What do scientists use to divide the geologic time scale?

Major divisions in the fossil records

Major divisions in the sedimentary rock layers

Evidence for catastrophic events in Earth's history

Major changes in mineral deposits in the rock layers

Which interactions can contribute to the intrinsic binding energy during enzymatic catalysis?

The driver of a car going 90km/h suddenly sees the lights of a barrier 40.0m ahead. The driver hits the brakes and begins slowing down with an acceleration of - 10m/s^2. Does the car hit the barrier, or does it manage to stop before impact?

You mix two clear solutions, instantly your see a bright yellow precipitate form. What type of reaction did your just observe

Gamma rays have more energy than X-rays. What else is true about gamma rays? A. They have a longer wavelength than X-rays B. They have a higher speed than X-rays. D. They have a higher frequency than X-rays. C.

The force of attraction exerted by non moving static charges in each other A) electrostatic force B) gravitational force C) electromagnetic force D) attractive force

5. What is the percent composition of sulfur in H2SO4? A. 32.7% B. 65.2% C. 98.1% D. 2.1%

A 0.8kg object accelerate at a rate of4 m/s2. What is the net force acting on a object

Which of the following is the best definition of an isotope? A. elements of the same kind with different numbers of neutrons B. elements of the same kind that have lost electrons C. elements of the same kind that have different electrical charges

Two cars approach each other; both cars are moving westward, one at 85 km/h, the other at 54 km/h. what is the magnitude of the velocity of the first car relative to (in the frame of reference of) the second car? answer in units of km/h.

What usually causes high concentration of minerals to form