8th Grade Physical And Chemical Changes Quiz
Welcome to the 8th Grade Physical and Chemical Changes Quiz! This engaging assessment will test your understanding of the fundamental concepts surrounding physical and chemical changes in matter. Explore a diverse range of questions that challenge your knowledge about the distinction between physical and chemical changes. This quiz will also examine your grasp of various properties of matter, such as intensive and extensive properties. Through multiple-choice questions, you'll demonstrate your ability to distinguish between these key attributes and understand their significance in the world of science. This quiz will evaluate your knowledge and enhance your comprehension of the dynamic changes Read morethat occur in the substances around us. Good luck!
- 1.
When a physical property is changed, is the identity of the substance also changed?
- A.
Yes
- B.
No
Correct Answer(s)
A. Yes
B. NoExplanation
When a physical property of a substance is changed, such as its shape, size, or state of matter, the identity of the substance remains the same. This means that even though the substance may appear different or have different properties, it is still the same substance at a molecular level. Therefore, the answer is both yes and no, depending on the context of the question.Rate this question:
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- 2.
The ability to be drawn or pulled into a wire is what physical property?
- A.
Ductility
- B.
Malleability
- C.
Conductivity
- D.
Inductivity
Correct Answer
A. DuctilityExplanation
Ductility is the property of a material that allows it to be stretched or drawn into thin wires without breaking. This characteristic is often observed in metals like gold and copper.Rate this question:
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- 3.
The ability to transfer thermal energy from one area to another is called _______
Correct Answer
thermal conductivityExplanation
Thermal conductivity refers to the ability of a material to transfer thermal energy from one area to another. It is a measure of how well a material can conduct heat. Materials with high thermal conductivity can transfer heat quickly, while those with low thermal conductivity transfer heat slowly. This property is important in various applications, such as in the design of insulation materials or in the selection of materials for heat exchangers.Rate this question:
- 4.
The physical form in which a substance exists, such as a solid, liquid or gas is called a:
- A.
Density
- B.
Thermal conductivity
- C.
State
- D.
Identity
Correct Answer
C. StateExplanation
The correct answer is "State." The physical form in which a substance exists, such as a solid, liquid, or gas, is referred to as its state. This refers to the arrangement and movement of particles in the substance.Rate this question:
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- 5.
The ability to be pounded into thin sheets is called _________
Correct Answer
MalleabilityExplanation
Malleability refers to the property of a material to be easily pounded or hammered into thin sheets without breaking or cracking. It is a characteristic commonly found in metals, such as gold and aluminum, which can be shaped into various forms and structures. The term "malleability" describes the ability of a substance to undergo plastic deformation under compressive stress, allowing it to change its shape without losing its integrity. This property is essential in various industries, including construction, manufacturing, and jewelry making.Rate this question:
- 6.
Explain the physical property of solubility.
- 7.
Rusting is a common phenomenon observed in iron objects left exposed to moisture and air. Is rusting a physical change or a chemical change?
- A.
Physical change
- B.
Chemical change
- C.
Neither
- D.
Both
Correct Answer
B. Chemical changeExplanation
Rusting is a chemical change that occurs when iron reacts with oxygen and moisture in the presence of air, forming iron oxide, commonly known as rust. This process involves the rearrangement of atoms and the creation of new substances, resulting in a change in the composition and properties of the original material.Rate this question:
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- 8.
A piece of paper burns when exposed to an open flame. Is this an example of a physical change or a chemical change?
- A.
Physical change
- B.
Chemical change
- C.
Neither
- D.
Both
Correct Answer
B. Chemical changeExplanation
Burning paper involves the transformation of its chemical composition through a process of combustion, resulting in the formation of new substances like ash, smoke, and gases, which classifies it as a chemical change.Rate this question:
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- 9.
Which property of matter is described as the amount of space an object occupies?
- A.
Density
- B.
Melting point
- C.
Volume
- D.
Reactivity
Correct Answer
C. VolumeExplanation
The property of matter described as the amount of space an object occupies is called "volume." Volume represents the three-dimensional extent of an object or substance and is a fundamental characteristic used to quantify its physical size or capacity.Rate this question:
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- 10.
Which of the following is an example of a chemical change?
- A.
Freezing water into ice cubes
- B.
Dissolving salt in water
- C.
Burning a piece of wood
- D.
Mixing oil and vinegar
Correct Answer
C. Burning a piece of woodExplanation
Burning a piece of wood involves a chemical change because the complex organic molecules in the wood undergo a reaction with oxygen, leading to the release of heat, light, and the formation of new substances like ash and smoke. This transformation alters the chemical composition of the wood, distinguishing it from a simple physical change.Rate this question:
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