8 T H GRADE SCIENCE REPORT PROBLEMS

Physical Science

Construct a boat that can float and carry cargo.

Must be made only of metal, fit in 15 square centimeters, have no sharp edges, and weigh less than 10 pennies

Support a cargo equal to the weight of 50 pennies without taking on any water for a minimum of 10 seconds

Travel 1.5 metersMust communicate the scientific principles

used in your boats design

Design, build, and test a complex machine that can lift a 600-gram soup can 5 centimeters

Must be made of materials approved by the teacher

Consist of at least 2 simple machines working in combination

Lift a soup can a minimum of 5 centimetersMust use in input force of less than 600

gramsMust have calculated the ideal and actual

mechanical advantage

Design and build a roller coaster that uses kinetic and potential energy to move

Must be no wider than 2 meters and be easily assembled and disassembled

Must have a first hill with a height of 1 meter and have at least 2 additional hills

Must have an object that moves along the entire track without stopping

Must describe their model in terms of kinetic energy, potential energy, and the law of conservation of energy

Must describe how their model illustrates energy transformations