Modeling interconnected spheres
read the paragraph, and then complete the model fill in the blanks with the correct sphere names to model
fossil fuels are substances that can be burned to produce now sees are com
how spheres are connected when fossil fuels are
m emo
energy. the buming of fossil fuels releases certain gases dernie
into the air. these gases combine with other chemicals in
the air to form substances called acids. when trees on the
too of mountains are exposed to clouds that contain these
acids, the acids remove substances from the trees that
the trees fight against harmful insects