Term
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Definition
| _____ is the study of whaat substances are made of, and how one substance can be changed into another. |
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Definition
| _____is anything that takes up space and has mass. |
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Definition
| _____ is a measure of the pull of gravity on an object. |
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Term
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Definition
| true or false - Gravity pulls harde on objects that contain more matter. |
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Term
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Definition
| true or false - Weight of an object does not change no matter where you are, earth, moon, mars, etc. |
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Definition
| The amount of matter that makes up an object is called the object's _____. |
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Definition
| A metric unit called the _____ is used to measure an object's mass. |
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Term
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Definition
| _____ - amount of matter. |
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Definition
| _____- the space an object takes up. |
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Definition
| _____ is the amount of matter in one unit of volume. |
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Term
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Definition
| The two boxes demonstrate that if two objects have the same volume bu different densities, the object make of the denser substance weighs (more,less). |
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Term
1.of the same volume and different weights
2.of the same weight and different volumes. |
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Definition
| The two bricks show us that two objects made of material with different densities can either . . . . |
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Term
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Definition
| All matter is composed of tiny particles called _____. |
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Term
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Definition
| At the center of an atom is the dense core called the _____. |
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Definition
| One to over a hundred tiny particles called _____ swarm around the nucleus. |
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Term
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Definition
| The fast moving electrons are commonly described as an _____. |
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Term
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Definition
| What are the two particles that cluster and form the nucleus. |
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Term
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Definition
| An electric charge may be either ______ or ______. |
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Term
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Definition
| Oppossite charges _____, and like charges _____. |
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Term
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Definition
Protons are _____.
Electrons are _____. |
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Term
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Definition
| Anything lacking an electrical charge is said to be _____. |
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Term
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Definition
| The atom that has a single electron whirling about a single proton is the main building block of the substance called _____. |
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Term
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Definition
| Electrons in orbit at roughly the same distance from the nucleus are said to be the same _____. |
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Term
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Definition
| The number of protons in an atom are a very important and have been given a special name - _____ |
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Term
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Definition
| Substances that are composed of only one type of atom are called _____. |
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Term
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Definition
| Substances that are composed of more than one type of atom bonded together are _____. |
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Term
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Definition
| The Russian chemist who was the first to attempt to group the elements into families during the 1860s was _____. |
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Term
| periodic table of the elements |
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Definition
| After gathering all available infor abouth the elements known at the time and then making many attempst to arrange them, he construced what we call the _____. |
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Term
| three main groups of elements |
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Definition
| The blocks of color in the periodic table indicate the ________________. |
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Term
1.metals
2.nonmetals
3.semimetals |
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Definition
1._____-all elments in blue.
2._____-yellow ones
3._____-pink ones |
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Term
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Definition
| _____-these resemble metals in some respects and nonmetals in other respects. |
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Term
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Definition
| true or false - Nearly all metals are solids at room temperature. |
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Term
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Definition
| ______ is an exception to the most metals are solid. It is a silvery liquid that moves back and forthe along the thin tube inside some thermometers. |
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Term
Nickel
1.rechargeable batteries
2.a lining for tanks holding corrosive chemicals |
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Definition
| _____is a very hard metal and is important ingredient in stainless steel and what two other things? |
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Term
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Definition
| _____ is the densest of the everyday metals. |
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Term
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Definition
| _____ is the very first element in the periodic table for the nonmetals. |
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Term
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Definition
| _____ is a colorless and odorless gas at room tempeerature. It is difficult to detect. If in a jar, it would appear absolutely empty. |
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Term
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Definition
| _____ of the atmosphere is nitrogen, and about _____ is oxygen. |
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Term
Oxygen
1.ingredient of air
2.ingredient of water (H2O)
3.ingredient of most rocks and minerals |
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Definition
| _____is colorless and odorless element like hydrogen. It is the most abundant element because . . . |
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Term
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Definition
| Over _____ of our bodies consists of oxygen because we aare largely makd of carbon-hydrogen-oxygen compounds in a watery fluid. |
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Term
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Definition
| In its elemental state, _____has several different forms. |
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Term
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Definition
| _____is also a basic building block of the somplex compounds found in your body and in all living organisms. |
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Term
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Definition
| Because the element _____ has characteristics of both metals and nonmetals, it is considered a _____. |
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Term
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Definition
| Silicon in pure form is used to make _____, the tiny "brains" of computers and other electronic divices. |
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Term
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Definition
| The seventh column of the periodic table contains the family of elements known as the _____. |
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Term
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Definition
| The halogen _____ has a variety of uses. |
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Term
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Definition
| A form of fluorine known as _____ strengthens tooth enamel and is added to what to prevent tooth decay, particularly in children. |
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Term
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Definition
| The most widely used halogen is undoubtedly _____. |
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Term
Bleaches
1. remove stains
2.disinfectants |
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Definition
| _____containing chlorine compounds sodium hypochloriet, NsOCI, are often used to do what 2 things? |
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Term
iodine
When heated, it sublimes. |
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Definition
| _____is the first solid you see as you look down the halogen colums in the periodic table. It has a strange property setting it apart from most other solids, what is it? |
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Term
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Definition
| _____ instead of melting, the crystals turn directly into a gas. |
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Term
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Definition
| You may have noticed the word _____ on a box of table salt. Keeps iodine in you diet. |
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Term
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Definition
| All the naturally occurring elements in the last column of the periodic table are gases. They are called _____ because they do not , except under very unusual circumstances, combine with anything else. |
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Term
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Definition
| A _____ is a tiny group of two or more atoms that are bonded tightly together. |
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Term
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Definition
| Substance that are composed of more than one type of atom bonded together are called _____. |
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Term
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Definition
| compounds composed of individual molecules are called _____. |
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Term
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Definition
| Because charged atoms are called ions, compounds composed of charged atoms or groups of atoms are called _____. |
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Term
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Definition
| Charged atoms aare called _____. |
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Term
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Definition
| The hardest of all known substances is the _____. |
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Term
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Definition
| A process in which atoms of elements or compounds are rearranged to form new substances. ex. vinegar and baking soda mixed |
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Definition
| _____ is the chemical reaction that is burning. |
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