Shanghai Edition Junior High School Science, Grade 9, Semester 2: The Origin of Power: From Steamships to Internal Combustion Cars

The Power Revolution: Engine of Civilizational Advancement

Over 200 years ago, humanity's method of power generation underwent a monumental shift fromexternal combustiontointernal combustionin an epic transformation. Watt's improveddouble-acting steam engineand Stephenson's developedhigh-pressure steam engine, opened the gates of the Industrial Revolution, transforming wooden sailing ships into massive steel vessels (such as the 'Titanic'), and gave rise to Stephenson's 'Rocket' locomotive—the father of railways.

Core Technologies: From Heat Engine Theory to Assembly Lines

Four-Stroke Cycle Internal Combustion Engine: Otto proposed the theory, and Benz brought it to life, ushering in a new era of modern transportation.
Father of the Modern Car: In 1886, Karl Benz built the first three-wheeled automobile, marking the expansion of human vision from fixed urban-rural patterns to boundless space.
Social Transformation: Ford introduced theassembly line, not only popularized automobiles but also reshaped human production organization and thinking patterns, demonstrating the profound impact of technology on civilization.

Summary and Reflection

For over 200 years, their inventions, developments, and transformations have brought widespread and profound changes to human material production, social operations, daily life, and even thought patterns—clearly illustrating the immense impact of science and technology on human civilization. The invention of ships ushered in a new era in maritime history, while cars made free mobility a reality.

QUESTION 1

Which engineer is known as the 'Father of the Modern Car' and built the first gasoline-powered internal combustion car in 1886?

Nicholas Otto

Karl Benz

James Watt

Henry Ford

QUESTION 2

Which steam locomotive did Stephenson successfully test in 1829, marking the beginning of a new era in land freight?

Brook

Titanic

Rocket

Hongqi

QUESTION 3

What is the main advantage of internal combustion engines over steam engines?

It is a product of the Industrial Revolution

It uses external combustion

It converts thermal energy into mechanical energy internally, offering higher efficiency and a smaller footprint

It does not require fossil fuels at all

QUESTION 4

Which of the following statements about Ford’s assembly line is correct?

It reduced production efficiency to pursue craftsmanship

It transformed cars from luxury items into mass-market consumer goods

It was first introduced by Karl Benz

QUESTION 5

What characteristics are modern transportation trends increasingly focused on?

Complete reliance on animal power

Green vehicles, efficiency, and intelligence

Simply pursuing massive size

Deep Dive: The Social Impact of the Transcontinental Railroad in 1869

Power Transformation: The Violent Disruption of Social Spatial Distance

In 1869, the first transcontinental railroad across North America was completed. Before this, crossing the continent required stagecoaches, taking months and posing great danger. After the rail link opened, journeys that once took months were reduced to just days. This transportation revolution was not merely the replacement of traditional animal power by modern transport tools—it was also a redefinition of physical distance by industrial might.

1. Based on this lesson, analyze how 'power-driven' innovation changed human perception of space?

Answer:
Power-driven transport (from horse-drawn carriages to steam locomotives) achieved a quantum leap in speed, reducing continental travel time from 'months' to 'days'. This drastic reduction in time cost led to the 'collapse of spatial distance.' Humans were no longer limited by natural stamina or terrain—space felt smaller, and the efficiency of social interaction and resource flow improved fundamentally.

2. Based on your personal experience or research, discuss the importance of ships, cars, and trains in modern society.

Answer:
1. Ships: The arteries of global trade. They carry over 90% of global cargo, enabling cross-ocean resource flow and forming the material foundation of economic globalization. 2. Cars: Enhanced individual mobility. They reshaped urban layouts, making commuting and suburban living feasible, significantly expanding personal activity range and freedom. 3. Trains: The king of high-capacity efficiency. Especially high-speed rail, which excels in long-distance land transport, promotes regional economic integration. Summary: These three form the core of modern transportation networks—not only changing how we travel but profoundly influencing societal production structures and daily rhythms.