Gr 8 Natural Sciences Ch 2.2: Changes of state

What is the term for the gaseous state of a substance that is normally a liquid or solid at room temperature?

Transformation
Energetic
Vapour (correct)
Vigorous

What process involves the transformation of a gas to a liquid?

Melting
Evaporation
Condensation (correct)
Boiling

What is the term for the process by which a liquid changes to a gas at a temperature below its boiling point?

Boiling
Evaporation (correct)
Melting
Freezing

What is the result of heating a solid to its melting point?

It becomes a liquid (C) Signup and view all the answers

What occurs at a specific temperature called the boiling point?

Boiling (B) Signup and view all the answers

What is the term for the process by which a solid changes to a liquid?

Melting (D) Signup and view all the answers

What is the result of cooling a liquid to its freezing point?

It becomes a solid (C) Signup and view all the answers

What is required for matter to change from one state to another?

The addition or removal of energy (B) Signup and view all the answers

What happens to the particles of a gas when it cools?

They slow down and come closer together (D) Signup and view all the answers

What is an example of condensation?

Water droplets forming on the outside of a cold glass (B) Signup and view all the answers

What is the term for the direct change from solid to gas?

Sublimation (D) Signup and view all the answers

What is the term for the direct change from gas to solid?

Deposition (A) Signup and view all the answers

What happens to the particles of a liquid when it cools and solidifies?

They slow down and lock into fixed positions (D) Signup and view all the answers

What is the term for the process of a liquid changing to a gas?

Evaporation (D) Signup and view all the answers

What is the term for the process of a solid changing to a liquid?

Melting (D) Signup and view all the answers

What is a measure of the average kinetic energy of a substance's particles?

Temperature (C) Signup and view all the answers

What is the primary reason for a change of state to occur?

The gain or loss of energy (C) Signup and view all the answers

What is the result of cooling a gas?

It becomes a liquid (A) Signup and view all the answers

Which of the following processes occurs at a specific temperature?

Boiling (D) Signup and view all the answers

What is the difference between evaporation and boiling?

Evaporation occurs at the surface, while boiling occurs throughout the liquid (B) Signup and view all the answers

What happens to the particles of a solid when it is heated to its melting point?

They vibrate more vigorously (C) Signup and view all the answers

What is the result of heating a liquid?

It becomes a gas (B) Signup and view all the answers

Which of the following processes involves the transformation of a liquid to a solid?

Freezing (D) Signup and view all the answers

What is the term for the change in the form, appearance, nature, or character of a substance?

Transformation (A) Signup and view all the answers

What happens to the particles of a substance when it changes from a solid to a liquid?

They gain energy and move farther apart (A) Signup and view all the answers

What is the direct change from gas to liquid called?

Condensation (C) Signup and view all the answers

What is an example of deposition?

Frost forming on a cold surface (B) Signup and view all the answers

What is the term for the process of a liquid changing to a gas?

Evaporation (D) Signup and view all the answers

What occurs when a liquid is heated to its boiling point?

It boils (B) Signup and view all the answers

What is the result of cooling a gas to its dew point?

It condenses (B) Signup and view all the answers

What happens to the average kinetic energy of a substance's particles when it changes from a liquid to a gas?

It increases (C) Signup and view all the answers

What is the term for the process of a solid changing to a liquid?

Melting (C) Signup and view all the answers

What is the primary reason for a substance to change from solid to liquid?

Increase in average kinetic energy of particles (D) Signup and view all the answers

What happens to the particles of a gas when it is cooled to its dew point?

They slow down and come closer together (B) Signup and view all the answers

What is the difference between melting and solidifying?

Melting involves heating, while solidifying involves cooling (C) Signup and view all the answers

What is the relationship between the temperature of a substance and the kinetic energy of its particles?

As temperature increases, kinetic energy increases (B) Signup and view all the answers

What is an example of a process that involves both condensation and deposition?

Frost forming on a cold window (C) Signup and view all the answers

What is the difference between boiling and evaporation?

Boiling occurs at the surface of a liquid, while evaporation occurs throughout the liquid (D) Signup and view all the answers

What is the result of cooling a gas to a temperature below its dew point?

The gas will condense into a liquid (D) Signup and view all the answers

What is the relationship between the state of matter and the kinetic energy of its particles?

Gases have the highest kinetic energy, followed by liquids, and then solids (D) Signup and view all the answers

What is the primary reason for the particles of a solid to break free from their fixed positions during the melting process?

The particles gain energy and vibrate more vigorously. (B) Signup and view all the answers

What is the result of cooling a liquid to a temperature below its freezing point?

The liquid turns into a solid. (D) Signup and view all the answers

What is the difference between evaporation and boiling in terms of the location of the phase change?

Evaporation occurs at the surface, while boiling occurs throughout the liquid. (D) Signup and view all the answers

What is the result of heating a liquid to a temperature above its boiling point?

