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Science Finals

Environmental Science Semester 2 Final Review

QuestionAnswer
What does frequency of a sound wave determine? Pitch
A wave will travel only as long as it has ... Energy
List the Electromagnetic Spectrum in order from longest wavelength to shortest. Radio waves, Microwaves, Inferred rays, Visible light, Ultraviolet rays, X-rays, and Gamma rays
The waves with the longest wavelengths in the electromagnetic spectrum are? Radio waves
Which type of electromagnetic waves with the highest energy? Gamma Rays
Which type of electromagnetic radiation is used to kill cancer cells? Gamma Rays
What is the law that states matter can be neither created nor destroyed? Law of Conservation of Matter
How many Carbon atoms are in this glucose molecule? C^6H^12O^6 6 atoms
How many Sodium atoms are present in this molecule? 5Na^3PO^4 15 atoms
A Calcium Sulfate molecule has 1 calcium (Ca) atom, 1 sulfur (S) atom, and 4 oxygen (O) atoms. What is its formula? CaSO^4
When you add the charges of a compound, what do the charges need to equal? Zero
What are the reactants and products in this equation. N + O^2 ---> NO^2 Reactants- N and O^2 Product- NO^2
Balance this equation. N^2 + H^2 ---> NH^3 N^2 + 3H^2 ---> 2NH^3
What type of reaction is this equation? MgCl^2 + 2LiBr ---> MgBr^2 + 2LiCl Double Replacement
What type of reaction is this equation? C^6H^12 + 9O^2 ---> 6CO^2 + 6H^2O Combustion
What type of reaction is this equation? Pb + FeSO^4 ---> PbSO^4 + Fe Single Replacement
What type of reaction is this equation? CaCO^3 ---> CaO + CO^2 Decomposition
What type of reaction is this equation? P^4 + 3Cl^2 ---> 2P^2Cl^3 Synthesis
What are the 7 diatomic elements? Nitrogen, Fluorine, Iodine, Chlorine, Oxygen, Bromine, and Hydrogen
What law says current is equal to the potential difference divided by the resistance? Ohms Law. Potential Difference= Current x Resistance
What is a material that allows electrons to move easily through it, examples are Copper and Silver (Metals) Conductor
What is a material that doesn't allow electrons to move easily through it, examples are plastic, glass, and wood (Non-metals) Insulator
2 positive or negative charges do what to each other? Repel
What is a path that allows only one route for an electric current? Series Circuit
What is a circuit that has two or more branches for electrons to follow? Parallel Circuit
What is the charge and mass of Neutrons? Neutral. 1 amu
What is the charge and mass of Protons? Positive. 1 amu
What is the charge and mass of Electrons? Negative. No mass
What is energy in the form of motion? Kinetic energy. KE= 1/2 x Mass x Velocity^2
What is stored energy? Potential energy. PE= Mass x Height x 9.8m/s^2
What type of energy is Chemical energy? Potential or Kinetic Potential
What type of energy is Sound, Light, Electromagnetic, Mechanical, and Thermal? Potential or Kinetic Kinetic
What are some other forms of energy? Wind, Nuclear, Tidal, etc.
What law states that energy cannot be created nor destroyed? Law of conservation of energy
As particles in an object move faster, the temperature ... Increases
What type of wave moves parallel to the medium, an example would be a slinky or sound Compressional waves
What type of wave moves perpendicular, an example would be ocean waves Transverse waves
What is the height of the wave from rest and measures the amount of energy the wave has? Amplitude
What is the lowest point of a wave? Trough
What is the highest point of a wave? Crest
What is the distance between a point on one wave to the identical point on the next wave? Wavelength
What is the formula for a wave? Velocity= Wavelength x Frequency
If the frequency is cut in half, the wavelength will ... double
What is the ability of two or more waves to combine and form a new wave? Interference (constructive)
What is it called when a crest hits a trough and they cancel each other out? Destructive Interference
What is the term for the returning light, an example is a mirror. Reflection
What is the term for the bonding light, an example is objects in water. Refraction
What is the formula for power? Power= Voltage x Current
What is the formula for voltage? Voltage= Current x Resistance
What is the formula for current? Current= Voltage/Resistance
What is the formula for resistance? Resistance= Voltage/Current
What is the net accumulation of electric charges on an object? Static Electricity
What is the tendency for a material to oppose the flow electrons and has a label of ohms? Resistance
What is the flow of electrons through a wire or any conductor and has a label of amps? Current
What produces electrical current by rotating a loop wire in a magnetic field? Generator
What can increase or decrease the voltage of an alternating current? Transformer
What is a reversing switch in a motor that rotates with an electromagnet? Commutator
What kind of current goes in one direction? Direct Current
What kind of current reverses its direction? Alternating Current
What kind of object is magnetic all the time? Permanent Magnet
What changes electrical energy into mechanical energy? Electric Motor
What is the process by which moving a wire through a magnetic field produces an electric current? Electrical Induction
What are some examples of chemical symbols? Cl, H, F, He, H, and Sn
What are some examples of chemical formulas? CO^2, H^2O, and SO^4
What is the subscript used for in chemical formulas? Number of Atoms
What are coefficients used for in chemical reactions? Number of units
What makes an element chemically stable? Must have a full outer shell
What makes a compound chemically stable? It has a neutral charge
What is the type of bond that transfers electrons? Ionic bond
What is the type of bond that shares electrons? Covalent bond
How many atoms of Chlorine are there in this formula? Ca(ClO^3)^2 2 atoms
Name this compound: Mg(SO^4) Magnesium Sulfate
What makes a chemical equation/reaction balanced? When there is the same amount of electrons on each side of the yields sign
What are the substances to the left of the reaction arrow called? Reactants
What are the substances to the right of the reaction arrow called? Products
Which law states that the number of atoms on the reactants side will equal the number of atoms on the products side? Law of Conservation of Mass
What speeds up a reaction? Catalyst
What slows down a reaction? Inhibitor
What 3 forms do solutions come in? Solid, Liquid, and Gas
What molecule is positively charged at one end and negatively charged at the other end? Polar Molecule
What is the maximum amount of a solute that can be dissolved is a given amount of solvent at a given temperature? Solubility
What describes how much solute is present in a solution compared to the amount of solvent? Concentration of a solution
What is a substance called when it contains extra H+? Acid
What is a substance called when it produces extra OH-? Base
What are some examples of an Acid? Lemon Juice, Soda, and Vinegar
What are some examples of a Base? Baking Soda, Soaps, and Ammonia
Created by: Aallen2019