Does an invisible underwater crater prove an asteroid killed the dinosaurs? Explain, using evidence from the article. Article: How does an invisible underwater crater prove an asteroid killed the dinosaurs.

yes any invisble under water bla bla bla

Explanation:

i cant find texst sorry but the answer is yes but the explanation or example in the test is probly in the begging of the story or at the end of in hope this helps

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

c it has to be i googled it