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Third Grade (Grade 3) Respiration, Digestion, and Excretion Questions

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Grade 3 Respiration, Digestion, and Excretion
The                 are the organs that help us breathe in air.
  1. kidneys
  2. lungs
  3. intestines
Grade 3 Respiration, Digestion, and Excretion
The two types of ways that animals can breathe are by using their
  1. lungs or kidneys
  2. lungs or gills
  3. gills or eyes
  4. lungs or legs
Grade 3 Respiration, Digestion, and Excretion
We get energy from which of the following?
  1. running
  2. sitting quietly
  3. the foods we eat
Grade 3 Respiration, Digestion, and Excretion
The respiratory system helps the body to take in          oxygen         and give off                  carbon dioxide                 .
Grade 3 Respiration, Digestion, and Excretion
When you exercise, your body needs more               , so you breathe faster.
  1. oxygen
  2. water
  3. carbon dioxide
  4. speed
Grade 3 Respiration, Digestion, and Excretion
The         Lungs        are the main organs of the respiratory system.
Grade 3 Respiration, Digestion, and Excretion
Your           Stomach           is a bag made up of muscles that churns food.
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