4th grade quiz-Friday, December 9

Magnetism & Electricity   Investigation 1:  The Force

Study Guide for Quiz-Friday, December 9, 2016

*If a magnet sticks to an object, that object is iron or steel.

*A rock that contains iron is a mineral called magnetite.  It is very rich in iron.

*A force is a push or pull.

*When magnets pull together, we say they attract.

*When magnets push apart, we say they repel.

*A piece of iron that behaves like a magnet when it is touching a permanent magnet is a temporary magnet.

*Induced magnetism is the influence of a permanent magnet’s magnetic field on a piece of iron, which makes the iron act like a magnet.

*A graph organizes data visually to show a relationship between two things.

*A prediction is an educated guess based on data or previous experience.

*The intersection of two lines is the point at which they cross.

*The magnetic force acts through space and most materials.

*The greater the distance between two magnets the weaker the force of attraction.

*A detector is something you use to gather evidence about something you can’t see.