Sam did an experiment with ball bearings in a bottle to show the movement of particles in solids, liquids, and gases. the experimental set-up is shown below: *pic* what should sam do to represent the movement of particles in liquids? leave all ball bearings in the bottle, and then shake the bottle slowly while the ball bearings remain in their spot. leave a few ball bearings in the bottle, and then shake the bottle vigorously so that the ball bearings hit one another and the sides of the bottle. remove half of the ball bearings, and then shake the bottle vigorously so the ones at the top hit one another. remove half of the ball bearings, and swirl the bottle so that the ball bearings remain in contact but can move around.

This one’s a little tricky. I think your 2 best options are B and D

Not sure if you want to represent the particles moving but not making contact, which would be B or the particles moving and keeping contact which would be D.

Hope this helps a little

-AaronWiseIsBae (aka Lexi)

The best option is D.

Since Sam wants to represent the movement of particles in liquids, he should remove half of the ball bearings and swirl the bottle so that the ball bearings remain in contact but are able to move around. If all the bearings are bottled up fully, the movement of the particles in liquids wont be quite clear.

a fossil fuel is a fuel formed by natural processes, such as anaerobic decomposition of buried dead organisms, containing energy originating in ancient photosynthesis.[1] the age of the organisms and their resulting fossil fuels is typically millions of years, and sometimes exceeds 650 million years.[2] fossil fuels contain high percentages of carbon and include petroleum, coal, and natural gas.[3] other commonly used derivatives include kerosene and propane. fossil fuels range from volatile materials with low carbon to hydrogen ratios like methane, to liquids like petroleum, to nonvolatile materials composed of almost pure carbon, like anthracite coal. methane can be found in hydrocarbon fields either alone, associated with oil, or in the form of methane clathrates.

the theory that fossil fuels formed from the fossilized remains of dead plants by exposure to heat and pressure in the earth's crust over millions of years was first introduced by andreas libavius "in his 1597 alchemia [alchymia]" and later by mikhail lomonosov "as early as 1757 and certainly by 1763".[4] the first use of the term "fossil fuel" was by the german chemist caspar neumann, in english translation in 1759.[5]

in 2017 the world's primary energy sources consisted of petroleum (34%), coal (28%), natural gas (23%), amounting to an 85% share for fossil fuels in primary energy consumption in the world.[6] non-fossil sources in 2006 included nuclear (8.5%), hydroelectric (6.3%), and others (geothermal, solar, tidal, wind, wood, waste) amounting to 0.9%.[7] world energy consumption was growing at about 2.3% per year. in 2015 about 18% of worldwide consumption was from renewable sources.[8]