1. Indicar cuáles de las proposiciones son verdaderas : I. El Cloro (Z = 17) esta en el tercer período II. El Litio (Z = 3) esta en el grupo I A III. El Neón (Z = 10) esta en el grupo II A a) I y II b) I y III c)Sólo III d) II y III e) Sólo II

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

An alcohol thermometer makes use of alcohol's changing in order to measure temperature. as the temperature goes up, the alcohol contained in the thermometer increases in volume, filling more of the thermometer's tube.

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line