Simple "all in one lesson" on one PPT with a practical task of preparing a microscope slide using an onion. Equipment needed: Onion – Knife – Cutting Tile – Staining liquid (Iodine) – Microscopes – Microscope slides – Cover Slips – Tweezers. Instructions of activities in the notes section of each slide.
Starter - 2 questions. Why is it useful to use a microscope to view an object?
Why can’t we just use a magnifying glass?
Main 1 - Light microscope. Slide 3 can be printed out for students to label the parts of a microscope or you can complete a back to board drawing with 2 students. Students discuss in pairs what they think each microscope part does.
Main 2 - Practical demo. I have not included a method sheet here as I like to complete the practical as a demonstration for the students to watch as they write their own method to the practical. There is an equipment list and very simple method on the last slide.
Extension - Students calculate total magnification from 3 given problems.
Plenary - Students look at 4 objects which have been magnified and guess what they are.
Objectives:
GOOD – USE a light microscope to observe a prepared slide
GREAT – EXPLAIN how to use a microscope to observe a cell
OUTSTANDING – CALCULATE magnification of a cell
Starter - 2 questions. Why is it useful to use a microscope to view an object?
Why can’t we just use a magnifying glass?
Main 1 - Light microscope. Slide 3 can be printed out for students to label the parts of a microscope or you can complete a back to board drawing with 2 students. Students discuss in pairs what they think each microscope part does.
Main 2 - Practical demo. I have not included a method sheet here as I like to complete the practical as a demonstration for the students to watch as they write their own method to the practical. There is an equipment list and very simple method on the last slide.
Extension - Students calculate total magnification from 3 given problems.
Plenary - Students look at 4 objects which have been magnified and guess what they are.
Objectives:
GOOD – USE a light microscope to observe a prepared slide
GREAT – EXPLAIN how to use a microscope to observe a cell
OUTSTANDING – CALCULATE magnification of a cell
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