A star is born whenever a nebula expands ... True Or False?

Small rocks weather more quickly than large rocks because, compared to their volume, the surface area of small rocks is

What happens to a cell in a isotonic solution?

What mineral is not scratched by a fingernail, but is scratched by a copper penny?

What is the approximate bond angle in SF2? A. 90° B. 109.5° C. 120° D. 180°

A soccer player twists her ankle on the field. The atheltic trainer applies an ice bag with 260 g of ice inside. How much heat, in joules, wil be absorbed, to melt all the ice to 0°C?

In an experiment, having too many variables A might solve the problem faster B could solve more than one problem C will cause too many problems D will not matter

The activation energy decreases with increase in temperature. why?

What are the characteristics of Archaebacteria? A. they are single cells that have a nucleus and tend to live in extreme conditions. B. they are single cells that lack a nucleus and tend to live in extreme conditions. C.

Avogadro's number was calculated by determining the number of atoms in

A certain shade of blue has a frequency of 7.26 * 1014 Hz. What is the energy of exactly one photon of this light?