scientists find the fossilized remains of a dinosaur in the bottom rock layers of a research site. they find the fossil of a mammal in the middle rock
layers. what can be concluded from this evidence?
a mammals lived on earth before dinosaurs
b dinosaurs lived on earth before mammals
c dinosaurs and mammals lived on earth at the same time
d mammals caused the extinction of the dinosaurs

Brainliest ! is slowing down a car an example of acceleration? explain. - explain correctly

Achange in which factor will affect the rate of reaction only when gases are involved? temperature pressure surface area concentration

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.