science
a system of knowledge and the methods you use to find that knowledge
science discovery
_______ begins with curiosity and often ends with _______
technology
the use of knowledge to solve practical problems
interdependent
science and technology are _______. advances in one lead to advances in the other.
physical earth space life
natural science is divided into three branches: _______ science, _______ and ________ science, and ________ science.
natural
_______ science is divided into 3 branches: physical science, earth and space science, and life science
chemistry
the study of the composition, structure, properties, and reactions of matter.
physics
the study of matter and energy and the interactions between the two through forces and motion
geology
the study of the origin, history, and structure of earth
astronomy
the study of the universe beyond Earth, including the sun, moon, planets, and stars
biology
the study of living things (life science)
scientific method
an organized plan for gathering, organizing, and communication information
problem
the goal of any scientific method is to solve a ______ or to better understand an observed event
observation
information that you obtain through your senses
hypothesis
proposed answer to a question
manipulated variable
the variable that causes a change in another
responding variable
the variable that changes in response to the manipulated variable
controlled experiment
an experiment in which only one variable (the manipulated variable) is changed at a time
scientific theory
a well-tested explanation for a set of observations or experimental results
theory
a scientific _______ is never proved, but becomes stronger if facts continue to support them.
scientific law
a statement that summarizes a pattern found in nature, without attempting to explain it (a scientific theory explains it)
model
representation of an object or event
models
scientific _______ make it easier to understand things that might be too difficult to observe directly
scientific notation
a way of expressing a value as the product of a number between 1 and 10 and a power of 10.
scientific notation
makes very large or very small numbers easier to work with
international system of units
SI stands for _______ _______ __ _______
length
the straight line distance between two points
mass
the quantity of matter in an object or sample
volume
the amount of space taken up by an object
density
the ratio of an objects mass to its volume
conversion factor
a ratio of equivalent measurements that is used to convert a quantity expressed in one unit to another unit.
precision
a gauge of how exact a measurement
precision
the precision of a calculated answer is limited by the least precise measurement used in the calculation
accuracy
the closeness of a measurement to the actual value of what is being measured