### activity:

Experiment
* Most experiments involve studies in human learning, memory, and cognition.
* Some experiments do show that on days with a full moon there is more abnormal behavior
  - occur in life
* affect results.
* allow comparison.
* are an important part of the scientific method
  - central to the sciences
  - done by scientists
  - fundamental to the progress of science
  - hands-on activities involving positions and motions of the moon, planets, and stars
  - inquiries
  - located in laboratories
  - scientific research
  - ventures
* base on predictions
  - regional predictions
  - topics
* combine experiments.
* confirm importance
  - responses
* consist of trials.
* demonstrate causes
  - difficulty
  - effects
  - energy
  - homology
  - intensity
  - levels
  - microorganism causes
  - much difficulty
  - negative effects
  - occurrences
  - onsets
  - principles
  - productivity
  - sequence homology
* demonstrate strong effects
* encourage students.
* establish ideas
* examine components
  - impact
* focus on components
  - identities
* follow guidelines.
* give insight
  - similar results
* have aims
  - aspects
  - benefits
  - types
* help geologists
* illustrate impact
  - properties
  - roles
* improve productivity
  - situations
* include analyses
  - batteries
  - exclusion
  - neutron analyses
  - plants
* indicate benefits
  - functions
* introduce ideas.
* investigate ideas.
* involve analyses
  - assumptions
  - bacterium growth
  - human subjects
  - instruments
  - key steps
  - reductions
  - statistical assumptions
  - substances
* is the sole judge of scientific 'truth'
* lead to conclusions
  - improvement
  - investigations
* measure effects
* perform in different setting
* process of learning.
* produce evidence
  - same results
  - tentative evidence
* prove effects
  - theories
* provide development
  - direct evidence
  - hypotheses
  - information
  - measurements
  - proof
  - reflection
  - valuable information
* reflect differences.
* relate to energy
  - reaction
  - solar energy
* require adult supervision
  - assistance
  - considerable effort
  - creative problems
* require external fields
  - magnetic fields
  - interaction
  - observations
  - precise measurements
  - solve problems
* research project
* result in measurements.
* reveal actions
  - concentration
  - overlap phases
  - pressure
* serve purposes.
* show answers
  - conductivity
  - degrees
  - ecosystem stability
  - environments
  - enzyme reaction
  - extent
  - fluctuate environments
  - food sources
  - forces
  - genetic materials
  - habitat quality
  - inductions
  - management techniques
  - pathways
  - phenomena
  - presence
  - ranges
  - retention
  - salinity
  - simple techniques
* show that black bears can see color, unlike many mammals
  - electrons come out of atoms
  - light comes in discrete packets, called photons
  - microbes are involved in the mineralization of soft tissue
  - users
  - variation
  - vegetation responses
* solve mysteries.
* suggest ability
  - advantage
  - limit ability
* support conclusions
* take advantage.
* teach kids
* to evaluate quality
  - investigate effects
  - study effects
* use activities
  - approaches
  - beams
  - designs
  - devices
  - household products
  - patterns
  - scenarios
  - such materials
* yield positive results
+ Null hypothesis: Statistics
  * Every experiment has a null hypothesis.

### activity | experiment:

Animal experiment
* Many animal experiments utilize restraining devices, designed to prevent an animal from moving.
* can give dangerously misleading results that put human babies at risk.
* harm humans as well as animals.
* show results.

Control experiment
* are essential to a scientist's ability to make conclusions
* show variation.