About This Chapter
Who's it for?
Anyone who needs help learning or mastering middle school physical science material will benefit from taking this course. There is no faster or easier way to learn middle school physical science. Among those who would benefit are:
- Students who have fallen behind in understanding reaction processes and components
- Students who struggle with learning disabilities or learning differences, including autism and ADHD
- Students who prefer multiple ways of learning science (visual or auditory)
- Students who have missed class time and need to catch up
- Students who need an efficient way to learn about reactions
- Students who struggle to understand their teachers
- Students who attend schools without extra science learning resources
How it works:
- Find videos in our course that cover what you need to learn or review.
- Press play and watch the video lesson.
- Refer to the video transcripts to reinforce your learning.
- Test your understanding of each lesson with short quizzes.
- Verify you're ready by completing the Reactions chapter exam.
Why it works:
- Study Efficiently: Skip what you know, review what you don't.
- Retain What You Learn: Engaging animations and real-life examples make topics easy to grasp.
- Be Ready on Test Day: Use the Reactions chapter exam to be prepared.
- Get Extra Support: Ask our subject-matter experts any question about reactions. They're here to help!
- Study With Flexibility: Watch videos on any web-ready device.
Students will review:
This chapter helps students review the concepts in a reactions unit of a standard middle school physical science course. Topics covered include:
- Methods for balancing chemical equations
- Reactant atoms and molecules
- Evaporation, condensation and freezing
- Melting, sublimation and deposition
- Methods for determining pH of acids, bases and neutral solutions
1. Chemical Reactions and Balancing Chemical Equations
In this lesson, you'll learn how to balance a chemical reaction equation using the conservation of matter law. You'll also learn how to write both word and formula equations, what the subscripts after a letter mean and what the numbers in front of compounds mean.
2. How Chemical Reactions Form New Products
After watching this video, you will be able to explain what a chemical reaction is and how the products can have completely different properties to the reactants. A short quiz will follow.
3. Phase Change: Evaporation, Condensation, Freezing, Melting, Sublimation & Deposition
Substances on Earth can exist in one of four phases, but mostly, they exist in one of three: solid, liquid or gas. Learn the six changes of phase: freezing, melting, condensation, vaporization, sublimation and deposition.
4. Acidic, Basic & Neutral Solutions: Determining pH
After watching this video, you will be able to explain the difference between acidic, basic, and neutral solutions and explain the concept of pH. A short quiz will follow.
5. Neutral Solution: Definition & Examples
Did you know that tap water and even human blood are neutral solutions? Continue reading to learn what neutral solutions are and how to identify them.
6. Physical Reaction: Definition & Examples
Did you know the cycle of freezing water to make ice and melting ice to produce water is considered a physical reaction? In this lesson, we'll learn more about physical reactions, define what a physical reaction is, and look at some examples.
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Other chapters within the Middle School Physical Science: Help and Review course