The land is the beginning of all history. We think of the land
as a constant, but Idaho's land is always changing. Geology focuses on
three major geological activities in Idaho's history: volcanic
After viewing and discussing Geology, students will be able to:
- Identify some of the forces that have changed or will change Idaho.
- List different ways in which geology can affect daily life.
- Understand how individuals can take advantage of geological effects.
Geology reviews three major types of geological activity. The video begins
with the host, Phyllis Edmundson, asking students to think about how Idaho's
land is changing. That leads into a look at geological activity such as lava
flows and geysers.
There is also a discussion about geothermal energy and its uses.
Not all of Idaho's mountains came from volcanic activity. Phyllis introduces
students to the batholith
with its diverse mineral accumulations. She asks students to think about
the impact the batholith
has had on Idaho history.
Idaho's landscape has also been changed by floods. Students learn about
three major floods, the
Missoula, the Bonneville
and the Teton
Dam and the aftermath of each one.
The third geological activity reviewed in the video is an earthquake.
Phyllis uses the example of the 1983
Borah earthquake to show what earthquakes do to the land and the people.
Phyllis closes by reviewing the three major geological activities. She
challenges students to look around at their environment, and reinforces
the idea that Idaho's land is always changing.
- Make a volcano with the following recipe: Combine 1 cup flour, 1 cup
salt, 1/2 cup water. Shape dough into the form of a volcano. Let dry.
Paint with food coloring as desired. Makes enough for one student.
- Examine different types of rocks. Have students write down words
that describe each rock and where they might have come from.
- Have the students stack different layers of clay and use that to show
land shifts and uplifts.
- Lead students in a discussion. Ask the following questions:
What is a volcano?
Where are volcanoes found?
Have you ever been in an earthquake?
Have you seen one on television?
QUESTIONS FROM VIDEO
- What would you think if you saw a river of fire? Or if you saw the
- Have you ever picked up a rock and wondered where it came from? What
it's made of?
- Why do you suppose they call this Craters of the Moon?
- Why does it look like this?
- Can you think of another place in or near Idaho where the earth's
crust is thin?
- How do you think people use geothermal water?
- Can you find the batholith on a map?
- Is it close to where you live?
- Can you name any of the changes in the land that resulted from the
- Did the Bonneville flood leave any rocks near where you live?
- Do you know what an earthquake is? What it might feel like?
Batholith -A large amount of rock pushed up from beneath
the earth's crust but never breaking the surface
Crater -A hollow area that looks like the inside of a
Earthquake -A shaking or trembling of the ground
Erode - To wear or wash away
Geological activity -A movement or action having to do
with the earth
Geologist -A person who studies geology
Geology - The science that deals with the earth and its
structure,the plants, the animals and the human life on it
Geothermal-Heated by the molten rock underneath the earth's
Geysers - An underground pool of hot water that is shot
up into the air
Lava -Melted rock that flows out of a volcano
Legacy -Something left behind for the next generation
Magma -Melted rock which flows beneath the earths surface
Volcano -An opening in the earths surface through which
lava, ash and gases flow
FOLLOW UP DISCUSSION AND QUESTIONS
- Discuss what geological features are in your area and what activity
- How can geological features affect our lives?
- What were the three main geological forces presented in the video
and what were the effects of those forces?
- Discuss the possibility of geological action occurring in your area
today. What kind could it be? What would be the effect? How would everyone
deal with it?
- Gather a group of rocks and try to identify each kind. Discuss where
they were found and how they got there.
- To demonstrate the effects of earthquakes on buildings, have students
build sugar cube structures on top of a block of gelatin. Once a structure,
however simple or complex, is built, have students tap the gelatin to
simulate an earthquake. Have the students try different structures to
determine what kind of building has the best chance to hold up during
- Review how other cultures have explained geological phenomenon by
the use of myths and gods. Have students write a mythological story
to explain a geological event.
- Place a number of small rocks in the bottom of an empty ice cream
box. Fill with water and freeze. Remove from the container and scrape
the "glacier" along the ground. Discuss how glaciers changed
Idaho Relief Map
Paste outline drawing on a stiff backing such as cardboard. using different
peas and beans, create a montage of Idaho showing the various geological
features. Indicate in the legend box which bean or pea stands for which
type of feature.
Blank Idaho Map