List the steps of the scientific method. List characteristics of life. What is the difference between growth and development? Place the following terms in order of least to most highly organized: tissue, atom, cell, organ system, molecule, organism, organ, biosphere, population, ecosystem, community
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List the steps of the scientific method. List characteristics of life. What is the difference between growth and development? Place the following terms.
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List the steps of the scientific method.
List characteristics of life.
What is the difference between growth and development?
Place the following terms in order of least to most highly organized:
tissue, atom, cell, organ system, molecule, organism, organ, biosphere, population, ecosystem, community
The Scientific Process
• MAKE OBSERVATIONS• FORM QUESTIONS BASED ON
OBSERVATIONS• FORMULATE A HYPOTHESIS• TEST HYPOTHESIS - REPEAT TESTS• ANALYZE RESULTS• CONCLUSION
Characteristics of Life (textbook pp 16-20):
1. Living Things are Composed of Cells: Single-cell organisms have everything they need to be self-sufficient. In multicellular organisms, specialization increases until some cells do only certain things.
2. Living things have Levels of Organization and they are highly organized:
•Both molecular and cellular organization.
•Living things must be able to organize simple substances into complex ones.
•Living things organize cells at several levels:
• Tissue - a group of cells that perform a common function. •Organ - a group of tissues that perform a common function. •Organ system - a group of organs that perform a common function.
(p. 21 in textbook)
Living Things Obtain and Use Energy:•Living things take in energy and use it for maintenance and growth.
Living Things Grow and Develop:
•Cell division - the orderly formation of new cells. •Cell enlargement - the increase in size of a cell. •Cells grow to a certain size and then divide. •An organism gets larger as the number of its cells increases.
Development – change in form or function
Living Things Reproduce:
•All living things reproduce in one of the following ways: • Asexual repoduction - Producing offspring without the
use of gametes.
• Sexual reproduction - Producing offspring by the joining of sex cells.
•Reproduction is not essential for the survival of individual organisms, but must occur for a species to survive.
Contain DNA/RNA
Living Things Adapt To Their Environment: Adaptations are traits giving an organism an advantage in a certain environment. Variation of individuals is important for a healthy species.
Living things react to a stimuli
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Maintain homeostasis
The Scientific Process
• MAKE OBSERVATIONS• FORM QUESTIONS BASED ON
OBSERVATIONS• FORMULATE A HYPOTHESIS• TEST HYPOTHESIS - REPEAT TESTS• ANALYZE RESULTS• CONCLUSION
THEORY PRINCIPLE
Set of ideas that form a general frame of reference for further study
Explanations have high probability of being valid
Evidence is so over- whelming that the explanation is further elevated
fundamental doctrine on which other concepts are based objectivity
WHAT IS A HYPOTHESIS?
• A tentative explanation• To be scientific must be testable• Constructed to provide framework for stating
the results of an experiment• Must be more specific than problem