Test 3: Complete Chapter 21 Review

Question 1

The energy obtained from the Sun plays an essential role in making weather patterns, changing the climate and:

• Asupporting the ecosystems
• Bstopping gravity
• Creducing temperatures to zero
• Dcreating tectonic plates

Question 2

Advancements in space technology help in obtaining:

• Arenewable energy with better and efficient utilization of materials
• Bonly fossil fuels
• Ccoal
• Dnothing

Question 3

According to the tidbit, the Earth's core remains molten even after 4.5 billion years partly due to:

• Aradioactive decay and heat left over from planetary formation
• Bthe Moon
• Ctides
• Dwind

Question 4

Surface temperature of a planet depends on distance from the Sun, atmospheric composition and:

• Agreenhouse effects
• Bnumber of moons
• Ccolour
• Dsize of rings

Question 5

Smaller planets like Mars have:

• Aweaker gravitational force
• Bstronger gravitational force
• Cno gravity
• Dsame gravity as Jupiter