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January 29th, 2014

29/1/2014

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Making a slide
Plant cells can be seen using a light microscope.

You should be able to describe how to prepare a microscope slide of stained onion cells. Here is a typical method:

  1. Cut open an onion
  2. Use forceps to peel a thin layer ofepidermis from the inside
  3. Lay the layer of epidermis on a microscope slide
  4. Add a drop of iodine solution to the layer
  5. Carefully place a cover slip over the layer

The iodine solution stains starch in the cells blue-black, making the cell features easier to see.

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January 22nd, 2014

22/1/2014

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Today we learned about plant and animal cells and some differences between them.
We then used a light microscope to look at slides of cells.
Picture
Picture
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January 13th, 2014

13/1/2014

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The 7 characteristics of living things

Movement

All living things move in some way. This may be obvious, such as animals that are able to walk, or less obvious, such as plants that have parts that move to track the movement of the sun.

Respiration

Respiration is a chemical reaction that happens within cells to release energy from food.

Sensitivity

The ability to detect changes in the surrounding environment.

Growth

All living things grow.

Reproduction

The ability to reproduce and pass genetic information onto their offspring.

Excretion

Getting rid of waste.

Nutrition

The intake and use of nutrients. This occurs in very different ways in different kinds of living things.

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    Mr Roche

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