In Grade 3, students build on their initial awareness of forces as pushes or pulls (see Grade 2, Cluster 3: Position and Motion). In this cluster, the focus is on forces that act without direct contact: gravity, magnetism, and static electricity. Students describe evidence that shows that objects and living things on or near Earth are affected by a force called gravity, enhancing their understanding of the nature of science. Through their investigations, they determine that magnets have two poles and are surrounded by a magnetic field. They describe interactions of like and unlike poles, and compare Earth to a giant magnet. In addition, they identify ways of producing electrostatic charges using everyday materials. Students show how the strength of magnetic and electrostatic forces varies under different conditions. New understandings of gravity, magnetism, and static electricity are further refined as students identify and construct devices that use these forces.
Students explore three invisible forces that attract and repel:
1. Magnetism
2. Gravity
3. Static Electricity
Important vocabulary:
force
attract
repel
magnets
magnetic
magnetism
north pole
south pole
gravity
static electricity
Magnetism Links:
1. Bill Nye "Magnitism" - https://www.youtube.com/watch?v=079ROtsEf2k&list=PL7guVzvUBGUsKx0pMEh1etbcC7AUyS2cJ 2. Magnetic Field - https://www.youtube.com/watch?v=vgWiBYuPpjw
3. "Magnetism" 1 - https://www.youtube.com/watch?v=DR9w4koW2EA&list=PL7guVzvUBGUsKx0pMEh1etbcC7AUyS2cJ&index=3 4. "Magnetism" 2 - https://www.youtube.com/watch?v=yXCeuSiTOug&list=PL7guVzvUBGUsKx0pMEh1etbcC7AUyS2cJ&index=4
5. "Magnets Attract and Repel" -https://www.youtube.com/watchv=oHMSgKKi3jc&list=PL7guVzvUBGUsKx0pMEh1etbcC7AUyS2cJ&index=5
Gravity Links:
1. "What is Gravity" -
https://www.youtube.com/watch?v=N3OMgf2EByI&list=PL7guVzvUBGUsKx0pMEh1etbcC7AUyS2cJ&index=25
2. Bill Nye "Gravity" - https://www.youtube.com/watch?v=0Rd1HWtF9PE
Static Electricity Links:
1. Bill Nye "Static Electricity" -
https://www.youtube.com/watch?v=Z-77IzaXGcg&list=PL7guVzvUBGUsKx0pMEh1etbcC7AUyS2cJ&index=19
2. "How Static Electricity Works" -
https://www.youtube.com/watch?v=fT_LmwnmVNM&list=PL7guVzvUBGUsKx0pMEh1etbcC7AUyS2cJ&index=20