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Demonstrating an eclipse of the moon
Use a flash light or a lighted candle in a darkened room to show the sun. Hold an 8 cm rubber ball in one hand to show the earth. Hold a 2-cm ball in the other hand to show the moon. Hold the ball demonstrating the earth in the beam of light from the flash light and observe the shadow cast by the earth. Next pass the smaller ball or moon at the back the earth into the shadow. The moon will be in eclipse while it passes by the earth's shadow.
Explain the Mechanics of Respiration The process of respiration can be well understood by studying the mechanism of respiration. This can be explained through a respiratory cy
List any three human activities that you think would lead to air pollution. The following three human activities would lead to air pollution: (i) Burning of fossil fuels such
Structure of Atoms Elements are pure substances. Elements are composed of a single kind of atom, as opposed to compounds which contain two or more kinds of atoms (see lesson 5).
Explain the Mucous Membrane This layer is lined by the epithelial cells. Parts of the tract which are subject to mechanical injury, the layer consists of stratified squamous ep
Explain the Dichromates or Mild Colour Blindness A dichromate individual possesses only two cone pigments. Lack of the red pigment, called protanopia, makes distinguishing of t
Explain Cholesterol - Constituents of Bile Cholesterol: Cholesterol is an extremely important compound, a constituent of most cell membranes and the precursor of bile acids and
What is ethics
How has the earth changed since it was formed? Ans) The earth has changed particularly since it was formed. Earth was a ball of rock that was strike and changed by loads of imp
Accidents in laboratories, by and large, occur due to unsafe work practice. The accidents may result in harm to someone and/or damage to equipment and premises. In this unit, we ha
Define the Adrenal Sex Hormone Secretion Regulated The secretion of adrenal androgens by the adrenal cortex is controlled by ACTH. In the discussion above, we have seen how a f
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