Determine which type of property each statement describes by typing “physical” or “chemical” in the blank. hydrogen is a colorless, tasteless, and odorless gas. hydrogen is very combustible in the presence of oxygen. hydrogen is very reactive with most elements. hydrogen is the least dense of all elements.

If gases like carbon dioxide and methane make up less than 1% of the total atmosphere, why is it important for scientists to monitor changes in percentages of these gases?

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents

What is the name for the remnant of an asymptotic giant that has lost its shells? black dwarf white dwarf yellow giant black hole