise. How does it make the dough rise?
→
Cells consist of many organelles, yet we do not call any of these organelles as structural and functional unit of living organisms. Explain.
→
What will happen to ‘pooris’ and ‘unused kneaded flour’ if they are left in the open for a day or two?
→