Chemistry: A Blend of Science and Technology
Like all scientists, chemists try to describe and explain the world. Chemists start by asking questions such as these:
• Why is natural gas such an effective fuel?
• How can we separate a mixture of crude oil and water?
• Which materials dissolve in water?
• What is rust and why does it form?
To answer these questions, chemists develop models, conduct experiments, and seek patterns. They observe various types of chemical reactions, and they perform calculations based on known data. They build continuously on the work and the discoveries of other scientists. Long before humans developed a scientific understanding of the world, they invented chemical techniques and processes. These techniques and processes included smelting (melting) and shaping metals, growing crops, and making medicines. Early chemists invented technological instruments, such as glassware and distillation equipment. Present-day chemical technologists continue to invent new equipment. They also invent new or better ways to provide products and services that people want. Chemical technologists ask questions such as the following:
• How can we redesign this motor to run on natural gas?
• How can we contain and clean up an oil spill (overflow)?
• What methods can we use, or develop, to make water safe to drink?
• How can we prevent iron objects from rusting?
effective: hiệu quả, hữu hiệu
dissolve: hòa tan
rust: gỉ (sắt, kim loại)
observe: quan sát
perform: biểu diễn
service: dịch vụ
spill = overflow: tràn ra
prevent: ngăn cản