Size Of Specimens
Muhtasari
A drawing of a cell might be the size of your hand, yet the real cell is far too small to see. How do biologists describe these sizes accurately? They use magnification: the number of times bigger the image is than the real object. One simple formula links the three quantities, and rearranging it lets you find any one from the other two.
In this lesson you will learn and use the magnification formula, work carefully with units in millimetres, and, at Extended level, convert between millimetres and micrometres so you can handle the tiny sizes of cells and organelles with confidence.
Malengo
- [Core] State and use the formula: magnification = image size / actual size
- [Core] Calculate magnification and size of biological specimens using millimetres as units
- [Supplement] Convert measurements between millimetres (mm) and micrometres (μm)
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Hongera kwa kukamilisha somo la Size Of Specimens. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- To calculate the magnification of a drawing, which division do you carry out? A. real size divided by drawing size B. drawing size divided by real size C. drawing size divided by eyepiece value D. real size divided by objective value Answer: B
- A drawing is 50 mm wide; the real object is 0.5 mm wide. The magnification is: A. x10 B. x25 C. x100 D. x500 Answer: C
- How many micrometres are there in 1 millimetre? A. 10 B. 100 C. 1000 D. 1000000 Answer: C
- An image is x200 and 40 mm wide. The actual size is: A. 0.2 mm B. 0.5 mm C. 5 mm D. 8000 mm Answer: A
- Magnification is measured in: A. millimetres B. micrometres C. no units D. centimetres Answer: C
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Vitabu Vinavyopendekezwa
Jifunze zaidi kutoka vyanzo huria
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Sehemu ya kitabu
Measurements
Explain the process of measurement
"Chemistry: Measurements" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/chemistry/pages/1-4-measurements. Access for free at https://openstax.org/books/chemistry/pages/1-introduction
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