GRADE 8 SCIENCE · CHAPTER 2
Matter & chemical change
Study each lesson in order, or choose the idea you need today.
- Choose a book
- Choose a chapter
- Study a lesson
Chemical change
Count atoms in chemical equations
Use coefficients and subscripts to check conservation of each element in a simple equation.
Chemical structure
Distinguish elements, compounds and mixtures
Use particle descriptions to classify elements, compounds and mixtures.
AN EXAMPLE FROM THIS CHAPTER
In 2H2 + O2 → 2H2O, how many hydrogen atoms are on the left?
Show answer & explanation
4
The coefficient 2 multiplies the 2 hydrogen atoms in each H2 molecule.
Curriculum & source notes
These are original Little Play study books organized around U.S. school topics. The official curriculum references below guide topic scope and progression. Coverage is selected, not a complete curriculum or a verified match to every state standard. They are not copies of a publisher’s textbook. Check your school’s syllabus and book edition.
High-school courses can be taken in different years. Choose the topic that matches the student’s current course.
Read all curriculum references →