Talk:Issue 2: The Effects of Gravity... at School/@comment-4411874-20120111033244

Science pop quiz! (Note: The questions are about sixth grade level, except the third one which is fourth grade level.)

1. What is the name of the radioactive potassium isotope, often found in bananas, that emits positrons? (The amount is so tiny that it can't harm us, for all of you that worry.)

2. Which element can destroy a star larger than our Sun in less than five seconds?

3. (this one is insanely easy) Which element was the second to be created in the universe?