Olympiad Test Level 2: Earth and Universe- 2 - Class 4 MCQ

Jupiter is the largest planet. Venus is the brightest planet because sunlight is reflected by its clouds and it is near to Earth which makes it brightest planet. Earth is the densest planet. Mercury is the smallest planet.

The weight on Mars is two- thirds less than the weight on Earth.

GPS is used to track the location. GPS means Global Positioning System.

The Earth is in the galaxy known as Milky Way galaxy.

Comets revolve around the sun in oval shape orbit.

It takes moonlight around 1.3 seconds to reach the earth. If we are to become more precise then it takes 1.26 seconds to reach earth. Bluish is the colour that moonlight has or it is how it appears to our eyes. It is also described as ‘silvery’ even though there is no inherent silver quality in moonlight. The albedo of the moon is 0.136 and this means that only 13.6 percent of the incident sunlight is reflected from the surface of the moon.

In the earth’s atmosphere the moonlight scatters and this leads to the brightness of the night sky increasing. Apart from this one more result of moonlight is that it reduces the contrast between dimmer stars and the background. This is the reason why many astronomers avoid having observing sessions during the time of a full moon.

There are a lot of superstitions which are attached to moonlight like - blindness, swelling, distortion, etc. Meat which is exposed to moonlight in tropical climates is believed to become rapidly putrid.

Therefore the correct answer is option D.

However, note that Jupiter is listed in the options, but it is not an inner planet. The inner planets (also called terrestrial planets) include Mercury, Venus, Earth, and Mars, with Earth being the largest among them. Jupiter is a gas giant and belongs to the outer planets.

The planets with maximum numbers of satellite that is 82 is Saturn.

Moon does not produce its own light. Moonlight is because of Sun’s light that shines on it and bounces off. 

Mercury takes 88 days to complete one revolution around Sun.