Guided practice (T1 W3)
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Matter is anything that has mass and takes up space. It exists in different states, primarily solid, liquid, and gas. Each state has unique properties. For example, solids have a definite shape and volume, liquids have a definite volume but take the shape of their container, and gases have neither a definite shape nor volume.
Consider a glass of water. The water is in a liquid state, taking the shape of the glass. If we freeze the water, it becomes ice, a solid. If we heat the water until it boils, it turns into steam, a gas. This illustrates how matter can change states based on temperature.
Students will receive a list of various substances (e.g., ice, water, steam, oxygen, iron). They will work in pairs to classify each substance into its respective state of matter. After classification, students will share their findings with the class, discussing the properties that led them to their conclusions.
Students will write a short paragraph describing three examples of matter they encounter in their daily lives. They should identify the state of each example and explain why it is classified that way. This will help reinforce their understanding of matter and its properties.
Answer: Anything that has mass and takes up space
Matter is defined as anything that has mass and occupies space.
Answer: Plasma
Plasma is a state of matter, but it is often less commonly discussed than solid, liquid, and gas.
Answer: Solids have a definite shape.
Solids maintain a fixed shape and volume.
Answer: It becomes a solid
When water freezes, it changes from a liquid to a solid state, forming ice.
Answer: Matter can change states by heating or cooling.
For example, heating ice causes it to melt into water, while cooling water can freeze it into ice.
Answer: Liquid
Liquids have a fixed volume but take the shape of their container.
Answer: Oxygen
Oxygen is a gas that is essential for life and does not have a fixed shape or volume.
Answer: Solids have a definite shape, while liquids take the shape of their container.
This fundamental difference is due to the arrangement of particles in each state.