*Question*
Answer the following question given this paragraph: Galileo's Experiment Galileo is said to have dropped two objects of different masses from the Tower of Pisa. He measured how long it took each to reach the ground. Since stopwatches weren't readily available, how do you think he measured their fall time? If the objects were the same size, but with different masses, what do you think he should have observed? Would this result be different if done on the Moon? PhET Explorations: Masses & Springs A realistic mass and spring laboratory. Hang masses from springs and adjust the spring stiffness and damping. You can even slow time. Transport the lab to different planets. A chart shows the kinetic, potential, and thermal energy for each spring. Q: Who is said to have dropped two objects of different masses from the tower of pisa? Choices: - darwin - copernicus - newton - galileo A:
**Answer**
galileo

*Question*
Answer the following question given this paragraph: Native elements contain only atoms of one type of element. They are not combined with other elements. There are very few examples of these types of minerals. Some native elements are rare and valuable. Gold, silver, sulfur, and diamond are examples. Q: What do you call elements that contain only atoms of one type of element? Choices: - typical elements - noble gases - reactive elements - native elements A:
**Answer**
native elements

*Question*
Answer the following question given this paragraph: Fingernails and toenails consist of specialized epidermal cells that are filled with keratin. The keratin makes them tough and hard, which is important for the functions they serve. Fingernails prevent injury by forming protective plates over the ends of the fingers. They also enhance sensation by acting as a counterforce to the sensitive fingertips when objects are handled. Q: What makes toenails and fingernails hard? Choices: - guanine - cellulose - taurine - keratin A:
**Answer**
keratin

*Question*
Answer the following question given this paragraph: Temperature is the quantity measured by a thermometer. Temperature is related to the average kinetic energy of atoms and molecules in a system. Absolute zero is the temperature at which there is no molecular motion. There are three main temperature scales: Celsius, Fahrenheit, and Kelvin. Temperatures on one scale can be converted to temperatures on another scale using the following equations:. Q: What does a thermometer measure? Choices: - oxygen - precipitation - size - temperature A:
**Answer**
temperature