Jonah decided to cook dinner for his wife, Carol, even though he never cooks. He didn't use a recipe and on instinct combined ingredients, including milk that he didn't notice was spoiled. When Carol got home, he gave her a bowl of his creation. As she smelled it, Jonah noticed that, only for a second, her upper lip raised and her nose wrinkled. Carol displayed a(n) ________.

A researcher has conducted an experiment in which she

assigned all of her students four hours of homework the night before a test, in order to see what effect the extra stress has on test performance. The study is flawed because the researcher did not include a(n) _____ a) control group. b) experimental group. c) independent variable. d) random sample.

__________ is becoming more socially acceptable in Western Europe and North America,

which may account for higher rates of sexual activity among teens. Fill in the blanks with correct word