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WorksheetsGrade 9 Science Summative Test
Total questions: 20
Worksheet time: 10mins
What is the main function of the respiratory system?
Breaks down food
Circulates blood
Delivers oxygen and removes carbon dioxide
Produces hormones
Which organ is primarily responsible for gas exchange?
Heart
Kidney
Lungs
Brain
Which structure allows air to pass from the throat to the lungs?
Aorta
Trachea
Diaphragm
Esophagus
Where in the lungs does the exchange of oxygen and carbon dioxide take place?
Bronchi
Diaphragm
Alveoli
Trachea
What muscle helps the lungs expand and contract during breathing?
Biceps
Trapezius
Diaphragm
Sternum
What is the major function of the circulatory system?
Transport nutrients and oxygen
Control movement
Filter waste
Store energy
Which organ pumps blood throughout the body?
Brain
Lungs
Heart
Liver
What blood vessels carry oxygenated blood away from the heart?
Veins
Arteries
Capillaries
Bronchi
Which blood component fights against infection?
Red blood cells
Platelets
White blood cells
Plasma
Which blood cells carry oxygen?
Platelets
White blood cells
Red blood cells
Plasma
Which of the following is a respiratory disorder caused by allergens, smoke, or pollution?
Hypertension
Anemia
Asthma
Stroke
What lifestyle habit increases the risk of respiratory diseases like bronchitis?
Eating vegetables
Drinking milk
Smoking
Sleeping early
Which lifestyle disease affects the blood vessels due to high-fat diet and lack of exercise?
Asthma
Hypertension
Tuberculosis
Diabetes
What condition happens when blood flow to the heart is blocked?
Heart attack
Stroke
Anemia
Asthma
Which of the following is NOT a healthy lifestyle habit?
Smoking
Exercise
Eating fruits
Drinking water
The muscular organ that pumps blood throughout the body:
(a)
The dome-shaped muscle that aids in breathing:
(a)
A long-term inflammatory disease of the airways that causes breathing difficulty:
(a)
Disease caused by the buildup of fat in the blood vessels:
(a)
One way to prevent respiratory and circulatory diseases:
(a)
