Part of GED® Science: Physical Science
GED® Science: Chemical Reactions & Conservation of Mass (Deep Dive)
A deep dive into chemical change, expanding the single 'Chemical Reactions & Conservation of Mass' lesson from the GED® Physical Science course into a full mini-course. You'll learn what happens in a reaction, why mass is conserved, how to balance equations, the main types of reactions, how reactions absorb or release energy, and what makes reactions speed up. Plain language, all-new labeled diagrams, common-misconception warnings, and GED®-style practice with full explanations throughout.
📚 Course Curriculum
In a chemical reaction, one or more substances change into new substances with different properties. The bonds between atoms break and re-form, rearranging the atoms …
Open trial session →Since atoms are only rearranged in a reaction (not created or destroyed), the total mass doesn't change. This is the law of conservation of mass: …
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Because atoms are conserved, a chemical equation must be balanced — there has to be the same number of each kind of atom on both …
Open trial session →Most reactions fit a few recognizable patterns. Knowing the common types helps you predict what happens. [[figure:reaction_types Synthesis combines, decomposition breaks apart, and combustion burns …
Open trial session →Every reaction involves energy, because breaking and forming bonds takes and releases energy. The overall result puts reactions into two groups. [[figure:exothermic_endothermic Exothermic reactions release …
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Some reactions are fast (an explosion) and some are slow (iron rusting). The reaction rate is how fast a reaction happens, and several factors can …
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Course Syllabus
Course Outcomes
📝 Practice Questions
30 interactive questions with instant feedback and explanations.
Enroll for free to unlock the full practice bank after the trial sessions.