Ⅰ.
Rules of chemical reactions and energy changes
Lesson 1: Changes in Matter
Lesson 2: Rules of Chemical Reactions
Lecture 3: Chemical Reactions and Energy Changes

Ⅱ.
Abstention and Weather
Lecture 4: Layered Structure and Characteristics of Abstention
Lesson 5 Water in the Atmosphere
Lesson 6: Atmospheric Pressure and Wind
Lesson 7: Weather Changes

Ⅲ.
Exercise and Energy
Exercise 8
Lesson 9: Work and Energy

Ⅳ.
stimulus and response
Lesson 10: Sense Organs
Lecture 11: Neurons and the Nervous System
Lesson 12: Hormones and Homeostasis

[Book within a Book] Exam Preparation

[Special Edition] Correct Answers and Substantial Solutions

[Concept Learning] Understanding the Core Concepts of the Textbook
1.
Concept Reinforcement Learning: You can perfectly complete a concept by composing concepts and problems in a 1:1 ratio.
- The textbook's core concepts are organized with various pictures and materials for easy understanding.
- You can focus on learning key concepts and explorations with exploration, data, and concept magnifiers.
- You can immediately check whether you have accurately understood what you have learned by solving problems.

2.
Final Study: You can solidify your skills with final questions.
- You can comprehensively conclude your learning by lecture with a variety of practical problems that are sure to appear on the exam, as well as difficult and descriptive problems with differentiating power.
- Only the key concepts for each chapter are summarized at a glance, and you can evaluate your skills with the unit summary questions.

[Exam Preparation] Developing a Practical Sense for Each Type of Exam
1.
River-by-river problems
- You can check the key concepts by filling in the blanks in the key summary for each lecture.
- You can focus on practicing problems that strengthen your calculation skills, strengthen your research materials, and easily-mistakeable types with traps by class.
- Two sets of questions are provided per lecture to match the scope of school exams, allowing you to prepare for the exam.

2.
Problems by chapter
- You can prepare for school exams by providing predicted school exam questions for each unit.
- You can check your skills by solving problems of similar type and difficulty level to actual school exams.

[Correct Answers] Learn on your own with detailed explanations.
- Contains Olli's own know-how, such as data analysis, integrated problem analysis, and concept addition.
- We have provided friendly solutions to help you easily understand the correct and incorrect answers through detailed explanations and avoidance of incorrect answers.