1.
Night sky observation

Day 1: The shape and surface of the moon
Day 2: Changes in the shape of the moon over several days
Day 3 Solar System Members
Day 4: Model of the Solar System Planets
Day 5: Stars and Constellations
Day 6: Organizing your thoughts into a network and evaluating each unit

2.
Biology and Environment

Day 7: Ecosystems and Ecosystem Components
Day 8 Biological Element Classification
Day 9: The relationship between eating and being eaten
Day 10: The Impact of Human Activities on the Ecosystem
Day 11: What You Can Do to Protect the Ecosystem
Day 12: Organize your thoughts into a network and evaluate each unit.

3.
Various gases

Weight of the aircraft on the 13th day
Changes in gas volume according to temperature on the 14th day
Changes in gas volume according to pressure on the 15th day
Day 16: Example of how the volume of a gas changes depending on temperature or pressure
Day 17 Gases used in daily life
Day 18: Organizing your thoughts into a network and evaluating each unit

4.
Climate Change and Our Lives

Day 19 Climate Change Phenomenon
Day 20: The Impact of Human Activities on Climate Change
Day 21: The Seriousness of Climate Change
Day 22: The Impact of Climate Change on Our Lives and the Environment
Day 23: How to Respond to Climate Change
Day 24: Organizing Your Thoughts into a Network and Evaluating Units

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

[The core of the 7 textbooks!]
It consists of a neat concept summary that includes all the important content of the seven textbooks that reflect the 2022 revised curriculum, and problems suitable for checking learning outcomes.

[Explore more easily with experiments and helpful videos!]
Begin your learning with exploration following the textbook flow, and provide experiment videos and helpful videos via QR codes to make exploration easier to understand.

[6 pages a day, complete your science studies in 24 days!]
Complete everything from concepts to problems in one day with a 6-page daily schedule.

[Comprised of progress books and practical books!]
Learn concepts with the progress book and prepare for school exams with the practice book.
Progress: Step-by-step learning (start with exploration → understand the concept → complete with problems → conclude the unit_organize into a network of thoughts, evaluate the unit)
_Practice Book: Unit Assessment Preparation (Unit Summary, Note Test, Unit Assessment, Descriptive Assessment, Performance Assessment)

『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 7 science textbooks, and provides friendly explanations so that even students can understand the content on their own.
The book is structured in stages 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.