M3 Science Quiz- Understanding The Water Cycle

Evaporation is the process of liquid water changing into water vapor, not the other way around. When water is heated or exposed to air, it gains energy and molecules at the surface gain enough energy to break free from the liquid phase and become water vapor. This process is known as evaporation. On the other hand, condensation is the process of water vapor changing back into liquid water when it loses energy and cools down. Therefore, the statement "Evaporation is the process of water vapor changing into liquid water" is false. However, the statement "Evaporation is the process of liquid water changing into water vapor" is true.

About 70% of Earth is covered by water, not 25%. This makes the statement "About 25% of Earth is covered by water" false. However, it is true that Earth is indeed covered by water, just not to the extent of 25%.

This question is asking whether all living things need water to survive. The correct answer is True, as water is essential for the survival of most living organisms. However, there are some exceptions, such as certain types of bacteria and organisms that can survive in extreme environments without water. Therefore, the answer is also False in some cases.

Lakes are indeed examples of standing fresh water bodies. They are large inland bodies of water that are surrounded by land and are typically filled with fresh water. However, not all lakes contain fresh water. Some lakes, known as saltwater lakes or saline lakes, contain high levels of salt and other minerals, making the water saline instead of fresh. Therefore, while most lakes are examples of standing fresh water, there are exceptions to this rule.

Groundwater is the correct answer because it refers to the water that is present beneath the Earth's surface in the cracks and spaces in soil, sand, and rock. It is stored in aquifers and can be accessed through wells and springs. Groundwater is an important source of drinking water and irrigation for many regions.

Water can exist as a solid (ice), liquid (water), and a gas (water vapor). When water is heated, it undergoes a phase change from liquid to gas, a process known as evaporation. Therefore, the correct answer is gas.

Freezing is the process of liquid water changing into ice. When water reaches its freezing point, the molecules slow down and come closer together, forming a solid structure. This transformation occurs due to the removal of heat energy from the water, causing it to solidify into ice.

The correct answer is saltwater because the oceans are primarily composed of water that contains a high concentration of dissolved salts, such as sodium chloride. This saltwater is formed through various processes, including the erosion of rocks, volcanic activity, and the movement of minerals from land to the ocean. The salinity of the oceans is crucial for maintaining the balance of marine ecosystems and regulating global climate patterns.

Water in puddles eventually disappears due to evaporation. Evaporation is the process by which water molecules at the surface of the puddle gain enough energy to escape into the air as water vapor. As the water molecules continue to evaporate, the puddle gradually dries up and disappears. This process is accelerated by factors such as heat, wind, and low humidity. Freezing, precipitation, and condensation do not directly cause the water in puddles to disappear.

Water is made up of two atoms of hydrogen and one atom of oxygen. This is represented by the chemical formula H2O. Oxygen is an essential component of water and is necessary for its formation. Nitrogen, helium, and iron are not part of the composition of water.

Fresh water refers to water that has a very low concentration of dissolved salts and minerals. It is found in sources such as rivers, lakes, and groundwater. The fact that only 3% of the Earth's water is in the form of fresh water highlights its scarcity and importance. The majority of the Earth's water is in the form of saltwater in the oceans, while a smaller percentage exists as water vapor in the atmosphere and as snow in colder regions.

False. The chemical formula for water is H2O, not HN0.

The process described in the question refers to the change of water vapor into liquid water. This process is known as condensation. Precipitation, on the other hand, refers to the process in which water falls from the atmosphere to the Earth's surface in the form of rain, snow, sleet, or hail. Evaporation is the process of water changing from a liquid state to a gaseous state, and sublimation refers to the direct change of water from a solid (ice) to a gas (water vapor) without passing through the liquid state.