An Introduction to Geography
ANNOUNCER: Section 4. You will hear a lecturer’s introduction to a geography module. First, you have some time to look at questions 31 to 40. Now listen carefully and answer questions 31 to 40.
SPEAKER: Welcome to your introductory geography lecture. We will begin with some basics.
SPEAKER: First, what do we learn by studying geography? We learn about the processes that have affected and continue to affect the Earth’s surface.
SPEAKER: But geography is not only about the Earth itself. It also helps us understand the relationship between the environment and the people who live in it.
SPEAKER: Geography has two main branches. The first studies the physical nature of the planet and its natural features.
SPEAKER: The second focuses on how human activities affect the planet.
SPEAKER: For example, the use of carbon fuels has a major impact on the environment.
SPEAKER: During the semester we will explore several specific areas of geography.
SPEAKER: One of them is biophysical geography, which studies the natural environment and living organisms.
SPEAKER: Another is topography, the study of the shape of land and oceans.
SPEAKER: We will also study political geography and social geography, which examine human communities.
SPEAKER: Then there is economic geography, which focuses on resources and their use, such as agriculture.
SPEAKER: Another field is historical geography, which studies how people and environments have changed over time.
SPEAKER: We will also explore urban geography, which examines cities, their services, and migration patterns.
SPEAKER: Finally, there is cartography, the science of map making.
SPEAKER: Geography is important because it helps us understand our surroundings and identify environmental problems.
SPEAKER: Without this knowledge, we could not find solutions to these issues.
SPEAKER: Now let’s look at what geographers actually do.
SPEAKER: First, they collect data. You will practice this during your first field trip.
SPEAKER: One method is conducting a census, which counts the population in a specific area.
SPEAKER: Geographers also create images of the Earth’s surface using computer technology and satellites.
SPEAKER: In the past, explorers only had pens and paper when mapping the world.
SPEAKER: After collecting data, geographers must analyze it.
SPEAKER: They search for patterns, especially causes and effects.
SPEAKER: These patterns help us predict and solve problems that affect the world.
SPEAKER: After analysis, geographers must publish their findings.
SPEAKER: One common method is through maps.
SPEAKER: Maps are useful because they are portable and can store a large amount of information.
SPEAKER: However, maps also have a limitation.
SPEAKER: The Earth is three-dimensional, but a map is two-dimensional.
SPEAKER: Because of this, some distortion is unavoidable.
SPEAKER: Geographers also use aerial photographs taken from high altitude.
SPEAKER: These photographs reveal features that are difficult to see from the ground.
SPEAKER: They can show forest diseases, traffic patterns, and even deep sea information.
SPEAKER: Finally, we use Landsat satellites, which orbit the Earth and send visual data to computers.
SPEAKER: These satellites circle the Earth several times each day and provide a huge amount of geographical information.
SPEAKER: For example, they help us monitor the weather.
SPEAKER: Now we will watch a short presentation demonstrating these tools.
ANNOUNCER: That is the end of Section 4. You now have half a minute to check your answers.
