Chemistry Ch. 1
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Atoms combine to form? | molecules
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| Scientific laws describes... | HOW nature behaves
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| A scientific law can be proven... | over and over
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| A good hypothesis is ____meaning it makes predictions that can be confirmed or refuted by further explanations. | falsifiable
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| The Law of Conservation of Mass states: | matter is neither created or destroyed
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| We call a specific instance of matter a ___ | substance
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| What are the characteristics of a solid? | fixed volume, tightly packed and rigid shape
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| A pure substance is either an ___ or ___ | element or compound
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| A mixture is | 2 or more substances that are not chemically combined
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| An element is a substance that | cannot be broken down into anything simpler
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| What is a compound? | 2 or more chemically combined elements
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| When the mixture looks the same throughout, this is called a ____ | homogeneous mixture
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| A heterogeneous mixture is a mixture that____ | looks different throughout (you can see the different particles)
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| What is decanting? | separating a solid from a liquid by carefully pouring off liquid
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| Volatile means ____ | easy vaporizable
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| Matter can be broken down into what 2 categories? | A pure substance and mixture
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| A mixture can be ____ or _____ | homogeneous / hertergoneous
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| A property that changes when the size of the sample changes is a ____. | extensive property
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| Examples of an extensive property are: | mass, volume and length
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| An intensive property: | doesn't change when you take away some of the sample
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| Temperature, color, hardness, melting point, and density are examples of an ___ property | intensive property
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| Pouring a mixture through a filter paper to separate the solid from the liquid is called___ | fifltration
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| Distillation is a process where ___ | liquids are boiled offf
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| Unit for length: | meter (m)
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| Unit for mass: | kilogram (kg)
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| Unit for time: | second
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| Unit for amount of subtsance: | mole (mol)
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| With a physical change, the ___ changes, the substance does not | appearance
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| In a chemical change, the ____ change | substance
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| How close a particular measurement is to the correct value is the ____ | accuracy
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| Precision is: | the consistency of repeated measurement
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| The more consistent the results, the more ____ the measurement is | precise
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| Numbers are not significant when: | 1. they are leading zeros 2. zeros at the end of a number doesn't have a decimal point
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| The more digits, the __ certainty | more
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| The less digits, the __ certainty | less
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| Numbers that have NO certainty are called: | exact numbers
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| An error that tends to be too high or too low are called: | systematic errors
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| given unit x desired unit/given unit = | desired unit
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
Mariahj25
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