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Questions and Answers
What is an atom?
What is an atom?
- A small particle that is a building block of matter (correct)
- A large compound
- A mixture of elements
- A type of substance made of various elements
Define a compound.
Define a compound.
A substance containing atoms of two or more different elements chemically bonded together.
Dissolving means to mix substances evenly.
Dissolving means to mix substances evenly.
True (A)
What is a heterogeneous mixture?
What is a heterogeneous mixture?
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What is matter?
What is matter?
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A ______ is matter that can vary in composition.
A ______ is matter that can vary in composition.
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Explain what a physical property is.
Explain what a physical property is.
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Density is defined as mass per unit volume of a substance.
Density is defined as mass per unit volume of a substance.
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Identify the correct statement about solids.
Identify the correct statement about solids.
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Match the states of matter with their characteristics:
Match the states of matter with their characteristics:
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Study Notes
Atom
- Smallest particle that makes up matter.
Compound
- Made of two or more different elements chemically bonded together, like water.
Dissolve
- Mixing substances evenly to form a solution, like sugar dissolving in water.
Element
- Consists of only one type of atom, like gold.
Heterogeneous Mixture
- Individual substances are not evenly mixed, like sand and water.
Homogeneous Mixture
- Individual substances are evenly mixed, like saltwater.
Matter
- Anything that has mass and takes up space.
Mixture
- Matter with a variable composition, like a salad.
Substance
- Matter with a constant composition, like pure water.
Bond
- Force holding atoms or groups of atoms together.
Density
- Mass per unit volume of a substance, like the density of water.
Mass
- Amount of matter in an object.
Physical Property
- Characteristic of matter that can be observed or measured without changing its identity, like color.
Property
- Characteristic used to describe something, like the color of a flower.
Solubility
- Ability of one substance to dissolve in another, like sugar dissolving in water.
Physical Change
- Change in size, shape, form, or state of matter where the identity of the matter remains the same, like melting ice.
Solid
- Definite shape and volume, like ice.
Liquid
- Definite volume, but no definite shape, like water.
Gas
- No definite shape or volume, like air.
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