Match each feature on Earth with the correct plate boundary. You know that Earth's crust is divided into tectonic plates that moves via convection cells within the mantle. As these plates move, three kinds of plate boundaries are formed: divergent, convergent, and transform plate boundaries. Not only do these boundaries form, specific events occur at these boundaries.

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Himalayan Mountains

Mid-Ocean Ridge San Andreas Fault

The largest known group of volcanoes on Earth is found underwater along the portion of the East Pacific Rise.

This boundary is the site of recurring earthquake activity and faulting

Two continental plates meet and formed folded mountains.

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Convergent boundary, Divergent boundary, Transform boundary

good thing- during decomposition the organic molecules in organic matter are broken down into simpler organic molecules that require further decomposition or into mineralised nutrients

bad thing- it can be harmful in crop productivity

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.