62 The History of the Earth: Supplemental Guide 3A | The Earth Inside-Out, Part II
Show image 3A-4: Volcano^10
Now that I have told you about volcanoes, let me explain
one more thing. Thanks to geologists, we have a pretty good
idea when and where these geologic events are likely to occur.
Geologists help predict where volcanoes are most likely to
occur, and this helps keep people safe by discouraging them
from building homes close to dangerous areas. It is not always
possible to predict when and where geologic disasters will occur,
but geologists work hard to give people as much warning as we
can.^11Discussing the Read-Aloud 15 minutes
Comprehension Questions 10 minutes
If students have diffi culty responding to questions, reread
pertinent passages of the read-aloud and/or refer to specifi c
images. If students give one-word answers and/or fail to use
read-aloud or domain vocabulary in their responses, acknowledge
correct responses by expanding students’ responses using richer
and more complex language. Ask students to answer in complete
sentences by having them restate the question in their responses.- Literal What are the names of the layers of the earth? (The
names of the layers of the earth are the crust, mantle, outer
core, and inner core.) - Literal Describe the mantle. (The mantle contains most of the
earth’s rock; it gets hotter and softer closer to the core.) - Literal Describe the outer core. (The outer core of the earth is
melted or molten liquid metal.) - Inferential Describe the inner core. (The inner core is a solid
metal ball.) Why is the inner core solid rather than liquid? (The
inner core is solid rather than liquid because of pressure from
the weight of the rest of the earth.) - Literal What causes a volcano to form? (Hot molten rock or
magma inside the earth makes its way to the surface of the
earth, and causes a volcano to form.)
11 Disasters are sudden events that
cause a lot of damage.
10 What do you see in this picture?