E-mail, texting, and social media have largely replaced

The distance between the sun and saturn is approximately six times the distance between the sun and which other planet?

In both Ecuador and Peru, what group speaks Quechua? A. wealthy mestizo farmers B. descendents of the Incas C. recent Asian immigrants D. people of European descent

Is this statement true or false? The Panama Canal project was one of the largest and most difficult engineering projects ever undertaken.

A substance has a half-life of 60,000 years and an initial mass of 1,000 grams. How many years will pass before only 250 grams of the substance's parent material is left? 30,000 90,000 120,000 240,000

Which of the following is a disadvantage of fossil fuels? Not easily available causes pollution when burned only available at certain times creates long lasting waste

What is the luminosity of a 2-solar-mass main-sequence star compared to the sun? 2 0.14 1.414 11.3?

To find the enthalpy of a reaction in the lab, you measured the of the reactants

Which of the following rocks is formed by cooling lava? A. obsidian B. limestone C. sandstone D. marble

What factor distinguishes a midlatitude desert (bwk) climate from a subtropical desert (bwh) climate?

Explain the difference between contour lines and relief and how they relate to elevation on a map.