Grade 7 Chemistry Worksheet: Atoms, Elements, and Mixtures
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General
2 questions
~4 mins
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About This Worksheet
A medium difficulty Science worksheet on atoms_elements for grade 7 students. Includes questions on Atoms and Elements, Pure Substances and Mixtures, Solutions and Solubility.
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Grade 7 Chemistry Worksheet: Atoms, Elements, and Mixtures
Subject: GeneralGrade: General
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Grade 7 Chemistry Worksheet: Atoms, Elements, and Mixtures
Instructions: Read each question carefully and answer to the best of your ability. For multiple choice questions, select the correct option. For short answer questions, write your answer clearly and completely.
A
Atoms and Elements
1.
What is the smallest unit of an element that retains its properties?
[1 mark]2.
Which of the following is an element?
[1 mark]AWater
BSalt
CSugar
DOxygen
B
Pure Substances and Mixtures
1.
Define a pure substance in the context of chemistry.
[2 marks]2.
Which of the following is a mixture?
[1 mark]AGold
BTable salt
COxygen gas
DSand and iron filings
C
Solutions and Solubility
1.
What is a solution in chemistry?
[2 marks]2.
In a saltwater solution, which is the solute?
[1 mark]ASalt
BWater
CSugar
DSand
D
Solubility Calculations and Graphs
1.
If 50 grams of salt dissolve in 100 mL of water at a certain temperature, what is the solubility of salt in grams per 100 mL?
[2 marks]2.
A solubility graph shows that at 40°C, 70 grams of sugar can dissolve in 100 mL of water. What is the solubility of sugar at that temperature?
[2 marks]E
Separation Techniques
1.
Which separation technique is best used to separate a solid from a liquid by heating the mixture until the liquid evaporates?
[1 mark]AFiltration
BDecantation
CChromatography
DEvaporation
2.
Name the separation technique that involves pouring off a liquid without disturbing the solid sediment at the bottom.
[2 marks]3.
Which technique is used to separate a mixture of dyes based on their movement through a special paper?
[1 mark]AChromatography
BDistillation
CFiltration
DEvaporation
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Details
- Created
- 11/18/2025
- Updated
- 12/29/2025
- Type
- worksheet