Checkpoint Science Past Papers 2010 Mark Scheme Guide

She was grading a mock test from her best student, a quiet boy named Eli. He had a gift for seeing connections where others saw chaos. For question 9(c)—the one about why a metal spoon gets hot in soup—Eli had written:

But the real test came at question 15—the one about the girl pushing a box across a carpet. The mark scheme wanted: "Friction opposes motion. Energy is transferred to heat and sound." Checkpoint Science Past Papers 2010 Mark Scheme

Then she closed the mark scheme.