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physical science Q1
physical science
Question | Answer |
---|---|
physical science | The study of matter and energy. |
Mass | The amount of material an object has. |
Physics | The study of how energy acts with matter. |
Matter | Anything that has mass and takes up space. |
Chemistry | The study of matter and how it changes. |
Unit | A Known amount used for measuring |
Customary | Ordinary |
Metric System | System of measurement used by scientist |
meter | the basic unit of length in the metric system, it is about 39 inches Metric unit |
centimeter | 1/100 of a meter |
millimeter | 1/1000 of a meter |
meterstick | common tool for measuring length in the metric system |
kilometer | a metric unit of measure that is equal to 1,000 meters |
Area | the amount of surface an object has |
Exponent | a number that tells how many times a number is a factor |
gram | basic unit in the metric system |
kilogram | a unit that equals 1000 grams |
milligram | a unit that measures 1/1000 of a gram |
centigram | a unit that measures 1/100 of a gram |
cubic centimeter | a metric unit that means cm X cm X cm |
Property | characteristics that help identify an object |
atom | the building block of matter |
molecule | the smallest part of a substance that keeps the characteristics of that substance |
.solids | a form of matter that has a definite shape and volume |
liquids | a form of matter that has a definite volume but takes the shape of the container. |
gas | a form of matter that has no definite shape or volume |
Plasma | a very hot gas made of particles that have an electrical charge. |
states of matter | the form that matter has - solid, liquid and gas. |
Element | matter that has only one type of atom |
Compound | A substance that is formed when two or more elements join together |
proton | subatomic particle with a positive charge |
electron | subatomic particle with a negative charge |
neutron | subatomic particle that is neutral |
atomic number | number of protons in a specific element |
atomic mass | the number equals the sum of the protons and neutrons |
Symbol | one or two letters used to represent an element's name |
Periodic Table | an arrangements of elements by atomic number |
Isotope | an element that has a different number of neutrons than protons and electrons |
Deuterium | an isotope of hydrogen that has one proton and one neutron |
Tritium | an isotope of hydrogen that has one proton and 2 neutrons |
Family | a group of elements arranged with similar properties and in the same column |
metals | type of element; usually solid at room temperature, shiny and good conductor |
nonmetals | type of element with properties unlike metals |
noble gases | type of elements made up of gases that do not combine with other materials |
alloys | a mixture of 2 or more metals |
inert | lacking the power to move |
energy level | one of the spaces around the nucleus in which electron move |
Chemical Formula | Tells the kind of atom and how many of each kind are in a compound. |
Subscript | A number in the formula that tells how many parts are in the compound |
Radicals | A group of 2 or more atoms that act like 1 atom |
Binary compound | A compound with 2 elements |
acid | a compound that reacts with metals to produce hydrogen |
base | a compound that contains the OH radical |
pH | number that tells if an item is a base or acid |
motion | -a change in position |
speed | rate at which the position of an object changes |
distance | the length of the path between 2 positions |
constant speed | speed that does not change |