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Chapter 2 - Investigating Geologic Questions. The earth and its surroundings are full of mysteries. The object of science is to solve those mysteries and help human-kind. Can you name any earth mysteries? What causes . . . . Notes. Can you name any earth mysteries?. Earthquakes Volcanoes

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chapter 2 investigating geologic questions
Chapter 2 - Investigating Geologic Questions

The earth and its surroundings are full of mysteries. The object of science is to solve those mysteries and help human-kind.

Can you name any earth mysteries?

What causes . . .

can you name any earth mysteries
Can you name any earth mysteries?

Earthquakes

Volcanoes

Tsunami

Flooding

can you name any other earth mysteries
Can you name any other earth mysteries?

There is a layer of halite (table salt) beneath the floor of the Mediterranean Sea.

How come it hasn’t dissolved?

How did it get there?

mediterranean sea salt layer
Mediterranean Sea Salt Layer

Why doesn’t it dissolve?

It is protected by an overlying layer of silt and clay that doesn’t let the seawater contact the salt.

mediterranean sea salt layer9
Mediterranean Sea Salt Layer

How did it form?

As seawater evaporates, salt is left behind.

A new question then presents itself.

qualitative versus quantitative data
Qualitative Versus Quantitative Data

Quantitative data: numeric measurements (conveyed with numbers)

Qualitative data: descriptions (conveyed with words or sketches)

02.07.a

geologic time
Geologic Time

Most recent (lots of mammals)

Four main parts of geologic time scale (based on fossils)

Dinosaurs and first flowering plants

Appearance of fish, plants, insects, reptiles, etc.

Before shells and hard parts

If Earth history were 1 year

02.09.b1

02.09.c

slide15

What Formed This Crater?

Observe this scene and then think of options for all the ways in which a crater could form

02.12.a1

slide17

Observe the rocks in the rim of the crater

02.12.a2

Rim of crater has angular blocks of fractured rock

slide19

Observe this geologic cross section across the crater. The crater is within sedimentary layers.

02.12.b1

slide21

Models for Formation of the Crater

Volcanic explosion

Meteoroid impact

Rising salt

02.12.c1-3

List predictions that arise from each model and how you could test each prediction.

What type of data would you like to have?

slide23

Investigation: What Formed Upheaval Dome?

Circular feature

Layers bent upward

02.13.a1

slide25

Possible explanations:(1) rising salt, (2) rising magma, and (3) meteoroid impact

02.13.b2

List at least one prediction that follows from each explanation

What types of information would you like to know to further constrain the origin of the dome?

slide27

Compare the shapes of the continental edges on opposite sides of the Atlantic Ocean

East coast curves in, Africa curves out

Corner of Brazil matches indention in Africa

From inside front cover

slide29

Hypothesis of Continental Drift

Continents fit back together because once joined

02.05.a1

slide33

Glaciers and Continental Drift

Scratched Rocks

Directions ice sheets moved on each continent

02.05.c

quote
Quote

Go, my sons [and daughters…], climb the mountains, search the valleys, the deserts, the seas shores, and the deep recesses of the earth. Mark well the various kinds of minerals, note their properties and their mode of origin.

(Petrus Severinus, 1571)