key terms

4. Ratios: Different fractions that show the same amount (like $1/2$ and $5/10$).
5. A math sentence saying two ratios are equal.
6. Volume: The amount of liquid added to a powder or strong drug to water it down.
8. A liquid mix of 5% sugar (dextrose) in water for IVs.
10. use date: The date after which a mixed medicine should not be used.
11. A way to compare two numbers or amounts.
14. Time: A 24-hour clock (like 1300 for 1:00 PM) to avoid AM/PM mix-ups.
15. Alternate Method: A math trick to find how much of two different strengths are needed to make a new strength.
17. Gravity: How heavy a liquid is compared to water.
18. Volume: The final amount of liquid after everything is mixed together.
20. A number showing the electrical charge of an atom or part of a drug.
21. A tiny old weight unit; 1 grain is about 65 milligrams.

1. Volume: The space a dry powder takes up inside a bottle.
2. Strength: Showing concentration as 1 part drug in a certain amount of liquid (like 1:1000).
3. To mix or change ingredients to make a custom medicine.
4. Solution: A liquid with salts (like sodium) that help the body work.
7. Zero: A zero written before a decimal point (0.5 instead of .5) to prevent mistakes.
9. system: Measuring with kitchen tools like teaspoons and cups.
11. Ratio: A flipped fraction (the reciprocal of $2/3$ is $3/2$).
12. Numeral System: Using letters like I, V, and X for numbers.
13. How long a drug stays good and safe to use.
16. System: An old measuring system using inches, pounds, and gallons.
19. System: The main medical measuring system using grams, liters, and meters.