Ques: By using multiple stages, empty fuel containers could drop away. This reduced the mass of the rocket so that it could fly higher. What happens when you make a rocket heavier goes higher or falls down?
Ans: falls down

Ques: The more dense the medium, the slower the light moves. John was looking at the lights passing through the object. He noticed that the less dense the medium, the light would move Faster or Slower?
Ans: Faster

Ques: Increasing the number of resistors in a series circuit increases the overall resistance of the circuit. If Jim adds more resistors to the circuit he is building for his school science project, what will happen to the overall resistance of the circuit it will increase or it will decrease?
Ans: it will increase

Ques: More recently, the death rate has fallen because of the availability of more food and medical advances. In ancient times, there was worse medicine. This means there was a lower or higher death rate?
Ans:
higher