Biology Test Unit 1

definitions for bio test

Biosphere

all living things on earth

1st characteristic of life

Made up of one or more cells.
(Example: human (multicellular), amoeba (unicellular)

2nd characteristic of life

Display of organization (example: cellular organelles make up cells)

Definition: Organisms are highly organized and coordinated; they consist of one or more cells.  

3rd characteristic of life

grows and develops

Definition: organisms differentiate and change or increase in size

4th characteristic of life

reproduces

Definition: pass genes from one generation to the next

(example: homo spaiens)

5th characteristic of life

Responds to stimuli

Definition: reaction to something in environment

Example: plants can bend towards light

6th characteristic of life

Requires energy

Definition: take in food for energy or make own food like plants

Example: a plant needs water for energy

7th characteristic of life

Maintains homeostasis

Definition: keep all conditions stable

Example: Your body temperature

8th characteristic of life

Evolves over time

Definition: Adaptations – inherited characteristic that results from changes to a species over time.

what is science?

study of nature

what is scientific method?

a series of steps

what is the scientific theory?

an explanation made after repeated observations and experiments.  

what is science based on?

its based on facts

what is pseudoscience based on

its based on opinion

lists of steps for scientific method

• State the Problem/Question

• Research

• Hypothesis

• Procedure

• Observations

• Conclusion

constant

condition that does NOT change at all

control group

group used for comparison but given no factor

Experimental group/s

group/s exposed to the factor tested

Variable

something that changes

**Keep everything the same except 1 variable

independent variable

condition being tested or manipulated 

dependent variable

condition being measured