What distinguishes a substance from a material?

A substance is a pure form of matter, whereas a material can be a mixture of different substances.

Fill in the blank: Glass is produced by mixing sand, soda ash, and ___ to form a liquid that solidifies.

Limestone

True or False: All particles in matter are visible to the naked eye.

False. Most particles are too small to see.

In which state of matter are particles tightly packed in a regular pattern?

Solid

Riddle: I can be solid, liquid, or gas, but I am always made of tiny parts. What am I?

Matter

Fill in the blank: In liquids, particles are close together but not in a ___ pattern, allowing them to flow.

Regular

What role does the particle model of matter play in understanding different states of matter?

What distinguishes the particle arrangement of solids from that of liquids?

Fill in the blank: Solids maintain their shape unless acted upon by a ___.

Force

True or False: Liquids have a fixed shape.

False. Liquids do not have a fixed shape; they flow and take the shape of their container.

What is the behavior of certain solids, known as powders, that allows them to act like liquids?

Riddle: I can be reshaped with force but hold my form unless pushed. What am I?

A solid

Fill in the blank: The ability of liquid particles to move and slide past each other enables ___ to flow.

Liquids

What happens to the shape of a solid when sufficient force is applied?

It can be reshaped or deformed.

Multiple Choice: Which of the following properties is characteristic of liquids? A) Fixed shape B) Rigid structure C) Takes the shape of the container D) Minimal movement

C) Takes the shape of the container

What is the primary reason that most solids cannot flow?

Most solids cannot flow because their particles are tightly packed with minimal space for movement.

What is the process called when a solid changes to a liquid due to heating?

Melting is the process by which a solid changes into a liquid when heated.

During the solidifying process, the movement of particles ___ as the temperature decreases.

During the solidifying process, the movement of particles decreases as the temperature decreases.

True or False: Melting and solidifying alter the chemical composition of the substance.

Fill in the blank: The particle model explains changes of state by describing changes in particle ___ and movement.

Arrangement

What happens to the arrangement of particles in a solid when it melts?

Riddle: I can turn from solid to liquid with heat, and from liquid to solid when cooled. What am I?

Water, as it transitions between ice and liquid water.

What is the main difference between physical processes like melting and chemical reactions?

Fill in the blank: The change of state from a liquid to a solid is known as ___ or freezing.

Solidifying

Explain why not all solids melt at the same temperature.