Chapter 1 Vocab

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Science

A highly organized, step-by-step process,of trying to understand the world around us by using evidence obtained through observation and experimentation

Observation

Based on the use of our sense (See, taste, hear, smell and touch)

Data/Results

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

Hypothesis

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

Theory

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

Biology

The study of life

Cell

The smallest living part of an organism

Sexual Reproduction

New organism has 2 parents

Asexual Reproduction

New organism has 1 parent

Metabolism

The sum of all the chemichal reactions which an organism carries out for its life processes

Stimulus

Any change in the enviorment that causes a response

Response

The reaction of an organism to a stimulus

Homeostatis

Maintenance of an internal steady state, despite of what is happening in the enviorment

Evolution

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

Micorscope

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

Inference

A logical interpretation based on prior knowledge or experience

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