This is the transfer of energy from a high-temperature body to a lower-temperature one. - Heat, It is also described as energy in transit since it only occurs when there is a difference in temperature between two systems - Heat, This is commonly described as the hotness or coldness of an object. - Temperature, it is defined as the average kinetic energy of the molecules in a system. - Temperature, True or False.Consider a pan filled with water at room temperature. Initially, the water molecules move slowly, but as the water is heated on a stove, some of the water molecules gain kinetic energy and move faster. These faster-moving molecules collide with other slow-moving water molecules and transfer some of their kinetic energy in the process. The process continues until the water reaches thermal equilibrium. This time, the average kinetic energy of the water in the bowl is now higher than when it is still at room temperature. - True, True or False. The process of transferring energy from one molecule to another holds true for all kinds of matter. - True, True or False. Solids are tightly packed; thus, their particles only vibrate in their own places - True, True or False. Gases move freely in a random motion mainly because of the significantly larger spaces between each molecule. - True, True or False. Liquids vibrate and slide past each other due to the slightly smaller distances between the molecules - True, True or False. Heat energy does not flow when the temperature between two objects or systems is not equal. - False (should be equal), True or False. Heat energy does not flow when the temperature between two objects or systems is equal. - True, True or False. Heat moves spontaneously from a higher temperature region to a lower one as long as a temperature difference occurs. - True, What molecules are the three pictures - solid, liquid, gas, The amount of heat energy transfer depends on three factors: - (1) The change in temperature, (2) The mass of the system, (3) The substance and phase of the substance, What are the 3 types of Heat Energy Transfer - Conducting, convection, radiation, is the transfer of heat that requires direct contact between the materials - Conduction, It is most effective in solids, where the molecules are tightly packed and, thus, easier to transfer kinetic energy from one molecule to another. - conduction, This is the transfer of heat due to the movement of large fluid masses caused by the difference in densities - Convection, Less dense and warmer fluid mass rises while denser and colder fluid mass sinks. - Convection, This is the transfer of heat through electromagnetic waves. It does not require a medium, and the rate at which it transfers energy largely depends on the body's color. - Radiation, The light that is visible to the human eye and responsible for our sense of sight - visible light, The scientific study of light and how it interacts with different objects. - optics, The study of refraction, reflection, absorption, and transmission of light. - optics, True or False. Light travels in straight lines and is a form of energy. - True, True or False. Light travels much faster (a million times faster!) than sound. - True, True or False. We see things because they reflect light into our eyes. - True, What is formed when light is blocked by an object. - Shadow, What is when waves speed up or slow down due to traveling in a different medium. - refraction, Refers to the bouncing back of light when it hits an object - reflection, Light occurs when an object does not reflect or transmit the light. - absorption, Refers to the passing of light through some materials. - Transmission of light, What are the 3 transmission of light - transparent, translucent, opaque, Objects allow all the light to pass through them. - transparent, Allow some light to pass through them. This means that we can partially see through them - translucent, Object do not allow any light to pass through them. This means that we cannot see through them at all. - opaque,

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