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Artificial satellites

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Presentation on theme: "Artificial satellites"— Presentation transcript:

1 Artificial satellites
Developing: Know what an artificial satellite is Secure: Describe the different types of artificial satellites Exceeding: Understand what keeps artificial satellites in orbit Entrance Activity Name the phases of the moon Tool box – Key words Artificial satellite Geostationary Polar Hubble Space telescope

2 A satellite is any object that orbits another object.
Teacher explanation A satellite is any object that orbits another object. The Moon is a natural satellite of the Earth and is kept in orbit by the attraction of the Earth’s gravity and by its motion. An artificial satellite is an object made by, and put into orbit by, humans.

3 Artificial satellites
Developing: Know what an artificial satellite is Secure: Describe the different types of artificial satellites Exceeding: Understand what keeps artificial satellites in orbit Entrance Activity Name the phases of the moon Tool box – Key words Artificial satellite Geostationary Polar Hubble Space telescope

4 What do you think we use artificial satellites for?
Learning activity What do you think we use artificial satellites for? Discuss in groups.

5 Teacher explanation

6 Assessment Activity

7 Artificial satellites
Developing: Know what an artificial satellite is Secure: Describe the different types of artificial satellites Exceeding: Understand what keeps artificial satellites in orbit Entrance Activity Name the phases of the moon Tool box – Key words Artificial satellite Geostationary Polar Hubble Space telescope

8 Teacher explanation

9 Imagine the mountain in Newton’s thought experiment was lower.
Teacher explanation Imagine the mountain in Newton’s thought experiment was lower. If the same amount of gunpowder was used, would a ball shot from the lower mountain travel the same distance as from the high mountain? No. More gunpowder would be needed to make the ball travel the same distance. Therefore, more gunpowder would be needed to make the ball go into orbit. This means that if a satellite orbits the Earth at a lower altitude, it needs to travel faster to stay in orbit.

10 Student Reading Activity
The Hubble Space Telescope (HST) is a satellite in orbit around the Earth. It was deployed from the Space Shuttle Discovery on 24 April 1990. The HST is outside the Earth’s atmosphere and does not experience the same interference as Earth-based telescopes. This means that its images of the Universe are much more detailed than images observed from Earth. Photo credit: NASA Headquarters - Greatest Images of NASA (NASA-HQ-GRIN) Image shows a portion of the Eagle Nebula, taken on 1 April 1995 with the Hubble Space Telescope. The column is composed of hydrogen gas and dust. The finger-like projections at the top of the column are larger than our Solar System in size, and contain newly formed stars.

11 Learning Activity Photo credit: © 2007 Jupiterimages Corporation

12 Artificial satellites
Developing: Know what an artificial satellite is Secure: Describe the different types of artificial satellites Exceeding: Understand what keeps artificial satellites in orbit Entrance Activity Name the phases of the moon Tool box – Key words Artificial satellite Geostationary Polar Hubble Space telescope

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