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31 Cards in this Set
- Front
- Back
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What is a chemical reaction |
The production of a new substances from existing substances |
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What are the signs that a chemical reaction has occurred |
formation of gas, formation of precipitate, liberation or absorption of heat, light, or some form of energy and/or distinct change in color |
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Write a word equation for the hydrogen and oxygen gases producing water |
Hydrogen + Oxygen --> Water |
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Write a chemical symbol equations for hydrogen and oxygen gases producing water |
Hˇ2 + O --> Hˇ2O |
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Define the term reactant |
A substance that undergoes a change in a reaction |
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Define the term product |
The substances that result from a reaction
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What's the law of conservation of mass |
The Law of the conservation of mass states that what goes into a reaction must come out meaning that the mass of the reactants equal the mass of the products |
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what is a neutralization reaction |
when an acid and a base react to create salt and water |
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write the word and chemical equation for photo synthesis |
Carbon dioxide + water --> glucose + oxygen 6COˇ2 + 6Hˇ2O --> Cˇ6Hˇ12Oˇ6 + 6Oˇ2 |
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write the word and chemical equation for respiration |
glucose + oxygen --> carbon dioxide + water + energy (stored in the ATP) Cˇ6Hˇ12Oˇ6 + 6Oˇ2 --> 6COˇ2 + 6Hˇ2O + ATP |
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what is a metal-acid
reaction |
Acid and metal reacts to create salt and hydrogen |
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what is a corrosion reaction |
When a metal and oxygen react over time to create a metal oxide or more commonly know as rust |
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How do you work out average speed |
you divide the the distance by the time it takes. |
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Define acceleration |
The rate of the change in speed |
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Define inertia |
The tendency for an object to stay in motion |
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State Newtons 1st law and give an example |
The law of Inertia e.g. when a car is moving and suddenly stops the passengers inside will want to keep moving. |
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State Newtons 2nd law and give an example |
Acceleration of an object is directly proportional to the force acting on it and is inversely related to the mass of the object or F =ma for short. E.g. you can kick a ball and it moves because you have enough force to move that light object but you cannot kick a brick wall |
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State Newtons 3rd law and give an example |
Every reaction has an equal and opposite reaction. E.g. when air comes out of a balloon it has a force that is equal to the force of the balloon moving. |
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how do you convert m/s to km/hr |
You time it by 3.6 and divide for reverse. |
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What do you need to include in a graph |
Labeling everything (including the graph it self [title]), use the right size of the numbers for scaling and have them increase in equal amounts also use crosses as your points. |
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How can you reduce friction |
By smoothing surfaces that would have frictions and using things like ball bearings in certain cases to make it smoother still |
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What is a precipitation reaction |
When a soluble salt reacts with another soluble salt and creates an insoluble salt and a soluble salt. |
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What is a acid carbonate reaction |
Acid and a metal carbonate react to create salt, water and carbon dioxide |
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What is the double helix |
a pair of parallel helices intertwined about a common axis, especially that in the structure of the DNA molecule. |
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Define gene |
A section of a DNA molecule that contains information for one specific characteristic |
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What are examples of mutations |
Cru Di Chat syndrome, Sickle cell disease and down syndrome |
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What are examples of mutagens |
x-ray, gamma rays, neutrons, and certain chemicals such as carcinogens |
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What is genetic inheritance |
The passing down of ones genes to offspring |
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Define pedigree |
Pure-breed in animals and your linage in humans |
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How is gene technology helping medicine |
By genetically modifying genes to find how mutations are made to find cures and ways to stop them in the first place |
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What is DNA profiling |
Using ones DNA to identify them, a bit like finger scanning |
