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| A brief statement that summarizes paswt observations and predicts future ones. |
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| A tentative interpretation or explanation of the observations. |
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| One or more well-established hypothesis that is a model for the way nature is and tries to explain not merely what nature does, but why. |
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| The way research is done, it starts with an observation then to a hypothesis, then experimental test, and can lead to scientific laws or theories if the same results are produce from similar experiments. |
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| What are the states of matter? |
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Definition
| Solid, liquid, gas, and aqueous. |
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| What are elements? What are compounds? |
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Definition
| Elements are substances that cannot be broken down into simplier substances. Compounds are a substance composed of two or more elements in fixed, definite proportions. |
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| What is a homogeneous mixture? What is a heterogeneous mixture? |
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Definition
| Homogeneous mixtures have the same composition throughout the mixture. Heterogenous mixtures have different composition throughout the mixture. |
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| What are chemical properties? What are physical properties? |
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Definition
| Chemical properties are properties displayed only by changing its composition via chemical change. Physical property is one that a substance displays without changing its composition. |
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| What is a chemical change? What is a physical change? |
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Definition
| Chemical change are changes that alter the composition of matter. Physical change are changes that only change that alter the state or appearance of the object, not the composition. |
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| Name the diatomic elements |
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Definition
Bromide, oxygen, fluorine, iodine, nitrogen, chlorine, hydrogen
(BrOFINCH) |
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| What is the difference between accuracy and precision? |
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Definition
| Accuracy is how close the results are to what is given as the expected result. Precision is how close the results are to each other. |
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| Define the law of definite proportion. |
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Definition
| All samples of a given compound, regardless of their source or how they were prepared, have the same proportions of their constituent elements. |
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Term
| Define the Law of Multiple Proportion. |
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Definition
| When two elements form two different compounds, the masses of the element B that combine with 1g of the element A can be expressed as a ratio of a small whole number. |
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| Define the Law of Conservation of Mass. |
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Definition
| When a chemical reaction takes place, the total mass of the substance involved in the reaction does not change. |
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| Define the Law of Conservation of Energy |
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Definition
| Energy is neither created nor destroyed, however it can change form (from potential to thermal) |
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| The number of protons is defined as... |
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Definition
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| The number of neutrons in an element is given by.. |
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Definition
| subtracting the number of protons from the mass number |
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| The number of electrons is equal to... |
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Definition
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