Lesson 3 | Earth’s Surface

Lesson 3 | Earth's Surface

Student Labs and Activities

Launch Lab Content Vocabulary Lesson Outline MiniLab Content Practice A Content Practice B Language Arts Support School to Home Key Concept Builders Enrichment Challenge Lab A Lab B Lab C Chapter Key Concepts Builder

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Launch Lab

LESSON 3: 15 minutes

How can you measure topographic relief?

Relief describes differences in elevation for a given area. The area might have tall mountains or deep valleys. In this lab, you will use simple materials to measure relief on a model landscape.

Procedure

1. Read and complete a lab safety form.

2. Form some salt dough into a thick disk that is slightly larger than your hand.

3. With your fingers spread apart, press your hand firmly into the dough so that some of the dough squeezes up between your fingers.

4. Stretch dental floss across the finger impressions in the dough. Slice off a section of the dough model by pressing the dental floss down through the dough.

5. Also make a slice through the palm section of your dough model.

6. Observe the profiles of your two cross sections. Use a ruler to measure the difference between the highest and lowest points within the palm section.

7. Measure the difference between the highest and lowest points within the fingers section.

Data and Observations

Think About This

1. What is the difference in elevation between the highest and lowest points of your hand print?

2.

Key Concept Compare and contrast your model features. How are they similar

to features on Earth?

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Content Vocabulary

LESSON 3

Earth's Surface

Directions: In this word search puzzle, find and circle the four terms listed below. Then write the definition on the line after each term for 1?4 and complete the statement in 5.

feature

landform

mountain

plain

plateau

L HOP T ACN LM AHAD L K I LMU NWE F E A T U R E DSGRTA I TYL F I TNS E PNUA O J U I T R F EGN ROP LAT EAUC MPADPOSQ I S

1. landform

2. plain

3. plateau

4. mountain

5. Each of the terms in questions 1?4 is an example of a(n)

on

Earth.

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Lesson Outline

LESSON 3

Earth's Surface

A. Oceans and Continents

1. Earth has a variety of valleys.

, including mountains and

2. Long chains of high mountains and deep canyons appear on dry land and on the

floor.

B. Landforms

1. Landforms are surface.

formed by processes that shape Earth's

2. The characteristics of landforms

over time.

3. One characteristic of landforms is of the landform above sea level.

, which is the height

a. The difference in elevation in a given area is called

.

b. If the difference between the highest and lowest elevation of an area is small, that

area has

. If the difference between the highest and

lowest elevation of an area is large, that area has

.

4. The shape of a given area is called the area's

.

5. Landforms with low relief and low elevation are called

.

They are the most

feature on Earth.

6. Landforms with low relief and high elevation are called

.

They can form when forces within Earth

layers of rock.

7.

are landforms with high relief and high elevation. They

are Earth's

landforms.

a. Some mountains form when volcanoes, builds up.

, material from

b. Some mountains form when forces inside Earth fold, push, or uplift large blocks

of

.

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Lesson Outline continued

8. The United States has

major landform regions.

a. The East Coast and the Gulf Coast have

.

b. The

formed about 480 million years ago. After millions

of years of weathering and erosion, these mountains are than they once were.

c. The central part of the United States is a flat, grassy area called

the

.

d. The young, rugged Rocky Mountains are in the United States and Canada.

e. An area of high, rugged land in the Southwestern United States is the

. A river has cut a huge valley through this landform,

forming the

.

f. The western part of the United States has many different

ranges. There are no

plains in the West.

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