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Environmental Scienc
Semester 2 Final Review
| Question | Answer |
|---|---|
| Pitch | Determined by the frequency of a sound wave |
| A wave will travel only as long as it has what to carry? | Energy |
| Electromagnetic Spectrum | Radio-waves, micro-waves, infrared-waves, visible light, UV waves, X-ray waves, and gamma waves |
| Radio waves | Waves with the longest wavelength |
| Type of wave with the highest energy | Gamma |
| Type of electromagnetic radiation that is used to kill cancer cells | Gamma |
| Law of Conservation of Matter | Matter cannot be created nor destroyed |
| When you add the charges of a compound, what do they have to equal? | Zero |
| 7 Diatomic Elements | N, F, I Cl, Br, H |
| Ohm's Law | Current = Voltage/resistance |
| Series | Allows only one route for an electrical current |
| Parallel | Two or more branches for electrons to follow |
| Neutrons | Neutral, 1 amu |
| Potons | Positive, 1 amu |
| Electrons | Negative |
| Kinetic Energy | Energy in the form of motion (Sound, thermal, light, electromagnetic, and mechanical) |
| Potential Energy | Stored energy (Chemical) |
| Law of Conservation of Energy | Energy cannot be created nor destroyed, only transferred |
| Compressional Waves | Parallel |
| Transverse | Perpendicular |
| Amplitude | Height of wave from resting point, measures amount of energy a wave has |
| Trough | Lowest point on a wave |
| Crest | Highest point on a wave |
| Wavelength | Distance between successive waves |
| Absorption | Ability of two or more waves to combine and form a new wave |
| Destructive Interference | Waves bounce off, change direction, or bend |
| Reflection | Wave strikes object, bounces |
| Refraction | Lighter sound waves change speeds |
| Power Formula | P = VR |
| Voltage Formula | V = IR |
| Current Formula | V/R |
| Resistance Formula | V/I |
| Static electricity | Net accumulation of electrical charges on an object |
| How does static electricity differ from electric current? | Excess charges |
| Resistance | Tendency for a material to oppose flow of electrons |
| Current | Flow of electrons through a wire or any conductor |
| Insulator | Doesn't allow easy flow of electrons |
| Conductor | Allows easy flow of electrons |
| Label for Current | Amperes |
| Label for Voltage | Volts |
| Label for Resistance | Ohms |
| Generator | Mechanical energy to electrical energy |
| Transformer | Reverses direction |
| Commutators | Reverses direction of current |
| Alternating Current | Changes directions |
| Direct Current | One direction |
| Permanent Magnet | Magnet retaining properties |
| Electric Motor | Changes electrical energy into mechanical energy |
| Electrical Induction | Moving wire through magnetic field, produces current |
| Subscript | Number of ions in each element |
| Coefficients | Number of ions in a compound |
| What makes an element chemically stable? | If it's outer energy level is completely filled with electrons |
| What makes a compound chemically stable? | If the sum of the ions is zero |
| Ionic Bond | Force of attraction between opposite charges, metal and nonmetal |
| Covalent Bond | Force of attraction between atoms when they share electrons, two nonmetals |
| Reactants | Substances to the left of the reaction arrow |
| Products | Substances to the right of the reaction arrow |
| Catalyst | Something that speeds up a reaction |
| Inhibitor | Something that slows down a reaction |
| Solutions come in what three forms? | Solid, liquids, and gasses |
| Polar | Molecule that is positively charged at one end and negatively charged at the other end |
| Substance that contains extra H+ | Hydrogen ion |
| Substance that produces extra OH- | Hydroxide ion |
| Solubility | Maximum amount of a solute that can be dissolved in a great amount of solvent at a given temperature |
| Concentration of a solution | Describes how much solute is present in a solution compared to the amount of solvent |
| Types of reactions | Single replacement, double replacement, synthesis, combustion, and decomposition |
Created by:
lmcmackin
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