What is the amount of each element in a mixture or element that can be measured ​

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

The table presents the average day and night temperatures in five cities. it also reveals whether a city receives substantial rainfall (wet climate) or little rainfall (dry climate). which city’s rocks are likeliest to experience frost wedging, and why? a) city a because the consistently subzero temperature would prevent water from melting b) city b because it is a wet region and the temperature fluctuates around the freezing point c) city c because it receives plenty of rain fall and the weather is moderately cool d) city d because the hot and dry weather would cause rocks to absorb water