Which of the following was most likely not present in creating the amino acids of early earths water of the past?

A. sulfur

B. nitrogen

C. hydrogen

or D. ammonia

What one does to collect a solvent from a solution by boiling

Describe how temperature and salinity affect the density of water.

What does it mean if a nation had a high dependency rate

If a spacecraft travels 3.6 AU per year, in how many years would it travel from Earth to Jupiter? A. 0.28 years B. 1.16 years C. 2.41 years D. 3.32 years

Describe how Russia's harsh winter has been both an obstacle and an advantage to the country.

5 3/8 + (6 3/4 - 4 1/8)

Which is accurate of the urban poor? A. They're often rural migrants with no title to housing or rights to established businesses. B. They live in apartment complexes. C. They have access to healthcare and obtain an education. D.

De ce sunt vulcanii activi in america?

How does still water affect glaciations?

What does lava become when it cools A. obsidian B. Basalt C. granite D. all lava could become either for of igneous rock