Hydration in Food Tech

Name:

Date:

📚 Part 1: Multiple Choice (Knowledge)

Success criteria: I can define hydration, explain its role in dough and cooked foods, and identify factors that affect water activity.

Differentiation: Provide a glossary for students who need language support; allow verbal answers for EAL learners.

Extension: Research a commercial product and list how manufacturers control hydration for shelf life.

1. What does "hydration" usually refer to in bread and dough recipes?

The temperature of the water used

The percentage of water relative to flour weight

The colour change during baking

2. Which statement about water activity (aw) is correct?

Higher aw usually increases microbial spoilage risk

aw is the same as total moisture content

Lower aw always makes food taste sweeter

3. Which of these increases gluten development in wheat dough?

Decreasing hydration percentage

Increasing hydration percentage and mixing time

Using cold water only

4. Check all that apply: Methods to reduce water activity and extend shelf life include:

Adding sugar or salt

Drying or dehydration

Increasing free water in the product

✏️ Part 2: Short Answers & Calculations (Application)

Success criteria: I can calculate hydration % for recipes, predict how changing hydration alters texture, and propose simple tests to measure effects.

Differentiation: Provide a step-by-step formula sheet; allow calculators and extra time for calculations.

Extension: Design a trial comparing three hydration levels and predict results using scientific method headings.

5. Calculate hydration: A recipe uses 600 g flour and 420 g water. What is the hydration percentage? Show working.

6. You want to change the recipe above to 75% hydration. How much water (g) do you need for 600 g flour?

7. In one short sentence, explain how increasing hydration affects crumb (texture) in bread.

8. Describe one simple classroom test to compare hydration levels (include one variable to change and one outcome to measure).

🔬 Part 3: Practical & Reflection

Success criteria: I can follow safe food handling, observe differences between samples, and record results clearly.

Differentiation: Pair students heterogeneously for practicals; provide visual checklists and short task cards for each role.

Extension: For advanced learners: plan statistical analysis (e.g. mean loaf volume, standard deviation) from repeated trials.

9. Practical task (teacher-led): Make three small dough samples at 60%, 70% and 80% hydration. Tick the safety steps you will follow:

Wash hands and tie back hair

Use the same flour weight for each sample

Measure oven moisture by eye only

10. Observation and reflection: Sketch expected crumb structure for the lowest and highest hydration doughs and write one sentence comparing them.

11. Extension challenge (write a brief plan): Propose one controlled experiment to test how hydration affects loaf volume. Include: independent variable, dependent variable, one control, and one method of measurement.