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Grade 9 Chemistry Basics (Mixed) Worksheet with Answers
Grade 9 (US) · Year 10 (UK) · Class 9 (India) · Chemistry
Unit 4: Chemical ReactionsMixed Review
A mixed set on atoms, elements, compounds and chemical reactions. This free high school worksheet has 12 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.
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Practice Sheetaethelsystems.comChemistry Basics (Mixed)
Grade 9 · Chemistry
Name
Class
Date
Learning goal: Mixed Review
Directions: This worksheet has 2 parts. Read the instructions at the start of each part.
What do we call a combination of substances that are not chemically bonded, like salt water?
Answer: a mixture
RememberAtoms, elements and compounds
Match each clue to the right word. Write the letter in the box.
- 1What is the chemical formula for water?
- 2What does an arrow mean in a chemical equation?
- 3What do we call a reaction that absorbs heat?
- 4What number on the periodic table tells you the number of protons?
- 5What is the chemical formula for methane?
- 6What is the smallest unit of an element that keeps its properties?
- AAtom
- B"produces" or "yields"
- CH₂O
- DAtomic number
- EEndothermic
- FCH₄
Answer each question. Use full sentences where you can.
- 7
What law says matter can't be created or destroyed in a reaction?
- 8
What is the mass number of an atom?
- 9
What do we call a substance made of only one type of atom?
- 10
What is the chemical formula for table salt?
- 11
What do we call two or more atoms bonded together?
- 12
Is rusting a physical change or a chemical change?
★ Challenge corner for fast finishers
Why does a spinning ice skater spin faster when she pulls her arms in?
How did I do?
Teacher's comments
Free printable worksheets with answer keys · aethelsystems.com/worksheets/chemistry/9/chemistry_basics
Answer key — Chemistry Basics (Mixed) (Grade 9)
- 1.C — H₂O
- 2.B — "produces" or "yields"
- 3.E — endothermic
- 4.D — the atomic number
- 5.F — CH₄
- 6.A — an atom
- 7.the law of conservation of mass
- 8.the number of protons plus neutrons
- 9.an element
- 10.NaCl
- 11.a molecule
- 12.a chemical change
- ★conservation of angular momentum
Answer key (click to show)
- 1.C — H₂O
- 2.B — "produces" or "yields"
- 3.E — endothermic
- 4.D — the atomic number
- 5.F — CH₄
- 6.A — an atom
- 7.the law of conservation of mass
- 8.the number of protons plus neutrons
- 9.an element
- 10.NaCl
- 11.a molecule
- 12.a chemical change
- ★conservation of angular momentum (challenge corner)
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