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# chemical

«chemical» in Mova's school dictionary: **a substance, especially one made or used in science or…** — its meaning for a pupil, its sense in the lessons and examples, with 5 sentences of Mova's corpora that use it.

### part of speech

noun (a chemical, chemicals); adjective (chemical); adverb chemically

### meaning for a pupil

1) A chemical is a substance, especially one made or used in science or industry, such as bleach, salt or oxygen. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/chemical/#m1)

2) Chemical as an adjective means to do with chemistry or with how substances change: a chemical reaction. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/chemical/#m2)

### sense in the lessons

In science everything is made of chemicals, including water and air; a chemical reaction makes new substances (burning, rusting, baking a cake). In safety lessons household chemicals like bleach, cleaners and weedkiller are dangerous: never mix them, drink them or keep them in drink bottles, and keep them out of reach of little children. Phrases: chemical reaction, household chemicals, harmful chemicals, chemical change.

### examples

- Bleach is a strong chemical, so don't touch it. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/chemical/#x1)
- Never mix cleaning chemicals; they can make poisonous gas. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/chemical/#x2)
- Rust is caused by a chemical reaction between iron, water and air. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/chemical/#x3)
- Water is a chemical made of hydrogen and oxygen. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/chemical/#x4)
- Keep chemicals in their own bottles with labels. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/chemical/#x5)
- Baking a cake causes chemical changes in the mixture. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/chemical/#x6)
- The scientist wore goggles when she used the chemicals. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/chemical/#x7)
- Some farmers spray chemicals on crops to kill pests. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/chemical/#x8)
- Now, one day Edmund made a new lantern out of something chemical that he sneaked from the school laboratory. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/chemical/#x9)

### note

Countable as a noun: a chemical, chemicals. A «chemical change» makes something new and is often hard to undo; a «physical change» (like melting ice) does not make a new substance. Myth: «chemical» does not always mean harmful or unnatural; but unknown liquids should never be tasted or sniffed.

### In the corpora

- [Running and other exercise release chemicals in the brain that lift mood, and free weekly parkruns are open to all ages.](https://md.mova.elamur.ai/free/en/corpora/school/adult-life/29-screens-diets-sofas-and-late-nights/12/)
- [The bombardier beetle mixes two chemicals in its body to make a spray of about 100 degrees that it shoots from its tail end.](https://md.mova.elamur.ai/free/en/corpora/school/biology/37-butterflies-beetles-flies-mosquitoes-grasshoppers/11/)
- [No real animal breathes fire; the bombardier beetle sprays a nearly boiling chemical mix from a tough chamber at attackers.](https://md.mova.elamur.ai/free/en/corpora/school/biology/146-shrek-s-dragon-real-dragons-and-lizards/5/)
- [When a dog and its owner look at each other, both get a rush of a bonding chemical in the brain.](https://md.mova.elamur.ai/free/en/corpora/school/biology/192-dogs-from-wolves-to-hundreds-of-breeds/18/)
- [Chocolate is poisonous to dogs, because it contains a chemical that dogs cannot break down well.](https://md.mova.elamur.ai/free/en/corpora/school/biology/225-caring-for-a-pet-needs-dangers-and-responsibility/8/)

### Trees and pragmatics

[Every meaning and example of «chemical» parsed by Mova](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/chemical/), each sentence with its dependency tree and frames.