Matter
Matter is anything that has mass and takes up space. It is the "stuff" that makes up everything in the universe, including solids, liquids, gases, and even plasma.
Properties of Matter
Matter has several properties that can be used to classify and describe it:
- Mass: The amount of matter in an object.
- Volume: The amount of space that matter occupies.
- Density: The mass of a substance per unit volume.
- State: Whether a substance is a solid, liquid, gas, or plasma.
- Physical properties: Characteristics that can be observed or measured without changing the composition of the substance, such as color, shape, and texture.
- Chemical properties: Characteristics that describe the ability of a substance to undergo chemical reactions and form new substances.
States of Matter
Matter can exist in different states, depending on the arrangement of its particles:
- Solid: Particles are tightly packed together and vibrate in place.
- Liquid: Particles are close together but can move past each other.
- Gas: Particles are far apart and move freely.
- Plasma: A high-energy state of matter in which particles are ionized and can conduct electricity.
Changes in Matter
Matter can undergo physical and chemical changes:
- Physical change: A change in the form or state of matter without changing its chemical composition, such as melting, freezing, or evaporating.
- Chemical change: A change in the chemical composition of matter, resulting in the formation of new substances, such as burning, rusting, or digesting food.
Study Tips
When studying matter, it's important to:
- Memorize the properties of matter and be able to differentiate between physical and chemical properties.
- Understand the concept of density and how it relates to mass and volume.
- Learn the characteristics of each state of matter and the changes that can occur between them.
- Practice identifying examples of matter and its properties in everyday life.
- Review and understand the different ways matter can change and the evidence of these changes.
[Matter] Related Worksheets and Study Guides:
.◂Science Worksheets and Study Guides Seventh Grade. Elements and the periodic table
Study Guide
Elements and the periodic table 
Activity Lesson
Elements & the Periodic Table Worksheet/Answer key
Elements and the periodic table Worksheet/Answer key
Elements and the periodic table Worksheet/Answer key
Elements and the periodic table Worksheet/Answer key
Elements and the periodic table Vocabulary/Answer key
Elements and the periodic table Vocabulary/Answer key
Elements and the periodic table
Activity LessonWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
Chemistry: Students will use scientific skills and processes to explain the composition, structure, and interactions of matter in order to support the predictability of structure and energy transformations.
Structure of Matter: Cite evidence to support the fact that all matter is made up of atoms, which are far too small to see directly through a microscope.
Recognize and describe that the atoms of each element are alike but different from atoms of other elements.
Recognize and describe that different arrangements of atoms into groups compose all substances.
Provide examples to illustrate that elements are substances that do not breakdown into smaller parts during normal investigations involving heating, exposure to electric current or reactions with acids.
Cite evidence to explain that all living and non-living things can be broken down to a set of known elements.