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SCIENCE 9_Q1_PERIODIC TEST

Quiz by CID Marikina

Grade 9
Science
Philippines Curriculum: Grades K-10 (MELC)

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50 questions
Show answers
  • Q1

    Study the illustration below. Which arrow points to the alveoli?

    Question Image
    Arrow 4 points to the alveoli.

    Alveoli filter air, thus it is arrow 1.

    Alveoli are tiny sacs of air and the site of gas exchange. It is not arrow 3.
    It is the end part of the bronchioles pointed by arrow 4 where the exchange of gas occurs.
    30s
    S9LT-la-b-26
  • Q2

    The lungs are the major organs of the respiratory system. How does it function?

    It helps us breathe oxygen.

    The lungs are the organ that pumps blood in the body.

    It is the organ that contains the air sacs and helps in the delivery of oxygen.
    The lungs contain air sacs surrounded by capillaries that help in the oxygenation of the blood.
    30s
    S9LT-la-b-26
  • Q3

    When you inhale and exhale, you notice that there is movement in your chest cavity.  Describe the role of the diaphragm in these processes.

    The diaphragm is a muscle that controls breathing.
    The diaphragm contracts during inhalation and relaxes upon exhalation.
    The diaphragm contracts creating a vacuum that pulls air into the lungs.

    During the inhalation, the diaphragm moves inward and outward that makes chest movement.

    30s
    S9LT-la-b-26
  • Q4

    The circulatory system is the body’s transport system.  Identify the organs that help transport nutrients and gases in the body.

    Question Image
    I, it is a blood vessel.

    III is a tube that serves as passageway of nutrients.

    I and II deliver nutrients in the different organs of body
    I, II and IV because they are part of circulatory system
    30s
    S9LT-la-b-26
  • Q5

    The heart is the busiest organ in our body.  It is responsible for pumping blood.  How does the heart pump blood?

    The chambers of the heart pumps blood.

    The blood is pumped by the capillaries of the heart

    When the heart contracts, the ventricles will pump blood to the lungs and the body.
    The upper chamber of the heart collects blood and the lower chamber pumps blood.
    30s
    S9LT-la-b-26
  • Q6

    Which describes BEST the pulmonary circulation?

    It refers to the flow of blood from heart to lungs and vice versa.
    The deoxygenated blood flow from heart to lungs to regain oxygen.
    The oxygenated blood from the lungs flows back to the heart through pulmonary veins.

    The blood from different parts of the body flows back to the heart then gain oxygen in the lungs.

    30s
    S9LT-la-b-26
  • Q7

    The respiratory and circulatory systems work together to transport oxygen and carbon dioxide in the body. How do the lungs and blood work together in the exchange of gases in the body?

    The lungs bring oxygen to the body through inhaling.

    Blood brings carbon dioxide to the body cells through inhaling.

    In gas exchange, the blood that enters the lungs unloads carbon dioxide and picks up oxygen.
    The lungs are the site of the exchange of gases and the blood transports oxygen and nutrients inside the body.
    30s
    S9LT-la-b-26
  • Q8

    Cigarette smoking is a hard habit to break.  Why can cigarettes cause addiction and heart problems to persons who smoke?

    It contains nicotine.

    Cigarette smoke contains caffeine.

    Cigarette smoke contains nicotine that led to heart problems.
    It has a highly addictive substance and increases the blood pressure of smokers.
    30s
    S9LT -lc -27
  • Q9

    Study the pictures of a simulation of cigarette smoking. What can you infer from the result of this experiment?

    Question Image
    The cigarette smoke formed a thin layer of tar in the cotton.

    Nothing happens to the cotton balls, so it is ok to smoke cigarettes

    This experiment the deposition of tar in the cotton which occurs also in the lungs of a smoker.
    Tar in cigarettes sticks to the cotton balls similarly to the arterial walls of the different parts of the body.
    30s
    S9LT -lc -27
  • Q10

    Chronic Obstructive Pulmonary Disease (COPD) can be obtained from long-term cigarette smoking.  How will you detect if you have COPD?

    Persistent chesty cough
    Persistent chesty cough and difficulty in breathing
    Difficulty in breathing due to the damaged lining of the lungs

    The difficulty of sleeping is due to the harmful chemicals in cigarette.

    30s
    S9LT -lc -27
  • Q11

    Coronary artery disease (CAD) is the most common type of heart disease.  The problem starts when a waxy substance called plaque builds up inside the arteries that supply blood to the heart muscle.  How can a person know if he/she has CAD?

    Experiencing chest pain, weakness, light-headedness, nausea (feeling sick to your stomach), or a cold sweat

    Discomfort in the stomach due to the high fatty substances deposited in this organ

    Heart attack caused by plaque build-up in the walls of the arteries
    Chest pain or discomfort (angina)
    30s
    S9LT -lc -27
  • Q12

    You observed that your older brother frequently smoke cigarettes and eats salty and fatty foods most of the time. What is likely to happen if the person does not change his lifestyle?

    The person will get chronic obstructive pulmonary disease.

    Respiratory and circulatory organs of the person will not be affected.

    Individuals will get lung cancer and hypertension due to long-term cigarette smoking and unhealthy diet.
    The organs of the individual will be blocked by the chemicals from cigarettes, and unsaturated fats block the blood vessels.
    30s
    S9LT -lc -27
  • Q13

    Atherosclerosis is a disease where the artery is blocked by fats, tar, and high blood pressure. How can we prevent atherosclerosis?

    Observe healthy lifestyle.

    Eat fatty food and drink alcoholic beverages

    Do not smoke, get enough sleep and have a balanced diet
    Avoid fatty food and alcoholic drinks to avoid blockage of blood vessels
    30s
    S9LT -lc -27
  • Q14

    The Department of Education is looking forward to mandatory face to face mode of reporting of students in school. How will you lessen the increasing number of cases?

    Wear a face mask, keep social distance, eat healthy foods and have enough sleep.
    Increase your immune system by taking vitamins and eating healthy foods.

    Observe health protocols in the crowded area only.

    Do simple exercises every day.
    30s
    S9LT -lc -27
  • Q15

    The DNA is an important molecule in a living organism because it contains the genetic information to produce proteins. What part of the DNA nucleotide gives the genetic information?

    Nitrogenous bases

    Phosphate and pentose sugar

    Purines and pyrimidines that form complimentary bases
    The nitrogenous bases such as adenine, guanine, cytosine, and thymine
    30s
    S9LT -Id -29

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