In a closed system, what is able to enter & leave?

All of the physical features of the earth except water make up the....

The living things on the planet make up the

Water that is evaporated or breathed out (transpired) by plants is called

The amount of the sun's energy that is reflected by the earth is called

Which is powered by geothermal energy?

Which is considered an acid?

About how much of the carbon released by burning fossil fuels is removed by ocean phytoplankton?

What rock is made from calcium carbonate, the major component of seashells?

According to the Conservation of Mass, the mass you start with in an experiment should be

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