Stars and the Solar System Test

Result

Stars and the Solar System Test - 13

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Weekly Quiz Competition

Question 1
1 / -0

Which is the nearest planet to the Sun?

A
Venus

B
Jupiter

C
Mercury

D
Mars

Solution

Mercury is the closest planet to the Sun. The planet probably received this name because it moves so quickly across the space. Temperature variations on Mercury are the most extreme in the solar system ranging from 90 K to 700 K. Mercury is the second densest major body in the solar system, after Earth.
Question 2
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A meteor burns up on entering earth's atmosphere due to:

A
atmospheric pressure

B
heat of the earth

C
solar radiation

D
excessive friction

Solution

Due to very high speed of meteor through earth's atmosphere, the heat produced by the friction of air is very large to cause the meteor burn.
Thus, option D is correct.
Question 3
1 / -0

The distance between the sun and the earth is

A
150 million kilometers

B
100 million kilometers

C
2 billion kilometers

D
1.2 light years

Solution

$$\textbf{Hint: Time taken by sunlight to reach earth is 8 min and 20 seconds.}$$

$$\textbf{Correct option: Option (A).}$$

$$\textbf{Explanation:}$$

$$\textbf{Step 1:Time taken by sunlight to reach earth.}$$

Time taken by sunlight to reach earth, $$t=8\min ,20\sec $$

$$\Rightarrow t=8\times 60+20=480+20=500\operatorname{s}$$

$$\textbf{Step 2: Calculating the distance of sun from earth.}$$

We know that the velocity of light, $$c=3\times {{10}^{8}}m{{s}^{-1}}$$

The distance of sun from earth will be,

$$distance=velocity\times time$$

$$\Rightarrow d=c\times t=(3\times {{10}^{8}}m{{s}^{-1}})\times 500s=150\times {{10}^{9}}m=150\times {{10}^{6}}km$$

$$\textbf{Thus, distance of sun from earth is 150 million kilometers. Hence, option (A) is correct.}$$
Question 4
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Fill in the blank:

Meteors are also known as _________ stars.

A
twinkling

B
pole

C
shooting

D
binary

Solution

"Shooting stars" is another name for meteors because they appear as streaks of light across the night sky caused by small bits of interplanetary rock and debris burning in the Earth's upper atmosphere.
Question 5
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Which of the following planets can be seen with the naked eye?

A
Mercury, Venus, Mars and Jupiter

B
Mars, Jupiter, Uranus and Neptune

C
Mercury, Venus, Uranus and Neptune

D
Mercury, Mars, Jupiter and Neptune

Solution

The five brightest planets are Mercury, Venus, Mars, Jupiter, Saturn. Uranus and Neptune planets are not amongst the brightest stars.
Question 6
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Which of the following is largest in size among all?

A
Saturn

B
Jupiter

C
Neptune

D
Mercury

Solution

Jupiter is the largest planet of the solar system. It has radius of $$69,911 km$$. So, it is about $$1120$$% of the size of the Earth.
Question 7
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Light year is a unit of:

A
$$speed$$

B
$$speed \times time$$

C
$$\displaystyle \frac{speed}{time}$$

D
$$time$$

Solution

$$speed=\frac{distance}{time}$$
$$speed \times time=distance$$
$$Light\ year$$ is a unit to measure $$distance$$
Question 8
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The tail of a comet always points__________ .

A
towards the sun

B
away from the sun

C
towards north-east

D
towards south-west

Solution

The streams of dust and gas thus released from a huge extremely tenous atmosphere around the comet called coma and force exerted on coma by the sun's radiation pressure and solar wind cause an anormous tail form which points away from the sun
Question 9
1 / -0

The planet nearest to the Sun is

A
Mercury

B
Earth

C
Venus

D
Pluto

Solution

The planet nearest to the Sun is Mercury which can be seen in the picture.
Question 10
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Match items in column A with one or more items in column B
Column A Column B
(i) Inner planet (a) Saturn
(ii) Outer planet (b) Pole star
(iii) Constellation (c) Great Bear
(iv) Satellite of the earth (d) Moon
(e) Earth
(f) Orion
(g) Mars

A
$$( i) - g,e \ (ii) - a \ (iii) -c,f (iv) - d$$

B
$$( i) - g,e \ (ii) - c,f \ (iii) -a (iv) - d$$

C
$$( i) - a \ (ii) - b \ (iii) -c,f (iv) - d$$

D
None of these

Solution

Column A Column B
(i) Inner planet (g), (e) Mars, Earth
(ii) Outer planet (a) Saturn
(iii) Constellation (c), (f) Great bear, Orion
(iv) Satellite of the Earth (d) Moon

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Re-Attempt Weekly Quiz Competition

Column A	Column B
(i) Inner planet	(a) Saturn
(ii) Outer planet	(b) Pole star
(iii) Constellation	(c) Great Bear
(iv) Satellite of the earth	(d) Moon
	(e) Earth
	(f) Orion
	(g) Mars

Stars and the Solar System Test - 13

Result

Stars and the Solar System Test - 13

Score

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Rank

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SHARING IS CARING

Question 1

Venus

Jupiter

Mercury

Mars

Solution

Question 2

atmospheric pressure

heat of the earth

solar radiation

excessive friction

Solution

Question 3

150 million kilometers

100 million kilometers

2 billion kilometers

1.2 light years

Solution

Question 4

twinkling

pole

shooting

binary

Solution

Question 5

Mercury, Venus, Mars and Jupiter

Mars, Jupiter, Uranus and Neptune

Mercury, Venus, Uranus and Neptune

Mercury, Mars, Jupiter and Neptune

Solution

Question 6

Saturn

Jupiter

Neptune

Mercury

Solution

Question 7

$$speed$$

$$speed \times time$$

$$\displaystyle \frac{speed}{time}$$

$$time$$

Solution

Question 8

towards the sun

away from the sun

towards north-east

towards south-west

Solution

Question 9

Mercury

Earth

Venus

Pluto

Solution

Question 10

$$( i) - g,e \ (ii) - a \ (iii) -c,f (iv) - d$$

$$( i) - g,e \ (ii) - c,f \ (iii) -a (iv) - d$$

$$( i) - a \ (ii) - b \ (iii) -c,f (iv) - d$$

None of these

Solution

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