A satellite is any object that orbits another. Of those that orbit the earth, weather satellites are among the most common. However, other types of satellites also pass overhead each day. They are used for such things as communications and search-and-rescue data. The Hubble Space Telescope is a satellite, as is the International Space Station.
Some satellites have traveled far into space where they then go into orbit around a distant object, such as a planet. Over time they send back important information that increases our knowledge about the universe. Although many satellites in use today belong to the United States, a number have also been launched by other countries, such as Japan and Australia.
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For this WebQuest, your job is to investigate how satellites work and ways in which they are used. To demonstrate what you have learned, you will answer the questions included here. You will also complete one of the activities described at the end of this WebQuest.
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Read through the following questions. Then research the Internet resources that are provided for you. As you explore the sites, look for answers to the questions. Keep a record of any sites where you find answers by noting the title and URL (Internet address). For example:
(title) Technology Student Association
(URL) www.tsaweb.org
- Of what value is it to have weather satellites making observations of erupting volcanoes?
- All satellites have a thermal blanket to protect them from heat and cold. What is this blanket made from?
- What is the speed required to launch a satellite into orbit?
- About how many lives are saved each day by search-and-rescue operations based on satellite information?
- Why are geostationary orbits desirable for some satellites?
- Using POES satellites, about how long does it take to obtain photos of every square inch of Earth?
- Some satellites observe “weather” in space, such as the solar wind and sunspots. What are sunspots?
- About how many of the 8,000 objects orbiting the earth are designed as satellites and are not just “junk”?
- Suppose that two satellites are about to be launched. Although one will go into polar orbit and one into orbit around the equator, their altitude will be the same. Which will require the most fuel to reach orbit?
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Visit the Web sites listed here to find information that will enable you to answer the questions. Be sure to keep a record of any sites you use.
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Several activities are described below. Complete one of these activities (your choice) to demonstrate the understandings you’ve gained by going on this WebQuest.
- Register with a satellite tracker site and select a particular satellite to track. Record its vital statistics and chart the data you receive for 10 days.
- With your instructor’s help, use a laser and mirrors to demonstrate how a signal is reflected from Earth to a satellite and back to Earth again.
- Build a model or create a poster featuring a particular satellite design. Include its title, purpose, and any other important information.
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