Natural sciences
Matter, measuring and reactions
Educator section
Memorandum
- The inside diameter is the diameter of the cylinder on the inside. So that one can determine how much contents it can take, for instance.
- The outside diameter is the diameter of the cylinder on the outside. So that one can determine how much space it will occupy.
- Circumference of the can's curved surface: Take thread and wrap it around the can. Place the thread on a ruler and measure its length.
- The circumference is 20,5 cm.
- Nail: 5 cm (estimate); 4 cm (reading)
- Measuring-cylinder: 6 cm (estimate); 5,5 cm (reading)
Leaner section
Content
Activity: to measure the diameter and circumference of a round object [lo 1.2]
The curved surface of the cylinder is known as the convex surface of the cylinder.
- Think of a strategy for measuring the circumference of the convex surface of a cylinder. Use a 340 ml cold drink can as your example.
This is how we measure the convex surface of the tin:
We first ...
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- Measure the diameters of the following objects:
Object | Estimation | Reading |
Nail (external diameter) | _________________ | _________________ |
Measuring cylinder (internal diameter) | _________________ | _________________ |
Assessment
Learning Outcome 1: The learner will be able to act confidently on curiosity about natural phenomena, and to investigate relationships and solve problems in scientific, technological and environmental contexts.
Assessment Standard 1.2: We know this when the learner conducts investigations and collects data: organises and uses apparatus/equipment or sources to gain and record information.