Answer:
A. A scientist investigates a mouse's growth in nature by watching the animal.
A field study is a raw collection of data, typically in the natural habit of the organism; hence why an experiment taken in a lab isn't a field study.
Petrified fossils, they are made of wood that becomes petrified from pressure and lack of oxygen.
Answer:
i think C the higher the frequency the lower the energy of light.
Answer:
1 cal = 0.004187 kJ
1,500,000 cal = 6280.5 kJ
