1.
Acids and bases
01.
Classification of solutions
02 Classification of solutions using indicators
03.
Properties of acidic and basic solutions
04.
Changes when mixing acidic and basic solutions
05.
Use of acidic and basic solutions and acidification

2.
motion of objects
01.
moving object
02.
Expression of object movement
03.
Comparing the speed of objects
04.
Comparing the speed of objects
05.
Safety rules and safety devices related to speed

3.
Structure and function of plants
01.
Cells that make up living things
02.
The appearance and function of roots
03.
The shape and function of the stem
04.
The shape and function of leaves
05.
Movement of water reaching the leaves
06.
The appearance and function of flowers

4.
Earth's movement
01.
Changes in the positions of the sun and stars throughout the day
02.
Earth's rotation
03.
Why day and night occur
04.
Earth's revolution
05.
Why do visible constellations change with the season?

『O2』 is a science textbook that provides vivid examples of actual experiments and observations.
『O2』 Elementary Science contains all the important content from the new 2022 revised curriculum 5 science textbooks, and provides friendly explanations so that even students can understand the content on their own.
The book is structured so that you can study concepts and problems step by step, and with the practical book, you can perfectly prepare for school exams and build confidence in science.


A vivid science textbook! New textbooks reflect O2 elementary science!

[The core of the 5 textbooks!]
It consists of a neat concept summary that includes all the important contents of the five textbooks that reflect the 2022 revised curriculum, and problems suitable for checking learning outcomes.

[Exploration made easier with experimental videos!]
Begin learning through exploration following the textbook flow, and provide experimental videos with QR codes to make exploration easier to understand.

[Comprised of progress books and practical books!]
Learn concepts with the progress book and prepare for school exams with the practice book.
_Progress book: Learn one concept completely through basic problems (key check ▶ true or false quiz ▶ concept problem) and skill problems, and organize it with unit-ending problems.
_Practical Guide: Unit Assessment Preparation (Unit Summary, Note Test, Unit Assessment, Descriptive Assessment, Performance Assessment) and Academic Achievement Assessment Preparation