Gravity
5th Grade Science · 7 lessons
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Lessons
- 1ElectromagnetsElectromagnets are temporary magnets created by running electricity through a coiled wire. They can be turned on and off and are used in motors, speakers, and MRI machines.Experiment
- 2Magnetic Poles and FieldsMagnets have north and south poles. Opposite poles attract and like poles repel. The magnetic field is strongest at the poles and gets weaker with distance.Experiment
- 3Static Electricity and ElectronsStatic electricity builds up when objects gain or lose electrons through rubbing. Rubbing a balloon on your hair transfers electrons, making the balloon stick to a wall.Experiment
- 4Weight Is a Force, Mass Is NotMass is the amount of matter and is measured in kilograms. Weight is the pull of gravity on that mass and is measured in newtons. On Earth every kilogram weighs about 10 N; on the Moon it weighs less than 2 N.Experiment
- 5Gravity Reaches Across SpaceGravity does not stop at the ground. It reaches out from Earth far enough to hold the Moon in orbit, and out from the Sun far enough to hold every planet. The further away you go, the weaker it gets.Experiment
- 6Why Astronauts FloatAstronauts on the space station are not beyond gravity — it is still about nine tenths as strong there as at the surface. They float because they and their spacecraft are falling around the Earth together, and everything falls at the same rate.Experiment
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