Where are Electrons located in the atom and what are their charge? Outside the nucleus (Electron Cloud) Negative Where are Neutrons located in the atom and what is the charges of the neutron? Nucleus of the atom No Charge Where are Protons located in the atom and what is the charge of Protons? Nucleus of the atom Positive charge 2H 2H 2 0 What are the Reactants in the equation above? What are the Products in the equation above? Reactants: 2H 2 + O 2 Products: 2H 2 0 2Ca + O 2 2CaO What is the coefficient of O 2 ? The Coefficient is 1 The formula for Ethanol is C 2 H 5 OH. How many elements does methane contain? How many atoms or Carbon are there in Ethanol? How many atoms of Hydrogen are there in Ethanol? How many atoms of Oxygen are the in Ethanol? There are 3 elements present. There are 2 atoms of Carbon. There are 6 atoms of Hydrogen. There is 1 atom of Oxygen. Which diagram represents a compound? A. B. A. is a compound of CO 2 B. is a molecule of Oxygen The following is a diagram of Hydrogen Peroxide. What is the chemical formula for Hydrogen Peroxide? H2O2H2O2 According to the periodic table, is Nitrogen a metal or nonmetal? What is Nitrogens atomic number? Nonmetal Nitrogen is on the right side of the periodic table where the nonmetals are located. Atomic Number is 7. Is Calcium (Ca) Considered a metal or nonmetal? Metal What type of elements are good conductors and malleable? Metals Elements in a periodic table are arranged left to right and top to bottom in order of what? Increasing Atomic Number Why are Noble Gases considered Stable or Non-Reactive? Because they have a full valence energy level. Which two elements shown below would have the most similar chemical properties? Boron and Aluminum or Carbon and Silicon Because they are in the same family or group. Which group on the periodic table are the most reactive metals? Group 1 Alkali Metals Which of these groups in the Periodic Table are primarily gases at room temperature? Noble Gases Group 18 Group 8A Name an element that would have similar chemical properties to Copper? Silver or Gold What is the atomic mass of the following atom? Atomic Mass 7 Identify the following element. Lithium Atomic Number=3 Least Reactive : 8 Valence Electrons Most Reactive : _________________ 1 Valence Electron Which subatomic particle determines an elements identity? Protons What are the evidences of a chemical reaction? 1.Color Change 2. Production of Gas 3. Temperature Change 4. Precipitate What does it mean for an object to accelerate? -Change in speed -Change in direction What is the scientific law that explains why chemical equations must be BALANCED? Law of Conservation of Mass Name a physical and chemical property of wood. Physical: Floats on water, Rough texture, breaks when bent Chemical: ability to burn If you mix to solutions together and notice a temperature change, has a chemical reaction occurred? Yes When a chemical reaction has occurred has a new substance been created? Yes Chemical change means a new substance formed. Physical change means there has been no change to the original substance. (Torn paper is still paper) What is the Net Force for the following situation? 6N 12N 6N, Left 5-H 6-G 7-E 8-F When an object is acted on by an unbalanced force it will always. A.Accelerate B.Continue at the same speed C.Continue to go in the same direction D.Come to a stop Accelerate When a man jumps from a boat to a dock, the boat begins to move in the opposite direction of the dock. Which of Newtons laws is this an example of? Newtons 3 rd Law For every action, there is an equal and opposite reaction The boats moves in the opposite direction with an equal amount force that has been applied to it from the jump. What is the difference between Distance and Displacement? Displacement includes direction Associated with velocity When a bowl is pushed across a table, what force eventually stops the bowl from moving? Friction If a projectile flies north 387 meters in 5.8 seconds, what is its velocity? 66.72 m/s North If a 4500 kg car is traveling westward with an acceleration of 35.2 m/s 2, what is the force acting on it? 158,400 N F= m x a A dock worker needs to stop a crate containing 3 boxes of goods that is rolling across a manual conveyer belt. One box has a mass of 8.5kg and is accelerating at.75m/s 2. How much force will he need to apply to the crate in order to stop it? N The crate contains 3 boxes so you must multiply the mass of one box by 3 to get the mass of the entire crate. (3 x 8.5 kg= 25.5 kg) Use the formula f=m x a F= 25.5kg x 0.75 m/s 2 = N When you are riding in a car and you must come to a complete stop abruptly, why does you body continue to move forward? Because your body contains inertia. An object in motion tends to stay in motion unless acted on by on unbalanced force. Which of Newtons laws deals with a relationship between mass and force? Newtons Second Law F=m x a What 2 things are often found at plate boundaries? Earthquakes and Volcanoes Which geologic theory laid the foundation for the theory of Plate Tectonics? Continental Drift What movement is generally thought to have caused the Rocky Mountains? Collision of tectonic plates How do volcanoes form at mid-ocean ridges? As the tectonic plate moves apart, magma from the Earths mantle comes to the surface, building ridges and volcanoes Island Arcs are created by what type of boundary? Convergent Boundary What type of boundary creates Ocean Trenches? Convergent Boundary What type of Boundary can be found where Mid-Ocean Ridges are found? Divergent Boundary What types of evidence supported the idea of Pangea? Evidence Fossil Evidence Climate Evidence Land Features Puzzle-Fit What does Velocity include? Speed and Direction Ex. 3 m/s North If a car is traveling at a constant speed around a track, at what point would the car be accelerating? When the car changes direction If a biker is pedaling at 10 mi/hr north and decides to turn northeast still going 10 mi/hr, what has happened to his speed and velocity? Speed and velocity has changed Speed and velocity have stayed constant Speed has changed but velocity stayed constant Speed stayed constant but velocity changed If a rocket is moving 10 m/s and is pushed with a force of 5,000N will it continue to move at 10m/s? How will its speed be affected? No, it will move faster. The speed of the rocket will increase.