periodic table

通常は酸っぱい味がし、時には物を燃やしたり溶かしたりすることがある化学物質。科学では、pHレベルが7未満の液体です。

代数学は、文字や記号を使って数値を表す数学の一分野です。特定の数学的規則に従って未知の値を求めるために使用されます。

An atom is the smallest possible part of a chemical element. Everything in the world is made of millions of these very tiny particles.

Atomic relates to the very small parts called atoms that make up everything in the world. It is often used to describe science, energy, or very small things.

Calculus is a high-level branch of mathematics that studies how things change. It uses special symbols to calculate things like the speed of an object or the area of a shape.

A catalyst is something that makes a change happen faster or more easily. In science, it is a substance that speeds up a chemical reaction without being changed itself.

回路（かいろ）は、電気が流れる完全な道のことです。電気の通り道全体を指します。

The circumference is the distance around the outside edge of a circle or a round object. It is a measurement that tells you how long the boundary of a round shape is.

定数とは、変化しないもののことです。数学では、固定された値を指します。

A decimal is a number that uses a dot to show parts of a whole. It is based on the number ten and helps show values smaller than one.