The texture of obsidian is best described as glassy. Why does obsidian contain few or no mineral grains? by the way I put it under physics because that's what it's labeled as on my side.

One nucleus contains 31 protons and 40 neutrons another nucleus contains 31 protons and 41 neutrons what can you conclude about the identity of this neclei

Which explains how winds cause surface currents? A. Winds cool the surface water. As the water sinks, it creates surface currents. B. Friction between the blowing air and the water drags the water along and creates surface currents. C.

A man rides in an elevator while standing on a bathroom scale calibrated to read force in Newtons. As the elevator starts to move upwards it speeds up with an acceleration of magnitude 2.1 m/s2. The scale displays a force of 844.9 N.

The greenhouse effect plays a major role in the climate of a planet. Visit the Greenhouse Effect AstroTour (Links to an external site.), and use what you learn there to choose all the statements below that are correct. Note that 273 K = 0°C = 32°F.

How does wind affect precipitation

Which would react chemically by forming an ionic bond? A. 2 chlorine atoms with 7 valence electrons each B. 1 neon atom with 8 valence electrons and 1 lithium atom with 1 valence electron C.

Which of these are considered an oxidizing mutagenic agent? x-rays benzopyrene gamma rays

5. A B note has a frequency of 493.88 Hz. Calculate its wavelength in meters.

When one of the electrons of a particular atom undergoes a transition to a quantum state of lower energy, it a) collides with another of its electrons b) exchanges quantum states with another of its electrons c) undergoes a transition to a quantum

What's the symbol for an ionized bromine atom?