22 terms

Chapter 1 Vocab

A highly organized, step-by-step process,of trying to understand the world around us by using evidence obtained through observation and experimentation
Based on the use of our sense (See, taste, hear, smell and touch)
Information that can be taken away from or collected during an experiment
Should confirm or deny your hypothesis
Needs to be organized in graphs or tables to show the relationship
An educated guess as to why the observation occurred
Stated in an "if...then..." statement
Tries to make a connection between two different ideas or facts
Applies to a well-tested explanation that unifies a broad range of observations
Controlled Experiment
All variables are kept the same except the one being tested
Independent Variable
Variable being tested or changed
Dependent Variable
Any variable that is altered as a result of the change of the independent variable
The study of life
The smallest living part of an organism
Sexual Reproduction
New organism has 2 parents
Asexual Reproduction
New organism has 1 parent
The sum of all the chemichal reactions which an organism carries out for its life processes
Any change in the enviorment that causes a response
The reaction of an organism to a stimulus
Maintenance of an internal steady state, despite of what is happening in the enviorment
Change over time
Individual organisms cannot evolve, but groups of organisms can
Metric System
The decimal system based on certain standards and scaled on multiples of 10
Any device that produces magnified images of structures that are too small to see with the unaided eye
Compound Light Microscope
Produces imagees by focusing light rays
Light passes through specimen
Can observe living or dead things
Electron Microscope
Produces images by focusing beams of electrons
1000x more powerful than a light microscope
Cannot study living things-must me placed in a vaccum and dried out
A logical interpretation based on prior knowledge or experience