A researcher is testing the effect of sunlight on plant growth.  She takes 2 plants and places them in full sun, 2 are placed in a moderately sunny environment and 2 are placed in the dark.  Those placed in the dark are 

A. positive control
B. independent variable

C. dependent variable
D. negative control

A researcher hypothesizes that increased sunlight will cause increased plant growth.  She takes 2 plants and places them in full sun, 2 are placed in a moderately sunny environment and 2 are placed in the dark.  What is wrong with this experiment?  

A. There is no positive control

B. There are too many independent variables

C. There is not enough replication
D. The hypothesis is not testable

A researcher is interested in the effect of a new teaching technique.  He compares exam scores before and after using the technique and gives the students a survey to measure their attitude about the new technique.  The survey is:

A. a qualitative measure
B. a quantitative measure
C. not actual data that can be analyzed
D. a dependent variable
E. a qualitative measure and a dependent variable
F. a quantitative measure and an independent variable