Jan Exam Practice questions

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Jan Exam Practice questions

• 1. List the main kingdoms of living organisms.
• Archaebacteria Eubacteria Fungi Protista
  animal plant
• 2. Describe and explain the particle theory.
• As you increase energy (heat) you increase the
  speed and movement of particles.
• There are 3 states of matter (solid, liquid, gas)
  
• 3. What are acids and bases? How do you identify
  them?
• Acids have a pH less than 7 bases have a
  pH more than 7 and neutral substances have a pH
  equal to 7. You can use litmus paper to identify
  acids, bases, and neutral substances.
• Ex. If red litmus paper stays red and blue litmus
  paper turns red then you have an acid.
• 4. What is the difference between an observation
  and an inference?
• Observation You are stating the facts (based on
  one or more of your five senses)
• Inference You are making a scientific guess
  based on your observations
• and non characteristic properties?

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• 5. Name 2 physical and 2 chemical changes.
• Physical cutting wood melting ice
• Chemical burning wood apple rotting
• 6. What are the different kinds of mixtures? What
  is a solution? What is a pure substance?
• Heterogeneous (see the various components of the
  mixture) and homogeneous (one phase --- cant see
  the components)
• A solution is a homogenous mixture (made up of a
  solute and solvent)
• A pure substance cannot be separated into other
  kinds of matter by any physical or chemical
  process

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• 7. What is a food chain? Give an example and list
  the various components to said food chain.
• The energy consumption relationship between
  various organisms living in the same ecosystem.
• Producer consumer decomposer
• Plants (producer) grasshopper (consumer 1st)
  mouse (consumer 2nd) snake (consumer 3rd) owl
  (consumer 4th) mushrooms (decomposer)
• 8. What is the difference between characteristic
  and non-characteristic properties?
• Characteristic Helps you identify the
  substance unique property (i.e. Density)
• Non-characteristic Property common to many
  substances (i.e. Colour)