Lessons 3-5 Ch 1 Flashcards
Careful; systematic; data
Scientists make ______ and ______ observations and record those as ____
A hypothesis is a possible answer to a question and they test it and record the data from the experiment
Describe what a hypothesis is and how what scientists do once they make one
You use your five senses and other tools to describe surroundings
Describe the observing stage of the scientific method
Answers a scientific question and is specific and testable
Describe how what a good hypothesis is
Use your observations to run an experiment
Describe what you do to test your experiment
Qualitative and quantitative
Name the two types of data
Quantitative data
Data using values or measurements
Qualitative data
Describing situations or observations with sensory words
Non-significant data
Data that has no effect
Statistically significant data
Data also has no effect due to chance
A new hypothesis
What does rejection of a hypothesis lead to
Independent variable
The variable being manipulated or changed in an experiment
Dependent variable
Variable that is observed and measured and changes based on independent
Constant variables
Variable that are kept the same
They explain a wide range of observations and experiments
What do theories explain
A wide range of scientific evidence
What supports theories
No, never because new information is constantly being found
Are theories ever proven? Why or why not?
Scientific journals- with results and conclusions and experimental methodical data
Name two examples of primary sources for theories
Magazine articles, textbook, and news reports
Name examples of secondary sources
Accuracy and Precision
What are the two main things you look for when making measurements
Accuracy
How accurate a measurement is to a value
Precision
The exactness of a measurement
An enlarged image of the object
What do microscopes provide
Light microscope
LEM; shows two-dimensional images of specimens; in color; uses light to enlarge image
Scanning electron microscope
Three-dimensional surface of specimen; uses electrons to enlarge image; SEM
Transmission electron microscope
TEM; two dimensional specimen; shows it as a thin slice; uses electrons to enlarge
X-RAY images
Light rays that pass through tissue and is absorbed by teeth and bones
MRI
Shows a cross section of your body
MRI and X-Ray
Two examples of imaging technology
They are used to study systems that can’t be studied directly
What is the purpose of computer models?
heart attacks; effect of medicines on the human body; movement of water molecules in and out of cells; spread of disease through a population
Give examples of things studied with computer models
Segment of DNA that stores genetic information
Gene
Molecular genetics
A study and manipulation of DNA on a molecular level
Genomics
Study and comparison of genes both within and across a species
Food allergies; potential effects of obesity; cancer; effects of tobacco, alcohol, and other drugs
Name examples of how biology helps you understand your health
Interactions in ecosystems; pollution; and biodiversity
Name examples of how biology can help you understand environmental issues
It helps in DNA testing in medicine and forensics; transgenic (genetically modified) crops and bacteria
How is biotechnology used in processes of living things and helping in those processes
Safety of transgenic crops, spread of undesirable genes, decrease in biodiversity, ethical conversations
What are some questions raised about biotechnology
50; increased
In the past __ years, the knowledge of biology has (increased, decreased)
