Which of the following is not true concerning the layers of the earth?
a.
the core is mostly composed of metals.
b.
the mantle has both solid and liquid regions.
c.
the layers of earth are uniform in thickness.
d.
the lithosphere includes both the crust and upper, solid mantle.

Use the drop-down menus to match each part of the scenario to the correct scientific practice. akira records the speed of a reaction without a catalyst and then with a catalyst. akira creates a reaction without a catalyst and repeats the reaction with a catalyst. akira turns in a written lab report to his science teacher. akira wonders, "will adding a catalyst speed up this chemical reaction? " akira writes in his notes that adding a catalyst sped up the chemical reaction because the catalyst lowers the activation energy needed to get the reaction started.