Matter interactions apply unit 2, lesson 15
In unit 2, lesson 15, matter interactions refer to how different types of matter interact with each other. Here are some examples of matter interactions covered in this lesson:
1. Physical Changes: Matter can undergo physical changes, such as changes in shape, size, or state (solid, liquid, gas) without changing its chemical composition. For example, water freezing into ice is a physical change where the water molecules slow down and arrange themselves into a rigid structure.
2. Chemical Changes: Matter can also undergo chemical changes, where new substances are formed with different properties. This involves the breaking and forming of chemical bonds. For example, when iron rusts, it undergoes a chemical change as it reacts with oxygen in the presence of moisture to form iron oxide.
3. Mixtures: Matter can exist as mixtures, where two or more substances are physically combined but retain their individual properties. Mixtures can be homogeneous (uniform composition throughout) or heterogeneous (non-uniform composition). For example, a mixture of salt and water forms a homogeneous mixture, while a mixture of oil and water is heterogeneous.
4. Solutions: Solutions are a type of homogeneous mixture where one substance (solute) is uniformly dissolved in another substance (solvent). For example, salt dissolving in water forms a saltwater solution.
5. Acids and Bases: Acids and bases are substances that interact with each other in a neutralization reaction, resulting in the formation of water and a salt. Examples include the reaction between hydrochloric acid and sodium hydroxide to form water and sodium chloride.
These are just some of the matter interactions that may be covered in unit 2, lesson 15. The lesson may further explore the properties and behaviors associated with these interactions and their implications in various scientific fields.