"okay, that was good! now this time, don't close your eyes. keep your eye on the ball, so you know when to close your hand," mark says in the process of teaching his 5-year-old to play catch. in operant conditioning terms, mark is using to teach his daughter how to catch a ball.

Persuaded congress to adopt the missouri compromise in 1820. 1.) henry clay 2.) white southerners 3.) northerners 4.) thomas jefferson

Which of the following discoveries would be most likely to cause a scientific paradigm shift? a. the discovery of more rings around uranus b. the discovery of a new pathogenic virus transmitted by mosquitoes c. the discovery that a dormant volcano is showing signs of activity d. the discovery of a new species of salamander in the amazon rainforest e. the discovery that excess heat is radiating from the center of the earth and causing global climate change

What made it increasingly difficult for president roosevelt to stay neutral during world war ii?