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Grade 7 Elements, Compounds & Mixtures Worksheet with Answers
Grade 7 (US) · Year 8 (UK) · Class 7 (India) · Science
Unit 4: Introduction to ChemistryMatterNGSS MS-PS1-1
Classifying matter as elements, compounds and homogeneous or heterogeneous mixtures. This free middle 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.comElements, Compounds & Mixtures
Grade 7 · Science
Name
Class
Date
Learning goal: Matter · NGSS MS-PS1-1
Directions: This worksheet has 2 parts. Read the instructions at the start of each part.
Element, compound or mixture? Oxygen (O₂)
Answer: element
RememberPhysical or chemical change?
Element or Compound or Mixture? Tick one box for each.
| Element | Compound | Mixture | |
|---|---|---|---|
1Salt (NaCl) | |||
2Gold | |||
3Salt water | |||
4Water (H₂O) | |||
5Air | |||
6Carbon dioxide (CO₂) | |||
7Salad |
Answer each question. Use full sentences where you can.
- 8
Can a compound be separated by filtering?
- 9
What is the difference between a compound and a mixture?
- 10
Homogeneous or heterogeneous mixture? Trail mix
- 11
Lemonade
HomogeneousHeterogeneous mixture - 12
Homogeneous or heterogeneous mixture? Muddy water
★ Challenge corner for fast finishers
Does a kilogram of feathers weigh more than a kilogram of iron?
How did I do?
Teacher's comments
Free printable worksheets with answer keys · aethelsystems.com/worksheets/science/7/substances_mixtures
Answer key — Elements, Compounds & Mixtures (Grade 7)
- 1.compound
- 2.element
- 3.mixture
- 4.compound
- 5.mixture
- 6.compound
- 7.mixture
- 8.no — it needs a chemical reaction
- 9.a compound is chemically bonded in a fixed ratio; a mixture is physically combined in any ratio
- 10.heterogeneous
- 11.homogeneous
- 12.heterogeneous
- ★no — they weigh the same
Answer key (click to show)
- 1.compound
- 2.element
- 3.mixture
- 4.compound
- 5.mixture
- 6.compound
- 7.mixture
- 8.no — it needs a chemical reaction
- 9.a compound is chemically bonded in a fixed ratio; a mixture is physically combined in any ratio
- 10.heterogeneous
- 11.homogeneous
- 12.heterogeneous
- ★no — they weigh the same (challenge corner)
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