A lava lamp (or Astro lamp) is a decorative novelty item that contains blobs of coloured wax inside a glass vessel filled with clear liquid; the wax rises and falls as its density changes due to heating from an incandescent light bulb underneath the vessel. The appearance of the wax is suggestive of pāhoehoe lava, hence the name. The lamps are available in a variety of styles and colours of wax and liquid.

A classic lamp contains a standard incandescent bulb or halogen lamp which heats a tall (often tapered) glass bottle containing water and a transparent, translucent or opaque mix of mineral oil, paraffin wax and carbon tetrachloride. The water and/or mineral oil can be coloured with dyes. The density of common wax is much lower than that of water and would float on top under any temperature. However, the carbon tetrachloride is heavier than water (also nonflammable and miscible with wax), and is added to the wax to make its density at room temperature slightly higher than that of the water. When heated, the wax mixture becomes less dense than the water because wax expands more than water when both are heated. It also becomes fluid, and blobs of wax ascend to the top of the device where they cool (which increases their density relative to that of the water) and then descend. A metallic wire coil in the base of the bottle acts as a surface tension breaker to recombine the cooled blobs of wax after they descend.

Lava refers both to molten rock expelled by a volcano during an eruption and the resulting rock after solidification and cooling. This molten rock is formed in the interior of some planets, including Earth, and some of their satellites. When first erupted from a volcanic vent, lava is a liquid at temperatures from 700 to 1,200 °C (1,292 to 2,192 °F). Up to 100,000 times as viscous as water, lava can flow great distances before cooling and solidifying because of its thixotropic and shear thinning properties.

A lava flow is a moving outpouring of lava, which is created during a non-explosive effusive eruption. When it has stopped moving, lava solidifies to form igneous rock. The term lava flow is commonly shortened to lava. Explosive eruptions produce a mixture of volcanic ash and other fragments called tephra, rather than lava flows. The word "lava" comes from Italian, and is probably derived from the Latin word labes which means a fall or slide. The first use in connection with extruded magma (molten rock below the Earth's surface) was apparently in a short account written by Francesco Serao on the eruption of Vesuvius between May 14 and June 4, 1737. Serao described "a flow of fiery lava" as an analogy to the flow of water and mud down the flanks of the volcano following heavy rain.

Lamp or LAMP may refer to one of the following:

As an Acronym, LAMP may refer to:

Christina Victoria Grimmie (born March 12, 1994), known on YouTube as zeldaxlove64, is a pianist and singer/songwriter known for her covers of hit songs by artists such as Demi Lovato, Selena Gomez, Christina Aguilera, Miley Cyrus, Justin Bieber, Katy Perry and many more. In June 2011, she released her debut EP, Find Me.

Christina Grimmie is best known for her cover with fellow Youtuber, Sam Tsui, of Nelly's "Just a Dream" which has had about 60 million views between the two official versions of the video as of May 15, 2012. Her first video was "I Don't Wanna Be Torn", originally by Hannah Montana. She first reached YouTube stardom early on with her cover of Miley Cyrus's "Party in the U.S.A." on August 2009. Since, she's had over 289 million views and over 1.5 million subscribers on her channel as of May 15, 2012, which has made her the 4th most subscribed musician on YouTube. She also placed at number 2 at the top 5 of the MyYoutube competition, behind Selena Gomez, and in front of Rihanna, Nicki Minaj and Justin Bieber.