This unit discusses in detail the role of catalysts to lower the activation energy of reactions. the term catalyst appears in nonscientific discussions to refer to something that provokes or speeds significant change or action. consider this example from the 2006 associated press article "chernobyl cover-up a catalyst for glasnost": "for the soviet union, chernobyl was a catalyst that forced the government into an unprecedented show of openness that paved the way for reforms leading to the soviet collapse." discuss how this scientific term has made its way into common usage. does the term carry the same meaning in regular usage? how is it used differently in a scientific context compared to a nonscientific context?

Gymnast always perform on padded mats. how does the mats protect the gymnast

1. an experiment in your science class lists the materials needed for the lab. it is your job, as a lab partner, to measure out 25 ml of distilled water and 2.5 grams of magnesium. what lab measuring tools would you choose to measure each substance and how would you use each tool to get the correct amounts? be sure to describe the process you would follow step-by-step. (5 points) 2.which of the following is an si base unit for measuring mass? (2 points) ampere gram meter pound 3.which of the following is an si base unit for time? (2 points) decades hours minutes seconds 4.which of the following tools should a scientist use to measure an object in milligrams? (2 points) graduated cylinder pan balance tape measure thermometer 4.which of the following tools should a scientist use to measure an object in milligrams? (2 points) graduated cylinder pan balance tape measure thermometer. 5.a pencil beside a metric ruler. the ruler is scaled from 1 centimeter to 10 centimeters, with markings for millimeters between each number. one end of the pencil is beside the 0 on the ruler, and the pencil point is beside the 5. which of the following measurements is accurate but not precise? (2 points) 5 mm 5 cm 50 mm 50 cm 6. which of the following prefixes represents the largest value? (2 points) giga hector kilo milli 7. which of the following types of graphs is best for plotting the percentages of a whole value in a data set? (2 points) bar graph circle graph histogram line graph

An unknown insoluble substance displaced the water shown. it's mass is indicated on the triple beam balance. mass = a. 694 b. 693.5 c. 693.0 d.693.8