Science Chapter 2 Matter Flashcards

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Questions and Answers

What is matter?

Light

Energy

Anything that has mass and takes up space (correct)

Sound

How is matter classified?

Every sample of matter must be an element, a mixture, and a compound.

What is an element?

A substance that cannot be made into a simpler state, even by chemical means.

Why are carbon and copper classified as elements?

Carbon comes in many forms but is still made up of carbon atoms. Signup and view all the answers

What is an atom?

The smallest unit of an element that keeps the element's chemical properties. Signup and view all the answers

What element makes up the largest percentage of the total weight of the body?

Oxygen at a whopping 65%. Signup and view all the answers

What is a molecule?

The smallest unit of a substance that acts like the substance. Signup and view all the answers

How are elements related to compounds?

Elements can be combined to form compounds like water, which is made of H2O. Signup and view all the answers

What is a compound?

A substance made up of atoms of different elements. Signup and view all the answers

What is the relationship between compounds and molecules?

Each molecule of a compound has two or more elements that are combined chemically. Signup and view all the answers

How do compounds have unique properties?

Every compound has different elements that it contains. Signup and view all the answers

Do chemical formulas represent compounds?

Yes, chemical formulas such as H2O represent compounds. Signup and view all the answers

What is a pure substance?

Matter that has a fixed composition. Signup and view all the answers

What is a mixture?

A combination of substances that are not chemically combined. Signup and view all the answers

How are elements and compounds classified?

Both A and B Signup and view all the answers

How are mixtures classified?

Mixtures are defined by how well their substances are mixed. Signup and view all the answers

What is a heterogeneous mixture?

Mixtures that are not evenly mixed. Signup and view all the answers

What is a homogeneous mixture?

Compounds that are evenly mixed. Signup and view all the answers

What does miscible mean?

Able to be mixed. Signup and view all the answers

What does immiscible mean?

Not able to be mixed. Signup and view all the answers

Give an example of a homogeneous mixture.

Carbonated drinks. Signup and view all the answers

What is an alloy?

A metal made by combining two or more metallic elements. Signup and view all the answers

Study Notes

Matter

Defined as anything with mass that occupies space; excludes light and sound.

Classification of Matter

Matter is categorized as elements, mixtures, or compounds.

Element

A pure substance that cannot be simplified chemically.
Carbon and copper are elements as they consist solely of their respective atoms.

Atom

The smallest unit of an element retaining its chemical properties.

Body Composition

Oxygen represents 65% of the body's total weight, making it the most abundant element.

Molecule

The smallest unit of a substance that maintains the properties of that substance.

Relationship between Elements and Compounds

Elements can combine to form compounds; for example, water (H2O) consists of two hydrogen atoms and one oxygen atom.

Compound

A substance consisting of atoms from different elements, each with unique properties.

Chemical Characterization

Each molecule in a compound features two or more chemically combined elements; represented by chemical formulas like H2O.

Purity

A pure substance has a fixed composition and is not mixed with other substances.

Mixture

A combination of substances that are not chemically bonded.

Classification of Mixtures

Mixtures can be classified based on how well their components are blended.

Heterogeneous Mixture

Mixtures that are not uniformly mixed, exhibiting distinct regions.

Homogeneous Mixture

Mixtures that are evenly combined, resulting in a consistent composition.

Miscibility

Refers to the ability of substances to mix; miscible substances can be blended, while immiscible substances cannot.

Specific Mixture Examples

Carbonated drinks are categorized as homogeneous mixtures.

Alloy

A metal created by combining two or more metallic elements to enhance strength or corrosion resistance.

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Description

Test your knowledge on the basics of matter with these flashcards from Chapter 2. Learn about classifications, elements, and definitions related to matter. Perfect for students wanting to reinforce their understanding of scientific concepts.