Test Your Knowledge On Easy Science

The correct answer is "Atmospheric Layer Acts As A Filter Against Incoming Ultraviolet Radiation." The ozone layer is a region in the Earth's stratosphere that contains a high concentration of ozone molecules. It acts as a protective shield against harmful ultraviolet (UV) radiation from the sun. UV radiation can cause various health issues, including skin cancer and cataracts. The ozone layer absorbs and filters out a significant amount of UV radiation, preventing it from reaching the Earth's surface. This definition accurately describes the role and function of the ozone layer.

The term "rainbow" is best defined as a luminous arc featuring all colors of the visible light spectrum. A rainbow is a natural phenomenon that occurs when sunlight is refracted, or bent, by water droplets in the air, creating a spectrum of colors. It is a beautiful and colorful arc that can be seen in the sky, usually after rain showers. The colors of the rainbow, in order, are red, orange, yellow, green, blue, indigo, and violet.

The correct answer is "Layer Of The Atmosphere Between The Troposphere And The Mesosphere." The stratosphere is a layer of the Earth's atmosphere that is located above the troposphere and below the mesosphere. It is characterized by a stable temperature profile, with temperatures increasing with altitude due to the presence of the ozone layer. The stratosphere plays a crucial role in protecting life on Earth by absorbing most of the Sun's harmful ultraviolet radiation.

Renewable energy refers to resources that can be replenished naturally and are not depleted with use. This includes sources such as solar, wind, geothermal, hydro, and wood. These resources are considered renewable because they are continuously available and can be used to generate energy without causing harm to the environment.

The term "ohm" is a unit of measurement used to quantify electrical resistance. It represents the amount of resistance that a material or device offers to the flow of electric current. The higher the value in ohms, the greater the resistance. This measurement is essential in understanding and designing electrical circuits, as it helps determine the behavior of current flow and the efficiency of electrical devices.

A hurricane is best defined as a tropical cyclone with sustained winds of 74 miles per hour. This is the correct answer because a hurricane is a specific type of tropical cyclone that is characterized by its wind speed. A tropical cyclone becomes a hurricane when its sustained winds reach or exceed 74 miles per hour. Therefore, this option accurately describes the definition of a hurricane.

The term "prevailing wind" refers to a wind that blows from one direction more frequently than any other. This means that in a particular region, there is a dominant wind direction that occurs more often than any other wind direction. It is an important concept in meteorology and is used to understand and predict weather patterns in a specific area.

The term "radar" is best defined as an acronym for Radio Detection And Ranging. Radar is a technology that uses radio waves to detect and locate objects, measure their distance and speed, and generate images of the objects. It is commonly used in various applications such as weather forecasting, air traffic control, and military surveillance.

Sand is best defined as loose particles of hard, broken rock or minerals. Sand is a granular material composed of small rock fragments or mineral grains. It is typically found on beaches, deserts, and riverbeds, and it is commonly used in construction and landscaping. The other options, such as large group aquatic plants, planets which have solid rocky surfaces, and a device that breaks light into its composite wavelength spectrum, do not accurately define the term "sand".

The term "rain forest" refers to a forest that grows in an area with heavy annual precipitation. This type of forest is characterized by high levels of rainfall, which supports a diverse range of plant and animal species. The term does not refer to the study of the body's structure, the smallest blood vessels, or the outermost covering of trees and plants.

The term "rad" is a unit of measure used to quantify the amount of absorbed radiation. It is commonly used in the field of radiology and radiation therapy to assess the amount of radiation exposure or dosage received by a person or object. The unit helps in understanding the potential health effects and determining appropriate safety measures in situations involving radiation.

A rip current is a strong surface water movement that flows from the shore out to sea. It is a narrow, fast-moving channel of water that can pull swimmers away from the shore. Rip currents are typically short-lived and can be dangerous for swimmers who are caught in them.

pH is a measure of the relative acidity or alkalinity of a substance. It indicates the concentration of hydrogen ions in a solution. A pH value below 7 indicates acidity, while a pH value above 7 indicates alkalinity. It is an important concept in chemistry and biology as it helps determine the acidity or alkalinity of substances such as water, soil, and bodily fluids. The pH scale ranges from 0 to 14, with 7 being neutral.

A photocell is a device that converts light energy into electrical energy. It is commonly used in various applications such as light sensors, solar panels, and automatic doors. When light falls on the photocell, it creates a flow of electrons, generating an electric current. This current can then be utilized for different purposes. Therefore, the best definition of a photocell is a device that makes current from light.

Ozone is best defined as a nearly colorless gas and a form of oxygen. Ozone is a molecule made up of three oxygen atoms (O3) and is pale blue in color. It is formed when oxygen molecules (O2) are broken apart by ultraviolet radiation from the sun. Ozone is found in the Earth's atmosphere, particularly in the ozone layer, where it plays a crucial role in absorbing harmful ultraviolet radiation. It also has various industrial and medical applications due to its strong oxidizing properties.