Science 8 - Quiz bee - Difficult Round

Which of the following parts of a heart is responsible for preventing backward flow of blood in the heart?

• A. vein

• B. artery

• C. chamber

• D. valve

Which of the following digestive processes make use of nutrients to produce complex substances such as fat, proteins, etc.?

• A. Ingestion

• B. Propulsion

• C. Assimilation

• D. Elimination

What are the different magnifications of a compound microscope?

• A. 4x, 10x, 40x, 100x

• B. 40x, 100x, 400x, 1000x

• C. 5x, 20x, 50x, 100x

• D. 400x, 600x, 800x, 1000x

What digestive disease is caused by a certain bacteria called H. pylori that sore the stomach lining, small intestine or esophagus?

• A. Diarrhea

• B. Constipation

• C. Ulcer

• D. Colon cancer

What respiratory disease is caused by viral infection that affects your alveoli?

• A. Covid-19

• B. Asthma

• C. Pneumonia

• D. Tuberculosis