Quiz  /  Applied science Class 9 MCQ Questions With Answers

  • 1. 
    You should always rinse fruits and vegetables before you eat them.

  • True
  • False

  • 2. 
    What is the main function of the respiratory system?

  • to provide oxygen and remove carbon dioxide from the body
  • to break down food and absorb nutrients
  • to remove oxygen from the body and deliver carbon dioxide

  • 3. 
    Never use pesticides when children or pets are in the room.

  • True
  • False

  • 4. 
    What is tube that is also known as your wind pipe?

  • esophagus
  • trachea
  • bronchi

  • 5. 
    The organ that protects us from outside elements is the ________.

  • brain
  • small intestine
  • skin

  • 6. 
    Batteries should be stored in the sun.

  • True
  • False

  • 7. 
    What is bioaccumulation?

  • Sudden, rapid rise in population
  • Increasing birth rate
  • The build up of chemicals to toxic levels in animal bodies
  • Cumulative weight gain in animals due to overfeeding

  • 8. 
    The organ in our digestive system that allows the nutrients to enter our bloodstream is the ______.

  • small intestine
  • esophagus
  • mouth

  • 9. 
    Chemicals are not hazardous if properly used.

  • True
  • False

  • 10. 
    How can we manage our household waste effectively

  • Using biodegradable products/packaging
  • Recycling
  • Eat more raw foods
  • Both A & B

  • 11. 
    Select the most appropriate end to the sentence: A pollution indicator...

  • ... tells us exactly how much pollution is present
  • ... tells us about the amount of pollution present if it is in an environment
  • ... tells us about the amount of pollution present if it is missing from an environment
  • ... is always a living thing

  • 12. 
    What is eutrophication?

  • Algae overgrowth as a result of the overuse of fertiliser
  • A problem caused by untreated sewage
  • The build up of heavy metals in the food chain
  • The presence of smog due to air pollution

  • 13. 
    Liquid chemicals should be stored above dry chemicals.

  • True
  • False

  • 14. 
    In which ways can plastic waste cause harm to animals

  • Suffocation
  • Mistakenly eating it
  • Entanglement
  • All of above

  • 15. 
    Always combine the chemicals chlorine bleach and ammonia

  • True
  • False

  • 16. 
    What is the definition of 'sustainability'?

  • The ability to provide for our current needs whilst leaving enough resources for future generations
  • Recycling
  • Being 'green'
  • Reducing energy use

  • 17. 
    Which pollutant are lichens often sensitive to?

  • Carbon dioxide
  • Methane
  • Sulfur dioxide
  • Sulfur trioxide

  • 18. 
    Sulfur dioxide is the pollutant that causes __________

  • Global warming
  • Greenhouse effect
  • Melting polar icecaps
  • Acid rain

  • 19. 
    What is the biggest issue regarding the use of plastic?

  • They break down too easily
  • They give off toxic waste products
  • They are not biodegradable
  • Low rates of recycling

  • 20. 
    Bacteria clogging the pores on our faces is called __________.

  • acne
  • asthma
  • ulcers

  • 21. 
    Which of these are examples of habitats

  • Forest
  • River
  • Desert
  • All of above

  • 22. 
    Broken bones are called _______.

  • fractures
  • strains
  • tears

  • 23. 
    The __________________ system works with the respiratory system to provide our body with oxygen and get rid of CO2 (carbon dioxide).

  • digestive
  • circulatory
  • muscular

  • 24. 
    Which of these is a reason why a species may become endangered or extinct?

  • Habitat destruction
  • Not fast enough to run from predators
  • Migration
  • Breeding seasons changing

  • 25. 
    Being out in the sun too much can cause ________ cancer.

  • lung
  • skin
  • stomach

  • 26. 
    When you breathe, your lungs take in __________ and remove _________.

  • air/oxygen
  • carbon dioxide/waste
  • oxygen/carbon dioxide

  • 27. 
    Which of the following organs stores food?

  • Lung
  • Stomach
  • Brain

  • 28. 
    What are the main organs of the respiratory system that allow us to breathe and for gas exchange to happen?

  • diaphragm
  • trachea
  • lungs
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