A1 Classfiying Matter

What is matter?

Anything that has mass and takes up space (has volume).

Does matter include energy such as light, heat, and sound?

No. Matter does not include any form of energy, such as light, heat, and sound.

What is a physical property?

A property that describes the physical appearance and composition of a substance.

What is a chemical property?

A property that describes the ability of a substance to change into a new substance or substances.

What is boiling point or condensation point?

The temperature at which a substance boils or condenses.

What is melting point or freezing point?

The temperature at which a substance melts or freezes.

What is malleability?

The ability to be beaten or rolled into sheets without crumbling.

What is ductility?

The ability to be stretched without breaking.

What are the three states of matter listed in the presentation?

Solid, liquid, and gas.

What is solubility?

The ability of a substance to dissolve in a liquid.

What is crystal formation as a physical property?

The crystalline appearance of a substance.

What is conductivity?

The ability of a substance to conduct heat or electricity.

What is combustibility?

The ability of a substance to burn, producing flame, heat, or light.

What is flash point?

The lowest temperature at which a flammable liquid will ignite in air.

What does behaviour in air describe as a chemical property?

A substance's tendency to degrade, react, or tarnish.

What does reaction with water describe?

A substance's tendency to corrode or dissolve when interacting with water.

What does reaction to heating describe?

A substance's tendency to melt or decompose when heated.

How can all matter be classified according to the presentation?

As either a pure substance or a mixture.

What is a pure substance?

Matter made up of only one kind of matter that has a unique set of properties.

What are examples of properties that can help identify a pure substance?

Colour, hardness, melting point, and conductivity.

What are the two types of pure substances?

Elements and compounds.

What is an element?

A substance that cannot be broken down into any simpler substance by chemical means.

What are examples of elements from the presentation?

Iron, oxygen, and neon.

What is a compound?

A pure substance made from two or more elements chemically combined.

What elements make up methane (CH4), according to the presentation?

Carbon and hydrogen.

What is a mixture?

A combination of pure substances.

Why can the properties of a mixture vary?

Because the proportions of the pure substances in the mixture can vary.

What are the two types of mixtures?

Homogeneous mixtures and heterogeneous mixtures.

What is a homogeneous mixture?

A mixture that looks the same throughout, with separate components that are not visible.

What is a solution?

A homogeneous mixture.

What two components combine to form a solution?

A solute and a solvent.

What is an example of a solution given in the presentation?

Iced tea, in which sugar and other substances are dissolved in water.

What is a heterogeneous mixture?

A mixture in which different parts of the mixture are visible.

What is a suspension?

A cloudy mixture in which tiny particles of one substance are held within another substance.

What example of a suspension is given in the presentation?

Salad dressing.

What is a mechanical mixture?

A mixture that may contain several solids combined together.

What example of a mechanical mixture is given in the presentation?

A chocolate-chip cookie.

What are atoms?

Tiny particles that make up all matter.

What is an atom?

The smallest part of an element that has all the element's properties.

What are the chemical symbols for gold and silver?

Gold is Au; silver is Ag.

Why do gold and silver have different properties?

Their atoms are different from one another, giving each element different properties, such as colour.