Grade 9 Matter and Chemical Change Unit Review

This is Classified

100

Mixtures can be split into these two categories

What is homogenous & heterogenous

200

Pure substances can be split into these two categories

What are elements and compounds

300

This is a heterogeneous mixture made of large particles that are uniformly mixed but will settle if left undisturbed.

A suspension

400

This is used in cooking to ensure one liquid is dispersed in another liquid (so they don't separate)

An emulsifying agent

500

This is the property of two substances to mix in all proportions (that is, to fully dissolve in each other at any concentration)

Miscibility

Observing Changes in Matter

100

These are the two ways in which observations are categorized

Qualitative and Quantitative

200

This property of matter looks at how transparent or how translucent a substance is

Opacity

300

When a substance changes state, this is classified as a _______ change

Physical

400

This is the term for the quality of being capable of igniting and burning

Combustible ( or Combustibility)

500

Give three examples of quantitative properties

Density, Viscosity, Solubility, boiling/melting temperature.

Early Contributors

100

This Scientist realized that elements could combine to form compounds

Robert Boyle

200

This Scientist theorized that an atom was a positive mass with negative particles scattered throughout

JJ Thompson

300

He is known as the father of modern chemistry

Antoine Lavosier

400

This is another name for the Bohr model

The solar system model

500

Refinement of Bohr's model to make the electron cloud model was made by these contributors (Name one)

Louis de Broglie or Erwin Scrodinger

Early Elements

100

The pseudoscience that believes you can turn worthless metals into precious ones

alchemy

200

This is the process of decomposing a chemical compound by passing an electric current

Electrolysis

300

What does the Law of Conservation of Mass tell us?

Mass of the reactants is equal to the mass of the products in a closed system.

400

This explains WHY something happened based on knowledge, experiments and experience

Theory

500

Even though it failed, early alchemy helped scientists discover new methods and procedures. What is one of these new procedures

Distillation

Random

100

Cereal is an example of this type of mixture

Heterogenous (or mechanical mixture)

200

This is a type of colloid which liquids are dispersed in another liquid

Emulsion

300

What are the three types of subatomic particles within any atom?

Protons Neutrons Electrons

400

Shining a light through these types of mixtures will cause it to scatter (Name 1)

Suspension or Colloid

500

What are the names and chemical formulas of the two compounds that can be made from Nickle and Sulfur?

Nickle (II) sulfide, NiS Nickle (III) sulfide, Ni2S3 Ni2+ + S2- forms Nickle (II) Sulfide, and 2Ni3+ + 3S2- forms Nickle (III) sulfide