Can someone help with this cross puzzle thanks !

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?

When rutherford performed his metal foil experiment, he was surprised that most of the alpha particles

Which of the following must be true for a fossil organism to be useful as an index fossil? a. the fossil organism must be widespread geographically. b. the fossil organism must be abundant. c. the fossil organism must be limited to a short span of geologic time. d. all of the above.