Back to: Basic Science Primary 6
WELCOME TO CLASS
The Sky
The sky is the space above the earth. It is the space we see when we look up from the earth. The sky above us is blue depending on the atmosphere; while the space is the boundless black sky that is beyond the blue sky.
NOTE: The sun gives light to the moon and earth.
NOTE: The scientists that study space and the objects that are there are called Astronomers.
Natural Bodies in the Sky
- Sun
- Star
- Moon
THE SUN
The sun is the star that shines in the sky during the day and gives earth heat and light. The earth or the world is the planet we live in. The earth travels round the sun once in a year. The earth rotates about its axis once in a day (24 hours).
THE STARS
The stars are enormous spheres of gases which gives out a great amount of energy.
NB.: The sun is a star. It is a ball of glowing gas about 150 million miles away from us.
THE MOON
The moon is the round object that moves round the earth once every 29 days and shines at night by light reflected from the sun. It does not shine on its own. When we have a full moon, it means sunlight is reflected from the full face of the moon. The diameter of the moon is 3200km and its distance from us is about 348300km.
NOTE: The moon is also called as the satellite of the earth.
THE NINE PLANETS
Astronomers discovered nine planets and gave their details in order of their average distance from the sun, starting with the closest as:
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto.
Astronomers also discovered that the largest planet is Jupiter while the smallest planet is Mercury.
NOTE: The closest planet to the sun is Mercury; while the third planet out of the sun is Earth.
THE SOLAR SYSTEM GRAVITY
The solar system consists of the Sun and the nine planets. Other components of the Solar systems includes the satellites, numerous comets, asteroids, and interplanetary medium.
The sun is the richest source of electromagnetic energy in the solar system. About 32 moons are there in the solar system revolving around some of the planet with many comets and asteroids.
The closest body to the earth is the moon.
The nearest star to the earth is the sun.
The planet closest to the sun is mercury.
The planet most far away from the sun is Pluto.
NATURAL BODIES IN THE EARTH
- Air
- Water
- Plants
- Animals
NATURAL BODIES UNDER THE EARTH
- Crude oil
- Coal
- Iron
- Gold, e.t.c.
GENERAL EVALUATION
- Identify components of the solar system
- Mention the nine planets
WEEKEND ASSIGNMENT
- Differentiate between the following:
- planet and satellite
- comets and asteroids
- Arrange the planets in their positions from the sun.
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