emit
Definition
Emit means to release a substance into the environment. This can be done by a natural process, such as when plants release oxygen into the air, or by a human activity, such as when cars release exhaust fumes into the air.
The substances that are emitted can be gases, liquids, or solids. They can be harmful to the environment and to human health. For example, carbon dioxide is a greenhouse gas that can contribute to climate change. Nitrogen oxides can cause smog, which can irritate the lungs and worsen asthma. Particulate matter is a type of air pollution that can cause respiratory problems and even death.
There are a number of things that can be done to reduce emissions, such as using cleaner fuels, improving energy efficiency, and planting trees. It is important to reduce emissions because they can have a negative impact on the environment and on human health.
How can the word be used?
A car emits exhaust fumes.
Different forms of the word
Noun: emission.
Adjective: emissive.
Verb: to emit, discharge, release.
Synonyms: produce, give off, emanate, radiate.
Antonyms: absorb, take in, ingest.
Etymology
The word "emit" comes from the Latin word emittere, which means "to send out". The word emittere is made up of two Latin words: e (out) and mittere (to send).
Question
Write a sentence which uses the word emit.
AQA Science Exam Question and Answer
Question:
Explain the concept of "emit" in the context of energy and its significance in various processes. Describe how different sources, such as fossil fuels and renewable energy, emit energy in the form of heat, light, and sound. Provide examples of everyday applications where energy is emitted and transformed for practical use.
Answer:
"Emit" refers to the release or production of energy in various forms, such as heat, light, and sound. When energy is converted from one form to another, it is emitted during the process. For instance, burning fossil fuels like coal and oil emits heat and light, while renewable energy sources like solar panels and wind turbines emit electricity. In a lightbulb, electrical energy is emitted as light, and in a speaker, electrical energy is transformed into sound.
Everyday applications of energy emission are abundant. In a car engine, fuel is burned, emitting heat and mechanical energy that propels the vehicle forward. In a microwave oven, electricity is converted into microwaves, which emit energy to heat food. Understanding how energy is emitted and converted is fundamental in developing efficient technologies, advancing energy sustainability, and improving various aspects of our daily lives.