What does 'to chock a table' mean?

These sections called .. are composed of the crust and a part of the upper mantle? What is saturation effect? Is it true that a physical change and a chemical are exactly alike? How do you find an underground leak in a 1000 foot underground PVC pipe? What are ammonites? What is soap chemically? What is the name of the model of the solar system that shows that the sun moon and planted revolve around earth? What part of the eye is made of tough tissue? What was ernest Rutherford father name? How long does it take to build a tidal power station? What is olivine syenite? How are euglena like all other cells? What color does the clear alcohol become once the leaf is boiled in it? What planet experiences large dust storms.? Why did other geologists reject Wegener's idea? Does global warming ends up the world in 2012? What are two depositional shoreline features that are created when longshore currents deposit sand? How many atoms does rna have? The chemical formula for active dry yeast? Give an example of a monoprotic acid?

What does 'to chock a table' mean?