Flashcards — Chapter 1 🃏

Time for something fun: play with concepts! You have two modes — review cards at your own pace, or take a quick timed quiz with scoring. Your best score is saved every time. Ready? 👇

🎮 How it works

• Study Mode 🎴 — Cards appear one at a time. See the question, think of the answer, then click to reveal it. Mark whether you knew it. Perfect for relaxed review that builds memory.

• Quick Quiz ⚡ — 10 multiple-choice questions, 20 seconds each. Score based on speed. Three correct answers in a row = bonus streak 🔥. Your best score saves automatically.

💡 Note: Progress is stored in your browser (no login needed).

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Why this works 🤔

This is active recall, a well-researched learning technique. Instead of re-reading (which tricks your brain into thinking you know something), you challenge yourself. Whether you get it right or wrong, your brain locks in the concept better than passive review ever could.

Studies show active recall is several times more effective than rereading. So don't just read — test yourself 💪.

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📊 Topics covered

20 cards spanning:

• The SI system & base units
• Measurement & accuracy
• Scientific notation & prefixes
• Dimensional analysis
• Significant figures
• Unit conversion (factor-label method)

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What's next?

After reviewing these cards, tackle Worked Problems (§1.10) and Practice Problems (§1.11). That's where you see these concepts in action.

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