1. Who came up with a periodic table that included all of the known elements?
a. Dmitri Mendeleev
c. Stephen Hawking
b. Albert Einstein
d. Marie Curie
2. What do you call the series of steps designed to help you solve problems and
answer questions?
c. Observation
c. Hypothesis
d. Scientific Method
d. Experiment
Answers & Comments
Answer: 1. a Dmitri Mendeleev
2.d Scientific Method