It's from the Hawaiian language and means the words "shiny, glassy surface, and smooth". The type of lava you want to know is Pahoehoe lava. Lava tubes are usually floored with it. 
Hope this helps! :-)
        
             
        
        
        
It was exposed to oxygen. This is called oxidation and it's a chemical reaction, meaning it can't be reversed. 
        
             
        
        
        
It too does Not require cellular energy. When molecules cannot move through a cell membrane passively, the Cell uses a process called_____________. This process uses_______________ found in the cells Membrane to pass particles and reach equilibrium.
        
             
        
        
        
 
1. Tropisms are directional movements or growth response of a plant to the stimulus. In nastic movements, the response of the plant is non-directional. An example of tropism is thigmotropism, which is a growth response to the touch stimulus.
2. Nyctinasty is the nastic movement of plant parts such as leaves and petals in response to darkness.
3. Thigmonasty is a form of nastic movement (of a plant or a fungus) as a response to touch or vibration.