Science Review Activity, for fourth graders, this activity is about the solar system. This is a review activity for the bimonthly science assessment.
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SCHOOL: DATE:
PROF: CLASS:
NAME:
Within the universe is our galaxy, the Milky Way, and within this is the solar system. The solar system is the set of planets that include the earth, all these planets orbit the sun.
the solar system is composed of:
There are two types of celestial bodies: those that have their own light, like the stars, and those that do not have their own light, like the planets.
Outside the solar system we have many stars and the closest is the sun.
The Sun is the center of our solar system, and all planets revolve around it. This movement that the planets make around the Sun is called an orbit.
To observe space, man created several inventions such as: telescopes, telescopes, planetariums, spacecraft, probes, artificial satellites and space travel.
The planet earth doesn't stay still, it has two main movements, the rotation and the translation. The movement of the earth around itself is called rotation (the rotation takes 24 hours) and the movement of the earth around the sun is called translation (translation takes 365 days or 1 year).
The earth is not always upright, it has an inclination that changes throughout the year, this movement is called seasonal slope. This difference in inclination dictates the seasons of the year, this change between seasons does not occur smoothly. Living beings adapt to these seasonal (climatic) variations.
Men are basically diurnal beings (they work better in the morning), but when necessary they can adapt to the afternoon mode (they work better in the afternoon or evening). Man is one of the few animals that can adapt, animals are usually or are morning, afternoon or night. These rhythms of habits in relation to day and night are called circadian rhythms.
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