Unit 1: Chapter 1- Biology
Terms in this set (45)
What are the goals of science?
To provide natural explanations for events in the natural world.
Is an organized way of gathering and analyzing evidence about the natural world.
Science deals only with
The natural world
Scientists propose explanations that are based on ________________, not belief.
Then they test those explanations with more ___________________.
The physical universe is a system composed of _____________ and processes that interact.
The physical universe is a system composed of parts and ___________________ that interact.
One goal of science is to ______________________________ for events in the natural world.
Provide natural explanations
Scientific methodology involves
Observing and asking questions, making inferences and forming hypotheses, conducting controlled experiments, collecting and analyzing data, and drawing conclusions.
Scientific investigations begin with _______________________ the act of noticing and describing events or processes in a careful, orderly way.
After posing questions, scientists use further observations to make _______________________ or logical interpretations based on what is already known.
Inference can lead to a ______________________ or a scientific explanation for a set of observations that can be tested in ways that support or reject it.
Whenever possible, a hypothesis should be tested by an experiment in which only one variable is changed. All other variables should be kept unchanged, or controlled. This type of experiment is called a ___________________________.
The variable that is deliberately changed is called the _______________________ (also called the manipulated variable).
The variable that is observed and that changes in response to the independent variable is called the ______________________ (also called the responding variable).
A ________________________ is exposed to the same conditions as the experimental group except for one independent variable.
_________________________ are numbers obtained by counting or measuring.
_________________________ are descriptive and involve characteristics that cannot usually be counted.
What scientific attitudes help generate new ideas?
Curiosity, skepticism, open-mindedness, and creativity help scientists
_______________________________, ______________________________, and society are closely linked.
Why is peer review important?
Publishing peer-reviewed articles in scientific journals allows researchers to share ideas and to test and evaluate each other's work
In peer review, scientific papers are reviewed by ___________________________, __________________________________ experts.
What is a scientific theory?
A well-tested explanation that unifies a broad range of observations and hypotheses and that enables scientists to make accurate predictions about new situations.
Evidence from many scientific studies may support several related hypotheses in a way that inspires researchers to propose a scientific _____________________________ that ties those hypotheses together.
What is the relationship between science and society?
Using science involves understanding its context in society and its limitations.
When scientists explain "why" something happens, their explanation involves only _________________________________________________. Pure science does not include ethical or moral viewpoints.
The way that science is applied in society can be affected by ________________________, which is a particular preference or point of view that is personal, rather than scientific.
Scientists __________________________________________ about big public policy decisions, but it is the voting citizens who influence public policy by casting ballots.
What characteristics do all living things share?
Made up of cells, have a universal genetic code, obtain and use energy, grow and develop, reproduce, respond to the environment, maintain a stable internal environment and change over time.
The study of life
Living things are
Based on a universal code
All organisms store the complex information they need to live, grow, and reproduce in a genetic code written in a molecule called ______________
A single fertilized egg divides again and again
Is a signal to which an organism responds
Most plants and animals engage in ________________________, in which cells from two parents unite to form the first cell of a new organism.
Other organisms reproduce through __________________________, in which a single organism produces offspring identical to itself.
This condition process is called ______________________.
The combination of chemical reactions through which an organism builds up or breaks down materials is called
Living things are made up of one or more cells
Which are the smallest units considered alive
The central themes of biology are
The cellular basis of life; information and heredity; matter and energy; growth, development, and reproduction; homeostasis; evolution; structure and function; unity and diversity of life; interdependence in nature; and science as a way of knowing.
Many living things consist of only a single cell and are called
All forms of life on Earth are connected into a ___________________ or "living planet."
Life on Earth is shaped by
Weather patterns and processes in the atmosphere
Global ecological studies are enabling us to learn about our
The field of biotechnology is based on
Our ability to "edit" and rewrite the genetic code
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