Unit 1 TEST vocabulary Flashcards
Observation
Description of something you see, smell, touch, taste, and hear, your 5 senses
Inference
A guess about an object or outcome based on your observations
Qualitative
Descriptive words/adjectives
Quantitative
Using numbers to measure something
Precision
“Are the measurements close together?”
- Think: Is the data consistent?
Accuracy
“Are measurements close to a set/accepted value?”
- Think: Is the data correct?
Hypothesis
A testable prediction based on observations that describes a cause and effect relationship between variables
- An if then statement
Independent variable
What the experimenter will deliberately change or manipulate in the investigation
- “What am I as the experimenter changing?”
Dependent variable
what changes in response to the independent variable
- “What DATA am I collecting”
Constants
Aspects on an experiment that are held consistent (ensures ALL aspects of trials are identical, EXCEPT for the IV)
Experimental group
every other group that’s being tested/studied
Control group
the group used as a basis for comparison (the “normal” group - group that does not have a IV)
Atom
The smallest unit of an element
- atoms make up matter
Matter
anything that has mass and takes up space
An electron has a ____ charge and is found ____ the nucleus
Negative, outside
A proton has a ____ charge and is found ____ the nucleus
Positive, inside
A neutron has a ____ charge and is found ____ the nucleus
Neutral, inside
Cell
basic structural and functional unit of all forms of life
Cohesion
attraction between two SAME molecules
Adhesion
attraction between two DIFFERENT molecules
Polar
UNequal sharing of electrons
Nonpolar
equal sharing of electrons
Solute
what gets dissolved
Solution
Mixture of two substances
