chemical

化学的な、化学の

物質や、混ざったり反応したりする時の変化に関する。

やさしい英語で： Connected with substances and the ways they change when they mix or react.

• A chemical reaction produced heat.
• Scientists tested the water for chemical changes.
• Do you know the chemical formula for salt?

よく使う表現： chemical reaction, chemical formula, chemical change, chemical composition

化学物質、薬品

決まった成分からなる物質。科学、農業、掃除、製造などでよく使われる。

やさしい英語で： A substance with a particular makeup, often used in science, farming, cleaning, or making things.

• Wear gloves when handling this chemical.
• The factory stores chemicals in locked rooms.
• Which chemical caused the water to change colour?

類義語： substance

よく使う表現： dangerous chemical, chemical spill, industrial chemical

化学物質、合成物質

自然から直接取るのではなく、人が作った物質。

やさしい英語で： A substance made by people rather than taken directly from nature.

• I avoid harsh chemicals in my garden.
• This cleaner contains no synthetic chemicals.
• She prefers natural dyes to chemicals.

類義語： synthetic substance

よく使う表現： synthetic chemical, harsh chemical, chemical additives