Answer:
The following are some of the differences between industrial cities and pre industrial cities.
Explanation:
- In industrial cities, each phase of production is carried out by specialists while in pre-industrial cities each phase is carried out by craftsmen
- Pre-industrial cities are congested while industrial cities are not.
- Industrial cities embrace modern transportation facilities while pre-industrial cities use primitive transportation technology.
- Pre-industrial cities use primitive sources of energy while industrial cities embrace modern energy sources.
Answer: a. testing effect
Explanation:
Testing effect is a type of threat to internal validity of an experiment. Internal validity is assessing whether a factor makes a difference in an experiment or not and if it does, whether there is adequate evidence to support this correlation.
Testing as a threat to internal validity is when a second test is taken on the outcome of a first test. Other internal validity threats are history, maturation, instrument modifications.
Answer:
I Don't your understand language.
Andrew Johnson was the president who signed the treaty to purchase Alaska from Russia on March 30, 1867.
