Physical science Chapter 1 Flashcards
Matter
Anything that mass and takes up space
Anything that has mass and takes up space
Matter
The study of matter and how matter changes
Chemistry
Single kind of matter that is pure meaning it always ha stage came composition
Substance
What properties describe matter
Physical and chemical properties
Physical properties
Characteristics of a substance that can be observed without changing it into another substance
Characteristics of a substance that describes its ability to change into different substances
Chemical properties
Examples of physical properties
Melting, freezing, dissolving, color, size
What type of property is flammability
Chemical property bc it describes an ability to turn into a different substance
Paper+fire–> ash
What is matter made of?
All matter is made up of over 100 substances called elements
Substance that can not be broken down into other substances by chemical or physical means
Elements
How can you tell one element from another?
Each element can be identified by its specific physical and chemical property
Basic particle from which all elements are made
Atom
Force of attraction between two or more atoms
Chemical bonds
Group of two or more atoms held together by chemical bonds
Molecule
Substance made of two or more elements that are chemically combined in a set ratio
Compound
Shows the elements in the compound and the ratio of atoms
Chemical formula
When elements combine they form compounds with the same or different properties from the elements it came from
When elements combine Different properties are formed then the ones that each element had before
What are the types of mixtures
Heterogeneous or homogeneous
Made of two or more substances that are together in the same place but their atoms are not chemically bonded
Mixture
Heterogeneous mixture
Mixture in which u can visibly see the parts of the mixture and is separable
Homogeneous
Mix so evenly different parts are not seen
Methods of separating mixture
Distillation evaporation filtration and magnetic attraction
Measure of the force of gravity
Weight
The amount of matter in an object
Mass
To measure the properties of matter scientist use a system called
International system of units
SI unit of mass
Kilogram
Amount of space that matter occupies
Volume
How do you calculate volume
Length x Width x height
Measure of the mass of a material in a given volume
Density
How do you calculate density
Mass/volume
Objects with greater densities than water will sink
Objects with lesser densities will float
Alters the form or appearance of matter or appearance of matter but does not turn any substance in the matter into a different substance
Physical change
What happens to a substance in a physical change
A substance that that undergoes a physical change is still the same substance after the change
Chemical change
Change in matter that produces one or more new substances
Law of conservation of mass
Matter can not be created or destroyed
How are changes in energy and matter related?
Every Chemical and physical change in the matter includes a change in energy
Measure of how hot or cold something is
Temperature
Total energy of motion of all the particles in an object
Thermal energy
Change in which energy is absorbed
Endothermic change
A change in which energy is released
Exothermic change
Energy stored in the chemical bonds between atoms
Chemical energy
