Whether you were struggling last year or not, becoming an "A" student or maintaining an "A" average is a goal that every student should have. Grades are very important, but even more, so is understanding the concepts. Here are some ways to become an "A" student this school year. Organizational Skills Being organized is an essential skill to have if you want to be an "A" student. This means you have to become very familiar with to-do lists and planners. Have a folder with sections for each subjec t that you do so that you can easily and effectively file handouts, worksheets, notes and test papers. Studying : As it relates to studying, create a list with the topics or points that you wish to study based on the time that you have to study. However, be realistic with what you can achieve in each study session. There are also various study techniques that you can make use of! Homework : When it comes to homework, be sure to create a list of your h
The Solar System
The Solar System is otherwise called the Planetary System and contains the Sun, its eight planets and other heavenly bodies. The planets revolve around the Sun in an elliptical (oval) orbit (path). The planets in order of distance from the Sun are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
The Sun is a star, and the light of the Sun falls on each planet, which is in turn reflected by them. This is the only light that the planet reflects. All of the energy of the Solar System is derived from the Sun whose surface is about 6000oC.
Some of the planets, for example Earth, Jupiter and Saturn have satellites. A satellite is a small heavenly body that revolves around a large body. The Moon is the satellite that revolves around the Earth and it takes 27 to 28 days to do so.
The Earth is 150 million kilometers away from the Sun. Sunlight takes 8 minutes to get here. The Earth is a minor planet of the Solar System, and the Solar System is a minute portion of this bask galaxy known as the Milky Way. The Milky Way is composed of thousands of millions of stars amongst which the Sun is only of medium size.
The Universe contains millions of Galaxies. In outer space, distances are so great that they can only be measured in lightyears. A Lightyear is the distance light will travel in one year. Light travels at the speed of 299,000 km per second. 1 lightyear = 9 billion Earth years. Stars tend to form clusters known as galaxies, and galaxies form groups.
Due to the planets being at varying distances from the sun, each takes a different time to complete 1 orbit. Mercury takes 88 days to complete its orbit (88 days = 1 year there).
Earth completes its orbit in 365.25 days which is the length of 1 year on earth (365.25 days = 1 Earth year). Every 4 years, the Earth completes its orbit in 366 days. This is called a leap year. The following table shows the eight planets, their distances from the sun and how long they take to complete an orbit:
The Solar System:
Key Terms
Solar System - Otherwise called the Planetary System, the solar system is a body consisting of eight planets which orbit the sun and their satellites, stars and other heavenly bodies.
Planets - Any of the eight celestial bodies that revolve around the sun in a set path called an orbit.
Meteoroids - Pieces of rocks travelling through space.
Orbit - The path on which each planet revolves around the sun.
Galaxy - A system or collection of stars held together by gravitational attraction.
Gravity - The force that holds the planets in place and attracts or pulls bodies towards the centre of the earth.
Lightyear - The distance from the sun at which light travels in one year.
Asteroid - Objects made of rocks which orbit the sun in between the planets.
Satellites - Smaller objects that orbit or revolve around planets. They are also called moons.
Stars - Masses of hot gases which give off its own heat and light.
Constellations - Groups of stars that form a pattern often given a name.
Atmosphere - The mass of gases surrounding a planet.
Elliptical - Oval shaped.
You can try these SOLAR SYSTEM REVIEW QUESTIONS to see how well you have grasped the concept.
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