Check How does the atmosphere protect life on Earth? Check all that apply.
It provides oxygen for living things.
It prevents Earth from being hit by meteoroids.
It allows water to exist as a liquid.
O O O
It purifies water that falls as snow and rain.
It blocks the Sun's harmful rays.

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of tthe table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 9 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

What is the volume of 2.5 moles of nitrogen gas (n2)at standard temperature and pressure (stp)?

Which activity describes an application of topographic maps? check all that apply. recreation, such as camping and hiking engineering, such as the construction of roads and buildings science, such as mapping stars in the sky business, such as analyzing population centers science, such as analyzing surface features