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9th: Science ExamQ1

QuestionAnswer
These are usually quantitative and are based on math Scientific laws
Theory that says all particles are constantly moving Kinetic Theory
Tool used to measure mass Balance
Particles found outside of the nucleus electrons
these do not have to combine in the same amount every time mixtures
The ability to dissolve solubility
type of graph that is used for something that has occurred over a period of time line graph
prefix meaning 1000 kilo
property that means heat and electricity can move through it well conductivity
the curved surface of a liquid in a graduated cylinder meniscus
The atomic______ tells us how many protons and electrons an atom has number
A liquid changes to a solid at the freezing point
has mass and takes up space matter
melting ice is a ______ change physical
has a definite shape and volume solid
burning wood is a _____ change chemical
the _____point is the temperature where a solid changes to a liquid melting point
law that states as the volume decreases the pressure increases Boyles law
when you put things together according to how they are alike classifying
means it can be bent and shaped malleable
the study of energy and how it makes matter behave physics
the opposite of evaporation condensation
subatomic particle with no charge neutron
A chemical property reactivity
The most common phase of matter in the universe plasma
the center of an atom nucleus
unit of length in the metric system meter
subatomic particle with a positive charge proton
the amount of matter in an object mass
has a definite volume but no definite shape liquid
mass divided by volume formula for denisty
this means explained in words qualitative
a liquid changed into a gas evaporation
shorthand for an element symbol
saltwater is a _________ mixture homogeneous mixture
smallest amount of a substance atom
this can be tested by doing an experiment hypothesis
system of measure used in science metric system
the amount of space an object occupies volume
atoms of the same element with different numbers of neutrons isotopes
the variable in an experiment that you choose to change manipulated variable
types of experiments we do in school controlled experiments
the instrument we use to measure liquid volume graduated cylindar
units for the mass of atom amu
2 or more elements chemically combined compound
unit of mass grams
has no definite shape or volume gas
a system of knowledge and the methods you use to find that knowledge science
what are the two branches of science (in general) natural sciences and social sciences
To understand how nature behaves ex. earth science, botany, biology, zoology, geology, anatomy etc. natural science
deals with human behavior ex. psychology, sociology, etc. social sciences
Which branch does physical science belong in? Natural Science!
The study of matter and energy Physical Science
What are the two branches of physical science? Chemistry and Physics
(applied science) The use of knowledge to solve practical problems technology
science and technology are... interpendent
using your senses this is the most DIRECT way to gain knowledge of something observe
when you put things together according to how they are alike in some way classify
What two things does a measurement need to be correct? a number and a unit
when exact numbers are not needed or impossible estimate
when you suggest an explanation for an observation ex. lab safety signs infer
a statement that can be tested (an educated guess) to hypothesize
we do this to test a hypothesis experiment
tables and graphs are used to.... organize (data)
looking for trends in your data analyze
when you say that you think something might happen what are you doing? predicting
an organized plan for gathering organizing and communicating information, the goal of any scientific method is to solve a problem or to better understand an observed event the scientific method
Steps to the scientific method: 1. Observe something in nature 2. Ask questions and do research 3. Form a hypothesis 4.Test a hypothesis by doing an experiment 5. Draw a conclusion
True or False: If a hypothesis doesn't turn out the way you want it too it is a failure. False! No hypothesizes are failures they are learning lessons!
a variable that causes change in another manipulated variable
the variable that changes in response to the manipulated variable responding variable
Where only one variable is changed at a time is a controlled experiment
Are theories considered qualitative or quanitative? qualitative!
What unit does a triple beam balance measure? Grams
What unit does a graduated cylinder measure? Liters
What unit does a meter stick measure? Meters
A way of writing very large or very small numbers to make them easier to work with Scientific Notation
The simplest way to organize your data. This table relates at least two variables together Data Tables
A graph that compares a part of something to the whole thing (100%) Circle Graphs
A graph that is used to compare different categories to each other. Bar Graphs
All graphs should contain: 1. Title 2. Labeled Axis (x,y) 3.Scale of Numbers
made up of only one kind of atom and cannot be broken down into simpler substances elements
shows how many atoms of each element are in a unit of a substance Chemical Formula
After the elements symbol the number of atoms is written as a ______ subscript
What is chemically combined, must be separated chemically components do not retain their original properties they change into something really different components must combine in the same amount every time Pure Substances
Components must combine in the same amount every time is called the Law of Definite Proportions
These are physically combined can be separated physically components must retain their original properties and components don't have to combine in the same amount every time Mixtures
The substances are evenly distributed and it looks the same throughout homogeneous mixtures
These substances are not evenly distributed and does not look the same throughout you can easily see different parts that make it up heterogeneous mixtures
any characteristic of a material that can be observed or measured without changing the composition of the substances in the material, Physical Property
Examples of physical properties: color, shape, mass, density, solubility, odor, boiling point, freezing point, age, weight melting point, malleability, and etc.
Any ability to produce change in the composition of matter chemical properties can be observed only when the substances in a sample of matter are changing into different substances. Chemical Property
Examples of Chemical Properties: Reactivity and Flammability
When some of the properties of a material change, but the substances in the material remain the same some physical changes can be reversed and some cannot be reversed. Physical Change
When a substance undergoes a chemical reaction and forms one or more new substances Chemical Change
The amount of force that the particles of a gas strike the walls of their container pressure
at a constant pressure the temperature of a gas the volume of that gas also increases (this is a direct relationship) Charles's Law
a reversible physical change that occurs when a substance from one state of matter to another phase change
when a liquid changes into a gas boiling point
at what temperature does water boil? 100 degrees
when a solid turns into a liquid melting point
when a liquid changes into a solid freezing point
the process of a substance changing from a solid directly into a gas and skipping the liquid phase sublimation
the process of a substance changing from a gas directly into a solid and skipping the liquid phase deposition
True or False: during a phase change the temperature of the substance remains the same even if heat is being added or taken away True!
True or False: The melting and freezing point of a substance is the same temperature it just depends on whether you are adding heat or taking it away True!
King Kilo
Henry Hecto
Does Deka
Usually Unit: grams meters, etc.
Drink Deci
Chocolate Centi
Milk Milli
Created by: junethebandkid
 

 



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