Science Classifying Matter Flashcards

Questions and Answers

What are examples of mechanical mixtures?

Sand (correct)

Stainless steel

Salad (correct)

Salt water

What are molecules made up of?

Two or more different atoms combined in fixed proportions.

What is a solution?

A homogeneous mixture.

A heterogeneous mixture is made up of uniformly mixed particles.

False Signup and view all the answers

List the seven elements that form diatomic molecules.

Hydrogen, oxygen, bromine, fluorine, iodine, chlorine, nitrogen. Signup and view all the answers

What is a suspension?

A mixture that looks homogeneous but particles will settle into different visible phases over time. Signup and view all the answers

What is phase in a mixture?

A visibly distinguished layer. Signup and view all the answers

What is another term for a homogeneous mixture?

Solution. Signup and view all the answers

What are alloys made up of?

Metals. Signup and view all the answers

What are pure substances?

Materials made up of only one type of particle. Signup and view all the answers

What is considered a compound?

Water Signup and view all the answers

How is a mixture defined?

A substance made up of two or more different types of particles or pure substances. Signup and view all the answers

An alloy is a mixture of different pure substances.

False Signup and view all the answers

What must be true for two or more different atoms to form a molecule in a compound?

They must be combined in fixed proportions. Signup and view all the answers

What is matter?

Anything that has mass and volume. Signup and view all the answers

What is an example of a homogeneous mixture of gas?

Air. Signup and view all the answers

What is the definition of a homogeneous mixture?

Made up of two or more particles that are uniformly mixed together. Signup and view all the answers

What are carbon dioxide molecules made up of?

One atom of carbon and two atoms of oxygen. Signup and view all the answers

What characterizes a uniform mixture?

It looks like it is made up of all the same particles. Signup and view all the answers

What is a compound composed of?

All the same molecules. Signup and view all the answers

What is a notable example of an alloy?

Bronze. Signup and view all the answers

Study Notes

Classification of Matter

Mechanical Mixtures: Examples include salad, sand, and laundry; distinct particles are visible.
Molecules: Compounds consist of identical molecules, each made of two or more different atoms in fixed proportions.
Solutions: Include substances like stainless steel, air, and saltwater; these are homogeneous mixtures.
Heterogeneous Mixtures: Composed of two or more visibly distinct particles that are not uniformly mixed.
Diatomic Molecules: Include hydrogen, oxygen, bromine, fluorine, iodine, chlorine, and nitrogen; consist of two bonded atoms.
Suspension: Appears homogeneous but particles will settle into distinct phases over time.
Phase: A visibly distinct layer in a mixture, indicating variation in composition.
Homogeneous Mixture: Another term for a solution, where particles are uniformly mixed.
Alloys: Mixtures of metals such as bronze, brass, 18 karat gold, and stainless steel.
Pure Substances: Includes water, oxygen, carbon dioxide, hydrogen, and chlorine; each consists of only one type of particle.
Elements: Substances composed of the same types of atoms; have uniform properties.
Compounds: Formed from molecules containing different atoms in fixed proportions, for example, water or carbon dioxide.
Mixtures: Combinations of two or more different types of particles or pure substances that retain individual properties.
Mechanical Mixture Characteristics: Different particles are easily visible, forming separate phases within the mixture.

Key Definitions

Composition: Classifying matter based on the type of particles it is made from.
Diatomic Molecules: Comprised of two atoms bonded together, common in elemental gases.
Homogeneous Mixture of Gas: Air is a primary example, with gases evenly distributed.
Atoms: Fundamental particles that make up elements, ensuring uniform composition within.
Carbon Dioxide: A compound made of one carbon atom and two oxygen atoms.
Matter: Defined as anything that possesses mass and occupies volume.
Pure Substance: Defined by its consistency of a single type of particle, either an element or a compound.
Bronze: An alloy made from copper and tin, widely used for statues due to its durability.
Formation of Molecules: Requires two or more different atoms to combine in fixed proportions to create a molecule in a compound.

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Description

Test your knowledge of classifying matter with these engaging crossword flashcards. Explore key concepts including mechanical mixtures, molecules, and solutions through interactive definitions and examples. Perfect for reinforcing your understanding of basic science concepts.