Studied by 2 people
Hypothesis
________- A tentative explanation that has been tested.
Composition
________- What something is made of.
Structure
________- What something is made of and how the components are arranged.
Homogenous
________- components mix evenly.
Compounds
________- Composed of more than one element; bound in fixed ratios.
Heterogenous
________- component do not mix evenly.
Paradigm
________- A way of thinking about a topic.
Chemistry
________- The study of matter and its changes.
Mixtures
________ can be- separated into their components without changing the identity of the substance, unlike compounds.
Theory
________- Idea supported by experimental evidence, or a paradigm.
Exothermic change
________- Releases heat energy.
Elements
________ combine to form new substances- A chemical change.
Molecules
________- Groups of atoms that bind tightly together, and behave as a single unit.
Alloys
________- mixtures of metals.
Liquid
________- Definite volume, but no definite shape.
Endothermic change
________- Absorbs heat energy.
Physical properties
________- Can be measured without changing the identity of the substance.
Chemical properties
________- Can NOT be measured without changing the identity of the substances.
Pure substances
________- Composed of one element or one compound ONLY.
Scientific law
________- A statement that describes observations that are widely varying circumstances.
Matter
________- Anything that has mass and takes up volume.
Atom
________- The fundamental unit of matter.
Energy
________- the ability to do work.
Element
________- Made of only one type of atom.
Mixtures
________- contain more than one substance, not bound in a fixed ratio.
Chemistry
The study of matter and its changes
Matter
Anything that has mass and takes up volume
Composition
What something is made of
Structure
What something is made of and how the components are arranged
Atom
The fundamental unit of matter
Element
Made of only one type of atom
Compounds
Composed of more than one element; bound in fixed ratios
Molecules
Groups of atoms that bind tightly together, and behave as a single unit
Diatomic molecules
an element bound to another of itself
Pure substances
Composed of one element or one compound ONLY
Mixtures
contain more than one substance, not bound in a fixed ratio
Alloys
mixtures of metals
Mixtures can be
separated into their components without changing the identity of the substance, unlike compounds
Matter
Pure Substances vs. Mixtures
Pure Substances
Elements (Gold) vs Compounds (Water)
Mixtures
Homogenous (Air) vs. Heterogenous (Salt and Water)
Solid
Definite volume and shape
Liquid
Definite volume, but no definite shape
Gas
No definite anything
Physical properties
Can be measured without changing the identity of the substance
Physical changes
Dont change the identity of the substance
Chemical properties
Can NOT be measured without changing the identity of the substances
Chemical changes
Change the identity of the substances
Energy
the ability to do work
Potential energy
Stored energy
Kinetic energy
Energy of motion
Heat energy
Involved kinetic energy of the particles in a substance
High energy
brings changes
Stable
no reaction
Exothermic change
Releases heat energy
Endothermic change
Absorbs heat energy
Hypothesis
A tentative explanation that has been tested
Theory
Idea supported by experimental evidence, or a paradigm
Paradigm
A way of thinking about a topic
Scientific law
A statement that describes observations that are widely varying circumstances
Note
Flashcard