Which set of elements has the MOST similar physical and chemical properties? A. K, Ca, Sr
B. K, Cs, Fr
C. K, Ca, Rb
D. K, Sr, Li

Which of the following is a testable hypothesis? a. if i brush my teeth, i will get fewer cavities than if i don't brush my teeth. b. green toothpaste tastes better than blue toothpaste or red toothpaste. c. smart, careful, healthy people always brush their teeth. d. it's wrong to not brush your teeth before you have an important conversation with someone.

Which type of stress results when two plates push against one another? a. compression b. tension c. force d. shear

Geothermal energy for industrial use is available almost anywhere. a.true b.false