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Atoms and Atomic Theory. Essential Questions: How and why has the Atomic Theory changed over time? How can we describe the molecular motion of the states of matter? . Objectives. Students will explain that atoms are the smallest unit of an element and are composed of subatomic particles.
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Atoms and Atomic Theory Essential Questions: How and why has the Atomic Theory changed over time? How can we describe the molecular motion of the states of matter?
Objectives • Students will explain that atoms are the smallest unit of an element and are composed of subatomic particles. • Students will analyze models of the scientific theory of atoms. • Students will analyze models and describe the motion of particles in solids, liquids, and/or gasses.
Agenda • Bell Ringer • Atoms PowerPoint • Interactive Notebook Notes • Think-Pair-Share • Brain Pop: Atomic Theory • Gallery Walk Activity • Independent Practice
Atoms • Matter is anything that takes up space and has mass. All matter is made of atoms. • Atoms are the basic building blocks of matter. They make up everything around us; Your desk, the board, your body, everything is made of atoms! • Atoms are too small to see without powerful microscopes.
Atomic Structure There are two basic components in every atom: Electron Cloud Nucleus
Subatomic Particles Three subatomic particles make up every atom:
Subatomic Particles • Electron Cloud: • Electrons orbit the nucleus. • Nucleus or “Core”: • Protons and Neutrons are found in the nucleus.
Atomic Theory Changes over time…
Atomic Theory • Because we can not see atoms, we use models to teach and learn about atoms. • The atomic theory has changed over time as new technologies have become available. • Remember: Scientific knowledge builds on past research and experimentation.
Atomic Theory Timeline Neutrons
Think-Pair-Share! Take a minute to read the essential question as I read it aloud: “How and why has the Atomic Theory changed over time?” After you have jotted down your notes in the space on your guided notes, exchange your thoughts with your partner. We will have share-outs and discuss the answer.
http://www.brainpop.com/science/matterandchemistry/atomicmodel/http://www.brainpop.com/science/matterandchemistry/atomicmodel/
Atoms and Atomic Theory Essential Questions: How and why has the Atomic Theory changed over time? How can we describe the molecular motion of the states of matter?
Three states of matter At room temperature most substances exist in one of three physical states. gas liquid solid
Solids • The particles in a solid are very tightly packed and vibrate in place. • Solids have a definite volume and shape.
Liquids • The particles in a liquid are close together but can move and flow past one another. • Liquids have a definite volume but they do not have a definite shape. This is why liquids like water take the shape of the container they are in. Picture was taken at the exact moment these water balloons were popped!
Gases • Particles in a gas have higher amounts of energy than those in a solid or liquid. • Gases do not have a definite shape or volume. When placed in acontainer, it fills up the entire container and spreads out as far as possible.
Molecular Motion Adding heat Removing heat
In your groups, you will rotate clockwise after 4 minutes through the 5 stations. You will write all information on the Gallery Walk handout. • Stay with your group at all times. • Do not move ahead or go back, wait for the timer to move. • You may discuss possible answers with your group members. • Raise your hand if you need assistance after you have asked your group members.
