LS Prac

Question 1

Constant variables

Answer 1

TEMPERATURE - external influence
PRESSURE - external influence
LIGHT - photosensitive experiment
TIME - consistent time intervals under the same conditions
CONCENTRATION - relationship between the outcomes of the experiment and concentration
VOLUME - accurate measurements
STIRRING - maintain uniform conditions
SAMPLE SIZE - quantity consistency

Question 2

Valid experiment

Answer 2

CONTROLLED EXPERIMENT - any observed effects can be attributed to the IV and not external factors
REPLICABILITY - can be conducted by other researchers through given methods
SAMPLE SIZE - the size must be large to detect meaningful effects
DATA RELIABILITY - proper instruments and measurements
PEER REVIEW

Question 3

Improving experiment

Answer 3

Sample size
Data collection
Repeat
Peer review
Ethical considerations