Science 9 Quiz

The symbol shown represents Compressed Gas which indicates that the substance inside is stored under high pressure. Flammable Material, Biological Hazard, and Corrosive Substance are common hazardous symbols as well, but they each represent different types of dangers.

Compressed gas is stored in a high-pressure container and can be in the form of gases such as helium, oxygen, and Acetylene. Nitrogen, propane, and carbon dioxide are not considered compressed gases in this context.

The symbol represents flammable and combustible material, indicating the potential fire hazard associated with the substance.

Flammable liquids are substances that ignite easily and burn rapidly. Water, milk, and vegetable oil are not considered flammable liquids because they do not ignite easily.

The symbol represents an oxidizing material, which means it can react with other substances by removing electrons, leading to combustion or fire hazards. It is important to handle such materials with caution to prevent accidents.

Disinfectants are agents that destroy or inactivate bacteria, viruses, and other harmful microorganisms. Bleach, chlorine, and ozone are common disinfectants that are effective in killing germs and ensuring cleanliness. Vinegar, water, and soap are not considered disinfectants as they do not have the same level of antimicrobial properties.

The biohazard symbol is commonly used to indicate the presence of dangerous biological materials. It is not the same as the radiation, flammable, or corrosive material symbols, each of which represent different types of hazards.

Toxic substances are chemicals that can cause harm or even death when ingested, inhaled, or absorbed through the skin. Water, sugar, and oxygen are essential for life and are not considered toxic substances.

The symbol shown represents poisonous material causing other toxic effects, not recyclable, non-toxic, or biohazard material.

The correct answer lists harmful substances, while the incorrect answers are harmless or essential substances.

The symbol depicted is commonly used to indicate biohazardous infectious material, typically found in settings such as laboratories or medical facilities.

The correct answer includes examples of infectious diseases caused by bacteria (anthrax), viruses, and the hepatitis virus. Malaria and typhoid fever are also infectious diseases, but they were not included in the correct answer. Diabetes, on the other hand, is a metabolic disorder and not an infectious disease.

The question asks for examples of hazardous substances, which are chlorine gas, murriatic acid, and fluorine. Water, salt, and sugar are not considered hazardous substances in normal circumstances.

The symbol represents a warning for dangerously reactive materials which may explosively react with water, air, or other substances.

The question asks for examples of substances, which are ether, calcium carbide, and ozone. Water, nitrogen, and sodium chloride are compounds, not substances. Iron, carbon dioxide, and sulfuric acid are also compounds. Methane, oxygen, and ammonia are gases, not substances in general.

When chemicals get into your eyes, it is important to wash them for at least 15 minutes to ensure thorough flushing and removal of the irritants.

The correct answer highlights the distinction between immediate and delayed reactions to toxic effects, while the incorrect answers provide alternative misconceptions in order to challenge test-takers' understanding.

Flammable substances are those that can easily ignite and burn, while oxidizing substances provide oxygen to help other materials burn. Understanding the difference between the two is crucial for fire safety and hazard management.