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fast

Primary Information
Secondary Information

Definition

Fast is a word that has many different meanings in science. In physics, fast means to move or happen quickly. For example, the speed of light is very fast. In chemistry, fast can mean to react quickly. For example, a chemical reaction that happens in a fraction of a second is considered to be very fast.

Fast can also mean to eat very little or nothing at all. This is called fasting, and it is often done for religious or health reasons. When people fast, they usually only drink water or clear liquids.

In biology, fast can mean to live for a short time. For example, a mayfly only lives for a day or two.

How can the word be used?

The car was fast, and it took us only an hour to get to the beach.

fast

Different forms of the word

Adjective: fast, rapid, quick.

Adverb: fast, quickly, rapidly.

Noun: fast, fasting.

Verb: to fast, to abstain from food.

Etymology

The word "fast" comes from the Old English word fæst, which means "firm," "steadfast," or "secure." It was first used in English in the 8th century, and it is still used today to refer to something that is moving or happening quickly.

Question

What comes to mind when you think of the word fast?

AQA Science Exam Question and Answer

Question:

Explain the concept of fast fashion and its environmental impact. Discuss the factors that contribute to the rapid growth of fast fashion and the consequences for the environment and society. Provide specific examples to illustrate the implications of fast fashion on sustainability and consumer behaviour.

Answer:

Fast fashion refers to the rapid production and consumption of inexpensive clothing, designed to follow the latest fashion trends and quickly reach consumers. This model has a significant environmental impact due to its reliance on cheap materials, high water consumption, and increased waste generation. The rapid growth of fast fashion is driven by consumer demand for affordable and constantly changing styles, coupled with aggressive marketing strategies and shortened production cycles.

As a result, the fashion industry is one of the major contributors to pollution, greenhouse gas emissions, and resource depletion. The production of synthetic textiles and the use of harmful chemicals in dyeing and finishing processes also pose risks to environmental and human health.

For example, the fashion industry is responsible for approximately 20% of global wastewater and consumes vast amounts of water in countries already facing water scarcity issues.

To address these concerns, sustainable fashion movements and conscious consumer choices are gaining momentum to promote ethical and environmentally friendly practices.