An igneous rock that contains mostly plagioclase feldspar and about 30 percent dark silicate minerals has a composition that is

How do plants obtain nitrogen? They remove it from the air. They absorb it through their roots. They fix it in their leaves. They produce it in their stems.

In the ground state, which noble gas has atom with the same electrons configuration as a magnesium ion

What is described in the following equation? 2H2 (g) + O2 (g) → 2H2O (l) A. hydrogen gas combining with oxygen gas to form water B. hydrogen gas combining with water gas to form hydroxide C. water decomposing to oxygen gas and hydrogen gas D.

In the 1830s, President Andrew Jackson supported the Indian removal policy because (1) white settlers desired the land on which Native American Indians lived (2) Native American Indians were attacking southern cities (3) he wanted to punish Native

Specific Heat of Water = 4.186 J/g°C Specific Heat of Ice = 2.00 J/g°C Molar Heat of Fusion = 6030 J/mol Molar Heat of Vaporization = 40790 J/mol You take an ice cube (mass = 18g) from the freezer (T = - 10ºC) and place it on the table.

After swallowing, how does food go to the stomach through the esophagus? A. solely by gravity B. pushing at the tongue C. air pressure D. squeezing of esophagus

Which molecule has a trigonal planar shape? carbon monoxide boron trichloride silicon tetraiodide carbon tetrafluoride

The energy required to raise the temperature of one gram of a substance by one C

How has scientists' understanding of the atoms changed over time?

What is the secret word?