question: Write a question you would see in a school textbook. OPTIONS:
- liquid forming valleys on Mars
- hundreds of active volcanoes on Io
- rock and ice forming the core of Neptune
- ice covering the entire surface of Europa
answer: Scientists study the current conditions of many solar system objects to gain insight into conditions early in the history of Earth. Which phenomenon most closely models current theories of early Earth?

question: Write a question you would see in a school textbook. OPTIONS:
- chemical
- mechanical
- potential
- kinetic
answer: Temperature is the measurement of which type of energy?

question: Write a question you would see in a school textbook. OPTIONS:
- invent the microscope.
- read through his journals.
- duplicate the results of his experiments.
- invest money in his scientific investigations.
answer:
Gregor Mendel was the first to show that organisms had traits that are passed on from parents to the next generation. In order for the scientific community to accept Mendel's discovery, others had to