Grade 8 Science: Intake and Output
This worksheet focuses on the concepts of intake and output in biological systems, covering topics such as digestion, excretion, and the balance of substances within an organism.
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Intake and Output in Biological Systems
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Read each question carefully and provide your best answer. Some questions may require you to refer to the provided diagram.
1. Which of the following is the primary organ responsible for absorbing nutrients from digested food?
Stomach
Large Intestine
Small Intestine
Esophagus
2. Which of the following is considered an output product of cellular respiration?
Glucose
Oxygen
Carbon Dioxide
Water (as an intake)
3. The process of taking food into the body is called .
4. The kidneys are part of the system, responsible for filtering waste from the blood.
5. Describe the main function of the large intestine in terms of intake and output.
6. Photosynthesis is a process where plants take in carbon dioxide and release oxygen.
True
False
7. Refer to the diagram of the human digestive system below:
Identify two organs involved in the intake of food and two organs involved in the output of waste products.