Free Grade 9 Chemistry Worksheets with Answers

Grade 9 Elements, Compounds & Mixtures

Classifying matter as elements, compounds and homogeneous or heterogeneous mixtures.

e.g. Element, compound or mixture? Oxygen (O₂)

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Grade 9 Physical & Chemical Changes

Telling physical changes from chemical changes and recognizing signs of a reaction.

e.g. Physical or chemical change? Dissolving sugar in tea

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Grade 9 Density

Calculating density, mass and volume, and predicting whether objects sink or float.

e.g. An object has a density of 7.9 g/cm³. Will it sink or float in water (1 g/cm³)?

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Grade 9 Atoms & Elements

HS-PS1-1

Protons, neutrons and electrons, and how atoms make up elements.

e.g. What is the mass number of an atom?

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Grade 9 Atomic Structure & Isotopes

HS-PS1-1

Finding protons, neutrons and electrons from atomic number, mass number and charge.

e.g. How many protons does an atom of carbon (C, atomic number 6) have?

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Grade 9 Periodic Table Basics

HS-PS1-1

How the periodic table is organised, element symbols, and atomic number.

e.g. What are the columns of the periodic table called?

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Grade 9 Compounds & Molecules

HS-PS1-2

How elements combine into compounds and molecules, and reading chemical formulas.

e.g. Why is water (H₂O) a compound but oxygen gas (O₂) is not?

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Grade 9 Ionic, Covalent & Metallic Bonds

HS-PS1-3

How atoms bond by transferring or sharing electrons, and the properties that result.

e.g. What holds atoms together in a metal?

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Grade 9 Chemical Reactions

HS-PS1-2

Reactants and products, types of chemical reactions, and signs that a reaction has happened.

e.g. What substance speeds up a reaction without being used up?

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Grade 9 Conservation of Mass

HS-PS1-7

In mixing, dissolving and reactions in a closed system, total mass stays the same.

e.g. In a sealed container, 37 g of one substance reacts with 35 g of another. What is the total mass of the products?

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Grade 9 Balancing Chemical Equations

HS-PS1-7

Using coefficients to balance chemical equations so atoms are conserved.

e.g. Balance the equation: Na + Cl₂ → NaCl

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Grade 9 Chemistry Basics (Mixed)

A mixed set on atoms, elements, compounds and chemical reactions.

e.g. What is the chemical formula for water?

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Grade 9 Types of Chemical Reactions

AdvancedHS-PS1-2

Synthesis, decomposition, single and double replacement and combustion reactions.

e.g. Reaction type? CH₄ + 2O₂ → CO₂ + 2H₂O

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Grade 9 Acids, Bases & pH

AdvancedHS-PS1-6

The pH scale, properties of acids and bases, neutralization and calculating pH.

e.g. Is a pH of 3 acidic or basic?

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Grade 9 Challenge: Think Like a Scientist

Challenge

Surprising questions and thought experiments that test real scientific reasoning.

e.g. Why does a spinning ice skater spin faster when she pulls her arms in?

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