The Inner Planets
Earth is just one of the planets in our solar system. Planets are large bodies that rotate around the sun. They reflect its light and warmth. The planets that are located closest to the sun are made out of rocky material. They are relatively small and heavy. In contrast, the planets that are farther away from the sun are much larger. They are formed of light gases. All planets follow a certain path around the sun. They are held a specific distance from the sun by the sun’s strong gravitational force.
The inner planets, or those closest to the sun, are Mercury, Venus, Earth and Mars. Even though these planets are all small and rocky, they have more differences than they have things in common.
Because Mercury is the closest to the sun, the side that faces the sun gets as hot as 427O Celsius. At the same time, the side that faces away from the sun is a freezing -173O Celsius. Mercury also has a slower rate of rotation than Earth. Days and nights on Mercury are much longer than ours. The extreme temperatures alone make it a very unlikely place for life. With an atmosphere too thin for human breathing, it’s obvious that people won’t be living on Mercury any time soon.
The next planet from the sun is Venus. Below clouds of sulfuric gas lies its 96% carbon dioxide atmosphere. That might be nice for a plant, since a plant “breathes” carbon dioxide, but not for a person. If you managed to survive the atmosphere, the surface of the planet is hot enough to melt solid metal. In addition, the pressure of the air would be strong enough to crush you.
You are probably most familiar with Earth because it is your home planet. It has the perfect conditions for life. Earth’s atmosphere and oceans help control the trickiest part of making a planet life-friendly: temperature. Earth is the only planet known to have liquid water.
Mars is the fourth farthest from the sun. Mars has been studied and photographed more than any other planet besides Earth. Some people think it may be possible for life to exist there. Although scientists have not been able to find actual water on Mars, there seems to be evidence of water erosion on its surface. Its canyons and mountains are very similar to those found on Earth. The main difference is that there is no plant life. Some scientists believe that Mars may have been very much like Earth until something happened that made the water supply evaporate.
Answer the following questions based on the reading passage. Don’t forget to go back to the passage whenever necessary to find or confirm your answers.
1) What keeps planets rotating a specific distance from the sun?
Planets are large bodies that rotate around in space to capture the sun’s warmth and the moons coolness.
2) Earth is the only known planet to have what important feature?
A controlled atmosphere that is suitable for human, plant, and animal life, and as well as liquid water.
3) Why is the atmosphere of Venus more friendly to plants than humans?
The atmosphere in Venuz is more friendly to plants rather than humans because it is filled with carbon dioxide, which we can not breathe in but what we breathe out.
4) Why is there such a the huge difference in temperature between the two sides of the planet Mercury?
The difference is that the side that is facing the sun is piping hot and has enough heat to probably extinguish any life force that walks on its surface while on the other side facing away from the sun is as cold or even colder than Antarctica in the Winter season.
5) Do you think that people will ever be able to colonize other planets in the future? Why or why not?
“Yes and No, why? because the neighbouring planets in our solar system are well some are unstable and others are. Although I don’t think I would be stupid enough to take the risk in settling into another planet that could or could not provide the requirements that we humans need. So when I am saying this I believe that I am speaking for the other civil people in the world that would agree with me and what I have just said.”
This is a reflection on ' Inner Planets ' I hope you find this information interesting because to me it sounds pretty frighting!