Testing Fabric Absorption: A Fair Test Investigation
Have you ever wondered why bath towels are usually made of cotton while rain jackets are made of smooth nylon? Different fabrics interact with liquids in different ways. In this scientific investigation, you will test how much water three different fabric swatches can absorb. To make your test fair, you must keep every condition identical except for the type of fabric being tested.
Materials Needed
- Three equal-sized fabric squares (exactly 4 inches by 4 inches): one cotton flannel, one polyester, and one wool blend
- A graduated cylinder (measuring in milliliters)
- Room-temperature water
- Three identical shallow plastic dishes
- A pair of plastic tweezers or tongs
- A digital stopwatch or classroom timer
- A ruler with metric markings
- A data recording sheet and a pencil
- Paper towels for safe cleanup
Safety Guidelines
- Walk carefully when carrying water to prevent spills on the classroom floor.
- Immediately wipe up any drips with paper towels so nobody slips.
- Handle all plastic containers gently to avoid splashing.
Step-by-Step Procedure
- investigation:
- A careful scientific study or test designed to answer a question.
- swatches:
- Small sample pieces of cloth or fabric used for testing.
- graduated cylinder:
- A tall, narrow container marked with lines used to measure liquid volume accurately.
- submerge:
- To cover something completely with water or another liquid.
- meniscus:
- The curved upper surface of a liquid resting inside a narrow tube.
- volume:
- The amount of space that a liquid or object fills.
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Main Idea
Identify the central idea and explain how important details develop it.
Context Clues
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Summarize
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Purpose
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Structure
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Writing Prompts
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Preview questions from this passageShowHide
- 1What is the main purpose of this scientific investigation?
- 2Why must each shallow dish start with exactly 50 milliliters of water?
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About this how-to / procedural passage for 4th Grade
“Testing Fabric Absorption: A Fair Test Investigation” is a how-to / procedural reading passage about fabric water absorption experiment, written for 4th Grade. It takes about 5 minutes to read (680 words) and comes with an interactive quiz and a printable worksheet with comprehension questions and an answer key.