How does the environment play an important role in creating petrified fossils? Cold environment prevents fossils from being created.
The right conditions need to be present in order for fossilization to occur.
All fossils are created in the same type of environment.
Hot environment prevents fossils from being created.

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.

Which are forms of frozen water? check all that apply. dew frost hail rain sleet

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.