Summative Practice (Question 3 & 4) – Form 5 Science (KSSM) Chapter 9


Question 3:
Figure 2 shows different types of satellite orbits labelled A, B, C and D.

(a) Label the types of orbits in Figure 2 with the following abbreviations.

  GEO   HEO   LEO   MEO

(b) Based on Figure 2, name the type of orbit for GPS satellites.

Answer:
(a)
A: HEO
B: MEO
C: LEO
D: GEO

(b) MEO


Question 4:
The clock in a GPS satellite needs to be adjusted from time to time.
What is the importance of accurate time information from GPS satellites in our daily activities?

Answer:
Accurate and synchronised time information from the GPS satellite is used in the following daily activities:

In the field of transport
Safety of flights and landing of aeroplanes as well as ship and train routes depend on accurate and synchronised time.

In the field of telecommunications
Connections between handphones, live TV broadcasts and video conferences can be carried out continuously in accurately synchronised time

In the field of science
Accurate time and location of natural phenomena such as volcano eruptions, earthquakes and tsunami can be recorded.

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