3.2.5.F: Support an argument that the gravitational force exerted by Earth on…

Forces at Work: Gravity, Resistance, Levers and Pulleys Grades 4–5

Do heavy things really fall faster? Why are fast swimmers shaped like torpedoes? How can a small push lift a big load? Three hands-on lessons on gravity, air and water resistance, friction, levers and pulleys, measured in newtons with homemade and simple tools.

• Do heavy things really fall faster? 60–70 min

  Teams drop a light and a heavy container side by side and find that they land together, then add parachutes of three sizes and time the fall. They calibrate a rubber-band force meter in newtons and explain what gravity and air each do.

Printable practice for 3.2.5.F

• Forces at Work: Gravity, Resistance, Levers and Pulleys workbook included with the unit

  1 word wall, 1 English-support page, 1 practice page, 1 reading, 1 unit review, 1 unit test, with answer keys.

• The Solar System: Gravity, Orbits and Scale workbook included with the unit

  1 word wall, 1 English-support page, 1 practice page, 1 reading, 1 unit review, 1 unit test, with answer keys.

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