Test Questions with answer key- science 9.docx - UNIFIED EXAM IN SCIENCE 9 First Quarter Name School Grade Score Directions Read and understand

Test Questions with answer key- science 9.docx - UNIFIED...

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UNIFIED EXAM IN SCIENCE 9 First Quarter Name: _______________________________________________ Grade: ___________________ School: ______________________________________________ Score: ___________________ Directions: Read and understand carefully each of the following questions. Choose the best answer from choices A, B, C and D. Write the letter of your choice on the space provided before each number. _____1. What is the other term use to describe Respiratory system? A. It is a gas exchange system of the body C. Mechanism for blood flow B. Cardiovascular system only in plants D. Both A and B _____2. Which organ functions this way? A. Trachea B. Bronchi C. Bronchioles D. Alveoli _____3. What is a tiny bubble-like bunch of structure where gas exchange occur? A. Trachea B. Bronchi C. Bronchioles D. Alveoli _____4. What does the circulatory system distribute to the body as it works with the respiratory system? A. glucose B. carbon dioxide C. oxygen D. heat _____5. What happens to the diaphragm when a person breathes in or inhales? A. Relaxes B. goes down C. contracts D. goes upward _____6. What is released by the body as waste during respiration? A. Carbon dioxide B. Nutrients C. Oxygen D. Smoke _____7. What happens to the gases that the body can’t use? A. they are exhaled. B. circulates through the body and are disposed of later. C. they are changed into oxygen by the lungs. D. absorbed into the digestive system and used to create energy. _____8. Why is blood that flows from the lungs to the heart is bright red rather than dark red? A. oxygen makes it red C. gastric juice produce the red color of the blood B. carbon dioxide makes it red D. the lungs add a pigment to blood as it flows through them. _____9. What body structure protects the lungs from outside harm? A. cartilage B. tiny sacs C. the rib cage D. the diaphragm _____10. What type of blood vessels carries deoxygenated blood? A. arteries B. veins C. capillaries D. aorta This is a hollow tube that serves as passageway of air into the lungs. The nutrients obtained from the food during digestion are supplied by the circulatory system to the body. Rose exercise by inhaling and exhaling. Solid and liquid wastes are removed from the body through defecation and urination. When we breathe in, we inhale many gases, including oxygen.
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_____11. What is the correct order of how the air enters into the body? I. Air enters your lungs and then into the left part of your heart. II. Carbon dioxide leaves your body through the lungs when you exhale. III. Once the air reaches the cells, oxygen processes the nutrients to release energy. IV. Air is pumped by your heart into the bloodstream, all the way through your body. V. The blood delivers carbon dioxide into the right portion of your heart, from which it is pumped to the lungs. A. Carbon dioxide B. Nutrients C. Oxygen D. Smoke _____12. Which of the following statements is CORRECT? A. When we inhale, our diaphragm expands while our lungs contract. B. When we inhale, our diaphragm contracts while our lungs expand.
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