About This Chapter
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Topics from your homework you'll be able to complete:
- Atomic and mass numbers
- Methods for building compounds and molecules from elements
- Physical and chemical properties of matter
- States of matter
- Phase changes of matter
- Common chemical reactions
- Nuclear reactions
- Half-life calculations
- Cycles of matter
1. What Are Elements?
Look around you. What do you see? Elements are everywhere. They are the building blocks of all matter on Earth. In this lesson, we will discuss what an element is, how elements are written as symbols, and how elements are the building blocks of all matter.
2. Atomic Number and Mass Number
Atoms are the basic building blocks of everything around you. In order to really understand how atoms combine to form molecules, it's necessary to be familiar with their structure. In this lesson, we'll dissect atoms so we can see just what really goes into those little building blocks of matter.
3. How Compounds and Molecules Are Built From Elements
Did you know that elements are like people and have different personalities? A few elements are very shy and love to be left alone. Others are very social and prefer to hang out with friends. In this lesson we will discuss how elements build molecules and compounds.
4. Matter: Physical and Chemical Properties
How are substances identified? There are two major ways we can describe a substance: physical properties and chemical properties. Learn about how chemists use properties to classify matter as either a mixture or a pure substance.
5. States of Matter: Solids, Liquids, Gases, & Plasma
Learn the four states of matter in the universe: solid, liquid, gas and plasma. Learn about the differences in shape and volume among the four states, which of the states is the most common and why plasma conducts electricity.
6. Phase Change: Evaporation, Condensation, Freezing, Melting, Sublimation & Deposition
Substances on Earth can exist in one of four phases, but mostly, they exist in one of three: solid, liquid or gas. Learn the six changes of phase: freezing, melting, condensation, vaporization, sublimation and deposition.
7. Common Chemical Reactions and Energy Change
This lesson covers the five common types of chemical reactions: combination, decomposition, single-replacement, double-replacement, and combustion. You will learn how to predict what kind of chemical reaction will occur. You'll also explore how matter is conserved, but energy can change.
8. Nuclear Reaction: Definition & Examples
Learn the differences between a nuclear reaction and a chemical reaction. Also learn how the nuclear reaction involves subatomic particles including protons and neutrons. Discover the different types of nuclear reactions including fission and fusion and also how a nuclear power plant works to produce energy.
9. Half-life: Calculating Radioactive Decay and Interpreting Decay Graphs
What causes a radioactive particle to decay? We'll never really know, but our best guess lies in probability. In this lesson, we are going to focus on the half-life, a way of measuring the probability that a particle will react.
10. Cycles of Matter: The Nitrogen Cycle and the Carbon Cycle
Matter is constantly cycled between living and nonliving parts of the environment. Processes like photosynthesis and nitrogen fixation allow the carbon and nitrogen cycles to regenerate needed substances by recycling Earth's atoms.
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Other chapters within the Earth Science: Homework Help Resource course
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- Geologic Time and Earth Science: Homework Help
- Earth's Spheres and Internal Structure: Homework Help
- Plate Tectonics: Homework Help
- Minerals and Rocks: Homework Help
- Igneous Rocks: Homework Help
- Volcanoes: Homework Help
- Weathering and Erosion: Homework Help
- Sedimentary Rocks - A Deeper Look: Homework Help
- Metamorphic Rocks - A Deeper Look: Homework Help
- Rock Deformation and Mountain Building: Homework Help
- Water Balance: Homework Help
- Running Water: Homework Help
- Ground Water: Homework Help
- Glaciers: Homework Help
- Oceans: Homework Help
- Coastal Hazards: Homework Help
- The Atmosphere: Homework Help
- Weather and Storms: Homework Help
- Earthquakes: Homework Help
- Earth History: Homework Help
- Energy Resources: Homework Help