Data about the size and density of some other objects in our solar system is given in the table below.
Object
Mercury Earth
Earth’s Moon Mars
Jupiter The Sun
Diameter (km) 4880
12700 3470 6780
140000 139000000
Density (g/cm3 5.43 5.51 3.34 3.93 1.33 1.41
)
The densities of four materials commonly found in planets and moons are given in the table below.
Material Water
Granite Basalt Iron
Density (g/cm3 1.0 2.8 3.0 8.0
)
a. Granite and basalt are found in the Earth’s crust. Use the data given in the tables to state whether or not it is likely that all of the Earth is made of these rocks. Justify your answer.
b. Use the data given for Jupiter and Earth to explain why Jupiter is described as a ‘gas giant’. c. Callisto is a moon and Mercury, of similar size, is a planet. What is the difference between a moon and a planet?
5. Final Examination 2022, Question 6
An object weighs less on the Moon than on Earth. Put a tick () in the box next to the sentence that explains why:
It is colder on the Moon than on Earth. The Moon has a smaller radius than Earth. The Moon has a smaller mass than Earth. The Moon has no atmosphere.
j Go to page 168 of your Assessment Book to answer more exam-style questions.