What Do Scientists Do?
- Scientists collect data and develop
theories, models and laws about how nature works
- What is a hypothesis?
Answer: A hypothesis is an
educated guess about what the answer to a question may be. The process of
developing a hypothesis is guided by experience and knowledge and should be
a statement of cause and effect that can be tested. A theory is a set of
- What is the role of hypotheses in
Answer: Hypotheses are
essential in science. It is through using hypotheses, theory, research
questions and the rigorous process of the scientific method that science can
continue to advance.
a well-substantiated explanation of some aspect of the natural world that is
acquired through the scientific method and repeatedly tested and confirmed
through observation and experimentation
- What is a model?
Answer: Scientific modeling
is a scientific activity, the aim of which is to make a particular part or
feature of the world easier to understand, define, quantify, visualize, or
simulate. It requires selecting and identifying relevant aspects of a
situation in the real world and then using different types of models for
different aims, such as conceptual models to better understand, mathematical
models to quantify, and graphical models to visualize the subject. Modeling
is an essential and inseparable part of scientific activity, and many
scientific disciplines have their own ideas about specific types of
- What is the relationship between
hypotheses and models?
Answer: Hypotheses of
specific observations and experiments allow the development of more
generalized models to predict what will happen in some other place and time.
- What is a scientific law?
a statement based on repeated experimental observations that describes some
aspects of the universe. A scientific law always applies under the same
conditions, and implies that there is a causal relationship involving its
Scientific Law vs. Theory: a
law describes what nature does under certain conditions, and will predict
what will happen as long as those conditions are met. A theory explains how
nature works in a more general sense.
- Big Bang Theory: A
general statement of the origin of the universe.
- Hubble's Law of Cosmic
Expansion: provides a
concise method for measuring a galaxy's velocity in relation to our own.
The Scientific Method
- Science is a search for order in
- Scientific theories and laws are
the most important results of science
- Scientific theory
- Widely tested
- Supported by extensive
- Accepted by most scientists in
a particular area