# Formative Practice 9.1 – Form 5 Science (KSSM) Chapter 9

Question 1:
State five types of satellite orbits.

Answer:
• Low Earth Orbit (LEO)
• Medium Earth Orbit (MEO)
• High Earth Orbit (HEO)
• Geostationary Orbit (GEO)
• Geosynchronous Orbit (GSO)

Question 2:
(a) Draw a diagram to show the apogee and perigee of a satellite in an elliptical orbit.
(b) Explain the apogee and perigee of a satellite in an elliptical orbit.

Answer:
(a)

(b)
The apogee of a satellite in an elliptical orbit is the position of the satellite which is furthest from the planets or stars encircled by the satellite. The perigee of a satellite in an elliptical orbit is the position of the satellite which is closest to the planets or stars encircled by the satellite.

Question 3:
What is the relationship between orbital height and satellite velocity?

Answer:
The higher the orbital height of a satellite, the lower the satellite velocity.

Question 4:
What is Hohmann transfer orbit?

Answer:
Hohmann transfer orbit is an elliptical-shaped orbit used to transfer launch vehicles between two orbits of different heights.

Question 5:
Why are astronauts at the ISS in a floating condition?

Answer:
Due to zero-gravity condition at the ISS.

Question 6:
Give your views on the impact of increase in space junk.

Answer:
Increased risk of damage to satellites as a result of collision with the space junk.