Questions and Answers
What is the definition of mass?
The amount of matter inside an object.
What units are used to measure mass?
Grams and kilograms.
What instrument is used to measure mass?
A balance.
What is the definition of volume?
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What units are used to measure volume?
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What instruments are used to measure volume?
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What is the definition of density?
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What is the equation to find density?
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What units are used to measure density?
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How are physical and chemical properties similar?
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Give two examples of physical changes.
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Give two examples of chemical changes.
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How are heterogeneous and homogeneous mixtures similar?
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Give two examples of homogeneous mixtures.
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Give two examples of heterogeneous mixtures.
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What is a substance?
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What are two types of substances?
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How are an element and a compound similar?
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Give two examples of elements.
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Give two examples of compounds.
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What is the definition of density?
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What is the formula for density?
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Why do some things float on water and others do not?
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What does something need to have in order to be considered matter?
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What is mass?
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What units are used to measure mass?
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What tools are used to measure mass?
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What is volume?
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What units are used to measure volume?
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What tools are used to measure volume?
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Study Notes
Mass
- Defined as the amount of matter contained within an object.
- Measured in grams (g) and kilograms (kg).
- Measured using a balance.
Volume
- Refers to the amount of space an object occupies.
- Measured in cubic centimeters (cm³) and milliliters (mL).
- Instruments include a ruler and a graduated cylinder.
Density
- Represents the amount of mass per unit volume, specifically mass in grams per cubic centimeter (g/cm³).
- Calculated using the formula: Density (D) = Mass (m) / Volume (v).
- Units for density are grams per cubic centimeter (g/cm³).
Physical and Chemical Properties
- Physical changes do not create new substances (e.g., ice melting, dry ice sublimating) while chemical changes result in new substances (e.g., burning paper, rusting iron).
- Both types of changes alter the materials involved.
Mixtures
- Homogeneous mixtures have uniform composition and properties throughout (e.g., water, blood).
- Heterogeneous mixtures have distinctly different components (e.g., earth and water mixed, oil and water).
Substances
- Defined as pure chemicals and can be classified into two types: elements and compounds.
- Elements consist of only one type of atom, while compounds are made of bonded atoms from different elements.
Phase Changes
- Classified as physical changes because they do not alter the chemical identity of the substance involved.
Matter
- Divided into two main categories: elements and compounds.
- Considered matter only if it possesses both mass and volume.
Floating and Density
- Objects float on water if their density is less than that of water; density determines buoyancy.
Measurement Tools
- Mass measured with a triple beam balance.
- Volume measured using tools like rulers and graduated cylinders.
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Description
This quiz covers fundamental concepts of mass, volume, and density, crucial for understanding physical science. Explore how these measurements relate to matter and learn about the physical and chemical properties that define substances. Test your knowledge of mixtures and their characteristics.
