Let's go through each question one by one and solve them with explanations.
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1. In a _____ mixture, each substance can be easily distinguished.
A) heterogeneous
B) homogeneous
✔ Correct Answer: A) heterogeneous
Explanation:
A
heterogeneous mixture is one where the components are not uniformly distributed and can be seen as separate phases. For example, sand and water or oil and water — you can clearly see the different parts. In contrast, a
homogeneous mixture (like saltwater) has a uniform composition throughout, so the substances cannot be easily distinguished.
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2. What is matter?
A) Matter is only things that are not alive (abiotic).
B) Matter is all things.
C) Matter is only liquids.
D) Matter is only animals.
✔ Correct Answer: B) Matter is all things.
Explanation:
Matter is anything that has mass and takes up space. This includes solids, liquids, gases, and even plasma. It applies to both living (like plants and animals) and non-living things (like rocks, water, air). So, matter encompasses
all physical substances, not just abiotic ones or only liquids or animals.
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3. Oil and water are a...
A) compound
B) element
C) heterogeneous mixture
D) solution
✔ Correct Answer: C) heterogeneous mixture
Explanation:
When oil and water are mixed, they do not dissolve into each other and form two distinct layers. You can clearly see the separation — this means it’s a
heterogeneous mixture. It is
not a solution (which would be homogeneous), nor a compound (since no chemical bond forms), and definitely not an element.
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4. What is the definition of a mixture?
A) 2+ different elements chemically combined
B) 2+ different substances physically combined
C) matter with a uniform and definite composition
✔ Correct Answer: B) 2+ different substances physically combined
Explanation:
A
mixture consists of two or more substances that are
physically combined, meaning they retain their individual properties and can be separated by physical means (like filtration or evaporation). If substances are
chemically combined, they form a
compound, not a mixture. Option C describes a pure substance (like a compound or element), not a mixture.
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5. What is a heterogeneous mixture?
A) A mixture in which you CANNOT easily distinguish all the substances
B) A mixture in which you CAN easily distinguish all the substances
C) A compound
D) A pure substance
✔ Correct Answer: B) A mixture in which you CAN easily distinguish all the substances
Explanation:
In a
heterogeneous mixture, the components are not uniformly distributed, so you can visually identify them (e.g., salad, sand in water). The key word here is "easily distinguish." Homogeneous mixtures look uniform and you cannot easily tell the parts apart.
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✔ Final Answers:
1.
A – heterogeneous
2.
B – Matter is all things.
3.
C – heterogeneous mixture
4.
B – 2+ different substances physically combined
5.
B – A mixture in which you CAN easily distinguish all the substances
Let me know if you'd like help with the remaining questions!
Parent Tip: Review the logic above to help your child master the concept of pure substances and mixtures worksheet.
