Convert Measurement Units
Name Period
Objectives / Objetivos
Content Objective: I can convert measurement units using ratios and conversion factors.
Language Objective: I can explain my conversion using the words conversion factor, unit, equivalent, and ratio.
Key Idea / Idea clave
Dimensional Analysis & Unit Conversions. 1. Write the given measurement as a fraction over 1. 2. Multiply by conversion ratios arranged so unwanted units cancel diagonally. 3. Multiply numerators, multiply denominators, and simplify the remaining unit
I Notice / Observo
- Why might the blueprint and the parts catalog use different units?
- How many inches are in 1 foot? How many feet in 1 yard?
I Wonder / Me pregunto
- How do you decide whether to multiply or divide when converting?
Vocabulary / Vocabulario
| Term / Término | Definition / Definición |
|---|---|
| Convert Measurement Units Convertir unidades de medida | Rename a measurement in a different unit without changing its amount. Expresar una medida en una unidad diferente sin cambiar su cantidad. |
| Conversion Factor Factor de conversión | A ratio that helps you change one unit into another. Una razón que te ayuda a cambiar una unidad por otra. |
| Unit Unidad | A standard amount used to measure, like an inch or a liter. Una cantidad estándar para medir, como una pulgada o un litro. |
| Equivalent Equivalente | Having the same value, just in different units. Tener el mismo valor, solo en unidades distintas. |
| Ratio Razón | A way to compare two amounts, like 3 to 2. Una manera de comparar dos cantidades, como 3 a 2. |
| Customary units Unidades usuales (sistema inglés) | The U.S. way of measuring, like inches, feet, and pounds. La forma de medir de EE. UU., como pulgadas, pies y libras. |
Practice Preview / Vista previa de práctica
Read each task. Show your work in the spaces provided and explain how you know.
1. How many inches are in 7 feet?
- A 70 inches
- B 72 inches
- C 84 inches
- D 96 inches
Answer:
2. Match each measurement to its equivalent value.
Write the letter of the matching item in the blank.
| 1. | 3 yards | A. | 48 inches | |
| 2. | 4 feet | B. | 80 ounces | |
| 3. | 5 pounds | C. | 72 inches | |
| 4. | 2 yards | D. | 3 feet | |
| 5. | 36 inches | E. | 9 feet | |
| 6. | 3 pounds | F. | 48 ounces |
3. A shelf is 30 inches long. How many feet and inches is that?
- A 1 foot 18 inches
- B 2 feet 6 inches
- C 2 feet 8 inches
- D 3 feet 0 inches
Answer:
4. Find the Conversion Error
Which step has the mistake, and what should it be?
Reflection / Reflexión
One thing I learned today / Una cosa que aprendí hoy: