Chp 8 & 9 HW

Which of the eight planets has a smaller mass than Mercury?

You can't fool me, Mercury has the smallest mass of the eight planets

In its overall composition, the Moon roughly resembles:

the Earth's crust and mantle

Earthquake producing faults are much more likely to be found

on the boundaries of continental plates, where they meet other plates

The average temperature on planet Earth is higher than you would expect just from the heating of sunlight alone. What is the explanation for this?

carbon dioxide (and other gases) in the atmosphere cause a greenhouse effect

If no one has ever visited the core of the Earth, how do we know that it is made of metals?

circulating liquid metals in the core set up a large (measurable) magnetic field

Which of the following is a way that the planet Mercury is similar to the Moon?

its surface is heavily cratered

According to the theory of plate tectonics

slow motions within the mantle of the Earth move large sections of the crust around

Scientists now understand that the Earth consists of layers, with the densest materials in the core. What allowed the differentiation of the Earth's layers to happen?

the early Earth must have been so hot it was like a liquid and heavier things sank to the middle

What makes astronomers think that impact rates for the Moon must have been higher earlier than 3.8 billion years ago?

there are ten times more craters on the older highlands than the younger maria

What is one important way in which both the Moon and Mercury are different from Earth?

they do not have an atmosphere