Which of the following substances is a mineral?
quartz
petroleum
pearl
granite
amber
quartz
You might also like to view...
In the fission reaction 235U + 1n ? 141Ba + 92Kr + neutrons, the number of neutrons produced is
A) 0. B) 4. C) 1. D) 3. E) 2.
What is the ecliptic plane?
A) the plane of Earth's orbit around the Sun B) the plane of Earth's equator C) the plane of the Sun's equator D) the plane of the Milky Way Galaxy
The current definition of the standard kilogram of mass is based on
A) the mass of the earth. B) the mass of the sun. C) the mass a particular object kept in France. D) the mass of a cesium-133 atom.
If you stand in front of a double-concave mirror, exactly at its center of curvature, your image will appear where you are, but
A) larger and upside down. B) the same size and upside down. C) larger and upright. D) the same size and upright.