The highest level of scientific experiment is known as experimental, or randomized control. In this type, as the name implies, there is the greatest amount of control. There are at least two groups used in this type of scientific experiment. Each group is made up of subjects that resemble each other as close as possible, such as by age, gender, etc. Subjects can be human, animal or the environment.
Chemical changes can result from the combination of different substance through a reaction to give one or more different substances. Decomposition, the opposite of combination, involves the breakdown of a single substance into two or more different substances.
Chemical Properties are the characteristics of a substance that determine how it will react with other substances. Chemical properties is a characteristic of pure substance â¦ s that describes it's ability to change into different substances.he chemical property of a given element refers to the property that is used to characterize the reaction of the materials hence their identity.