Life Processes 4 Plants & Animals 4.6 Cells

Sc 2: Life Processes

4 Plants

4.6 Cells

P.O.S.

Key Stage 1 Sc 1: 1,2f

Key Stage 2 Sc 1: 1b,2e, 2f

Key Stage 3 Sc 2: 1b,1e

LEARNING OBJECTIVES

  • Is able to use a magnifier
  • Knows that magnifiers can make objects larger and more detailed.
  • Knows some everyday uses of magnifiers
  • Can begin to explain why it is helpful to make things look bigger
  • Know that animals and plants are made of cells.
  • Can name some simple cell parts
  • Know that plant and animal cells are similar in many respects
  • Is able to use a microscope - possibly with help.

ICT

  • CD Roms
  • Intel microscope
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LINKS

Art /

VOCABULARY

Cell, microscope, magnification, magnifying glass/hand lens, magnifiers, plant, animal, nucleus, cell wall, cytoplasm, cell membrane

ACTIVITIES

  • Allow children to explore with magnifiers
  • Discuss with children when they have previously used magnifiers
  • Look at lots of objects using magnifiers and then the microscope on low power.
  • Make finger prints and look at with a magnifier
  • Look at pond water samples.
  • Look at moss dry and then after water is added.
  • Look at filter paper to see holes or fabric to see threads.
  • Discuss and look for everyday uses for magnifiers e.g removing splinters, looking at small print, looking at finger prints, threading needles
  • Make simple slides using sellotape and a piece of card.

Fold sellotape over to seal in object

  • Observe drops of saturated solutions as water evaporates. When and where do any crystals appear?
  • Examine letters and newsprint – which way round are they?
  • Use the INTEL microscope to take timelapse pictures of mould growing.
  • Examine prepared slides of cells using bioviewers, hand lenses, digital microscope.
  • Make slides of onion cells/animal cells. Draw what you see.
  • Make a model onion/leaf cell/animal cell (2D).
  • Make a 3D model of a cell (Small plastic bags filled with cellulose paste to represent cytoplasm, suitable objects to represent the nucleus – plant cells can also be made with the bags are squeezed into boxes).
  • Ask pupils to identify how plant and animal cells are different.
  • Label parts of cell: cytoplasm, nucleus, cell wall, cell membrane.
  • Make model cells with coloured playdough and cut a cross section
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RESOURCES

  • Microscopes
  • Prepared slides
  • Boivewers
  • Photographs
  • Digital Microscope (computer)
  • Iodine solution
  • Slides/cover slips
  • Home made playdough
  • Saturated solutions e.g salt, sugar, alum
  • Finger printing ink
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POINTS TO NOTE

  • Microscopes can be difficult to focus and it might be better to use those recommended by Royal Microscopical Society for Primary Pupils.
  • Digital (computer) microscope may be easier to use and ensure that all see the same.
  • Use cellulose paste because wallpaper paste contains fungicide
  • It is important that the magnification isn’t too large or pupils lose the sense of what they are seeing.
  • When using a magnifying glass keep it close to your eye and move the specimen away until it is focussed.

OWN ACTIVITIES

POSSIBLE INVESTIGATIONS

Compare finger- prints using different media? What makes the clearest prints?

Name:

Date Record Began:

Outcomes: NC Level 1  NC Level 4

1 /
  • Can use a hand lens or magnifying glass

1+ /
  • Can tell you that a hand lens makes things look bigger

  • Can describe some things that they an see through the hand lens

2 /
  • Can make a simple drawing of what they see with a hand lens

  • Can label features seen with a magnifier that are also apparent to the naked eye

  • Can describe simple differences between what they see with a hand lens and naked eye

2+ /
  • Can give an example of when it is useful to use a magnifier

3 /
  • Can make a more detailed drawing of what they see with a hand lens or microscope

  • Knows that cells are too small to see with eyes alone

  • Can use a light microscope that has been set up by an adult

3+ /
  • Knows that plants and animals are made of tiny building blocks called cells

  • Can show you where to put the slide or object on a microscope and where the focusing knob is

4 /
  • Can name some simple cell parts with prompting

  • Can focus the microscope on low power

  • Can label or annotate features of a drawing that are only apparent when magnified