Which substance is NOT a mixture.
A. Soil
B. Concrete
C. Soda
D. Gold
Which of those substances do you think is not a mixture? Which is only made up of one thing?
To determine which substance is not a mixture, we need to understand the definition of a mixture. A mixture is a combination of two or more substances that are not chemically combined. In other words, a mixture contains different components that can be physically separated.
Now, analyzing the options given:
A. Soil: Soil is generally composed of a combination of minerals, organic matter, water, and air. It is considered a mixture since it contains various components.
B. Concrete: Concrete is made by mixing cement, water, aggregate (such as sand and gravel), and sometimes additives. Therefore, concrete is also a mixture.
C. Soda: Soda is typically carbonated water mixed with various flavorings, sweeteners, and occasionally other additives. Therefore, soda is a mixture too.
D. Gold: Gold is an element in its purest form, composed of only gold atoms. It is not a mixture but a pure substance.
Based on this information, the substance that is NOT a mixture is D. Gold, as it is made up of only one element.