Matter and Change

Matter and mass are important concepts in science. Matter is anything that has mass and takes up space. Everything around us, including air, water, ro

Density and volume are important properties that help us understand the nature of matter. Volume measures the amount of space an object occupies, whil

Physical properties are characteristics of matter that can be observed or measured without changing the substance’s identity. These properties include

Chemical properties describe how a substance can change into a different substance through a chemical reaction. These properties include reactivity, f

Everything around us is made of matter, which can be classified into three main types: elements, compounds, and mixtures. Elements are pure substances

A mixture is a combination of two or more substances that are physically combined but not chemically bonded. Mixtures can be classified into two main

A physical change occurs when a substance changes in form, shape, or state but does not become a new substance. Some examples of physical change inclu

A chemical change occurs when a substance transforms into a new substance with different properties. Examples include rusting iron, burning wood, and

The Law of Conservation of Mass states that matter cannot be created or destroyed in a chemical reaction; it only changes form. The total mass of subs

Matter exists in different states - solid, liquid, gas, and plasma. Solids and liquids are the most common states. A solid has a fixed shape and volum

Now that we know matter exists in different states, we are going to focus on two of the most dynamic states- gases and plasma. A gas has no fixed shap

Matter can change from one state to another when heat energy is added or removed. Freezing and melting are opposite processes that involve changing th

Matter changes from one state to another when heat is added or removed. Boiling and evaporation are two processes in which a liquid turns into a gas.

Condensation happens when a gas turns into a liquid, such as water vapor, forming dew.Sublimation occurs when a solid changes directly into a gas with

Boyle’s Law describes how gases behave when pressure and volume change. It states that if the temperature remains constant, the pressure of a gas incr

Charles’ Law describes how gases expand when they warm up and shrink when they cool off—as long as the pressure remains constant. It shows a direct re