The liquid turns into a gas. (C) Signup and view all the answers

What is the term for the process of a gas changing to a liquid when it cools to a temperature below its dew point?

Condensation (D) Signup and view all the answers

What is the result of heating a solid to a temperature below its melting point?

The solid remains in its solid state. (D) Signup and view all the answers

What is the primary reason for a change of state to occur?

The particles gain or lose energy. (A) Signup and view all the answers

What is the term for the transformation of a liquid to a solid?

Freezing (B) Signup and view all the answers

What is the primary reason for a substance to change from one state to another?

The substance gains or loses energy (C) Signup and view all the answers

What occurs when a liquid is heated to its boiling point?

Bubbles form throughout the liquid and rise to the surface (B) Signup and view all the answers

What is the difference between evaporation and boiling?

Evaporation occurs only at the surface, while boiling occurs throughout the liquid (D) Signup and view all the answers

What happens to the particles of a solid when it is heated to its melting point?

They vibrate more vigorously and break free from their fixed positions (B) Signup and view all the answers

What is the result of cooling a gas to its dew point?

The particles condense and change into a liquid (A) Signup and view all the answers

What happens to the average kinetic energy of particles during condensation?

It decreases (C) Signup and view all the answers

Which process occurs when the temperature of a substance is below its melting point?

Solidifying (C) Signup and view all the answers

What is the result of heating a solid to its melting point?

It melts (A) Signup and view all the answers

Which process occurs when a gas changes to a solid without going through the liquid phase?

Deposition (C) Signup and view all the answers

What is the primary reason for a change of state to occur?

A change in temperature (B) Signup and view all the answers

Gr 8 Natural Sciences Ch 2.2: Changes of state

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Questions and Answers

What is the term for the gaseous state of a substance that is normally a liquid or solid at room temperature?

What process involves the transformation of a gas to a liquid?

What is the term for the process by which a liquid changes to a gas at a temperature below its boiling point?

What is the result of heating a solid to its melting point?

What occurs at a specific temperature called the boiling point?

What is the term for the process by which a solid changes to a liquid?

What is the result of cooling a liquid to its freezing point?

What is required for matter to change from one state to another?

What happens to the particles of a gas when it cools?

What is an example of condensation?

What is the term for the direct change from solid to gas?

What is the term for the direct change from gas to solid?

What happens to the particles of a liquid when it cools and solidifies?

What is the term for the process of a liquid changing to a gas?

What is the term for the process of a solid changing to a liquid?

What is a measure of the average kinetic energy of a substance's particles?

What is the primary reason for a change of state to occur?

What is the result of cooling a gas?

Which of the following processes occurs at a specific temperature?

What is the difference between evaporation and boiling?

What happens to the particles of a solid when it is heated to its melting point?

What is the result of heating a liquid?

Which of the following processes involves the transformation of a liquid to a solid?

What is the term for the change in the form, appearance, nature, or character of a substance?

What happens to the particles of a substance when it changes from a solid to a liquid?

What is the direct change from gas to liquid called?

What is an example of deposition?

What is the term for the process of a liquid changing to a gas?

What occurs when a liquid is heated to its boiling point?

What is the result of cooling a gas to its dew point?

What happens to the average kinetic energy of a substance's particles when it changes from a liquid to a gas?

What is the term for the process of a solid changing to a liquid?

What is the primary reason for a substance to change from solid to liquid?

What happens to the particles of a gas when it is cooled to its dew point?

What is the difference between melting and solidifying?

What is the relationship between the temperature of a substance and the kinetic energy of its particles?

What is an example of a process that involves both condensation and deposition?

What is the difference between boiling and evaporation?

What is the result of cooling a gas to a temperature below its dew point?

What is the relationship between the state of matter and the kinetic energy of its particles?

What is the primary reason for the particles of a solid to break free from their fixed positions during the melting process?

What is the result of cooling a liquid to a temperature below its freezing point?

What is the difference between evaporation and boiling in terms of the location of the phase change?

What is the result of heating a liquid to a temperature above its boiling point?

What is the term for the process of a gas changing to a liquid when it cools to a temperature below its dew point?

What is the result of heating a solid to a temperature below its melting point?

What is the primary reason for a change of state to occur?

What is the term for the transformation of a liquid to a solid?

What is the primary reason for a substance to change from one state to another?

What occurs when a liquid is heated to its boiling point?

What is the difference between evaporation and boiling?

What happens to the particles of a solid when it is heated to its melting point?

What is the result of cooling a gas to its dew point?

What happens to the average kinetic energy of particles during condensation?

Which process occurs when the temperature of a substance is below its melting point?

What is the result of heating a solid to its melting point?

Which process occurs when a gas changes to a solid without going through the liquid phase?

What is the primary reason for a change of state to occur?

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