Q: David was studying for his chemistry exam. To understand the elements of the periodic table better he categorized them into three groups, cat A, cat B, and cat C. In cat A he placed all the elements with atomic numbers lower than 83. In cat B he put the elements with atomic numbers from 83 to 94. Finally, in cat C he placed the elements with atomic numbers over 94. He found it easier to see their differences after he categorized them. Would cat B have longer or shorter half-lives than cat C?
A: longer

Q: Johnny is playing with a toy train set his parents bought him. The controls for this train set allow him to make it go faster or slower and it even has a rail switch to make it travel on different tracks branching off to the left or right. Given Johnny decides to slow the train down, will this be an example of acceleration or deceleration?
A: deceleration

Q: John and Mary were studying insects. John liked to study insects that never eat, while Mary decided to study insects that are very healthy eaters. Which person studied less about locusts?
A: John

Q: Two teams of researches studied Antarctica's climate. The team studied two different regions. The US team studied East Antarctica, while the Swiss team studied West Antarctica. Which team didn't learn about a region that shows stronger warming in spring?
A:
US