Homework in fourth grade will require 30-40 minutes per night. The English-Language Arts curriculum is literature based. It emphasizes the integration of reading, writing, spelling, listening, and speaking. A magnetic field can produce an electric current, and an electric current causes a magnetic field. Objects become electrically charged by gaining or losing electrons.
Magnets produce a field that exerts a force on other magnets.
Electric currents and conductors have many uses. A circuit is a pathway for electric current to follow. Plants and Animals Living things have certain characteristics that distinguish them from non-living things. Complex living things undergo certain processes that enable them to survive and reproduce. Earth's Oceans Ocean water has definite physical and chemical properties.