Discuss these questions with your partner:

What do you observe about the Rocky Mountains and the Great Plains?
What do you think could have caused the rock formations in the Rocky Mountains and Great Plains to be so different yet have similar amounts of certain minerals?

Reaction rate depends on how many molecules are coming into contact with each other with enough energy to react. increasing the temperature of the reactants will increase -

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.