biology;1.3; Scientific Theories
What is a scientific law?
A descriptive generalization about how some aspect of the natural world behaves under stated circumstances. (what will happen)
What is a hypothesis?
A hypothesis is a statement that can be tested EX: Drinking sugary drinks daily leads to obesity
the National Academy of Sciences definition of ''theory'
In science, a well-substantiated explanation of some aspect of the natural world that can incorporate facts, laws, inferences, and tested hypotheses. (why something happens)
What is germ theory?
Microorganisms (germs, pathogens) are the cause of many diseases through infection.
What is the cell theory?
The cell is the smallest unit of structure and function of all living organisms, all living organisms are made up of at least one cell, and living cells always come from other living cells.
What is the theory of evolution?
The theory of evolution by natural selection explains how living things are changing today and how modern living things have descended from ancient life forms that no longer exist on Earth. CERTAIN TRAITS/ADAPTATIONS PASSED DOWN THROUGH NATURAL SELECTION: CHANGES THE OVERALL TRAITS OF SPECIES
the meaning of the statement, ''theories are the bedrock of our understanding of nature''.
Theories help us explain how nature and the universe work
What is a theory?
Theory is NOT OPINION. It's NOT A GUESS It is ACCEPTED AS SCIENTIFIC TRUTH. It is supported by evidence collected by many scientists. (explains why something happens)
What is natural selection?
Those who have adaptations who help them survive longest reproduce more and pass down traits to offspring
what is the difference between a theory and a hypothesis?
With repeated testing, some hypotheses may eventually become scientific theories. A scientific theory is a broad explanation for events that is widely accepted as true. To become a theory, a hypothesis must be tested over and over again, and it must be supported by a great deal of evidence. ALL THEORIES BEGAN AS A HYPOTHESIS
You've made the following hypothesis: Hypothesis; "More pine seeds germinate after a forest fire" The most valid and reliable test of your hypothesis would include an experimental group of pine seeds that was recovered from a fire area and pine seeds that were____ a. found before a fire b. tolerant of fire c. placed in a fire d. germinated after a fire (q)
a
What is a paradim shift?
a change in approach to the fundamentals of a science
What is the driving force of the evolutionary process? a. artificial selection b. natural selection c. disease spread d. homeostatic imbalance (q)
b
How do hypotheses become scientific theories? a. society believes the ideas are correct b. a scientist pays a review board to accept their work c. repeated testing from different scientists confirms the findings d. the findings of a scientist receive the most 'up votes' during the first year they publish their work (q)
c
Which scientific theory tells us that microorganisms like viruses cause many diseases? a. evolutionary theory b. cell theory c. germ theory d. atomic theory (q)
c
Theories must have NO contradicting ___________
evidence