Introduction: Matter, Energy, and Measurement

This set of flashcards covers key concepts related to matter, energy, measurements, and basic chemical principles, providing an effective review tool for the upcoming exam.

What is chemistry?

Chemistry is the study of matter, its properties, and the changes it undergoes.

What is matter?

Matter is anything that has mass and takes up space.

What are the three states of matter?

Solid, liquid, and gas.

What does the Law of Conservation of Matter state?

Matter is neither created nor destroyed; it is conserved in a chemical reaction.

What are the two types of substances?

Elements and compounds.

What is a homogeneous mixture?

A mixture that has the same composition throughout.

What is a chemical property?

A property that can only be observed when a substance is changed into another substance.

What is the formula for density?

Density (D) equals mass (m) divided by volume (V).

What is SI unit for temperature?

Kelvin (K) is the SI unit of temperature.

What is absolute zero?

The lowest possible temperature, 0 K.

What are significant figures?

All digits of a measured quantity, including uncertain ones.

What is dimensional analysis?

A method used to change units by applying conversion factors.

What does the Law of Constant Composition state?

Compounds have a definite composition; the relative number of atoms of each element is the same in any sample.

How do we express large or small numbers in science?

Using scientific notation.