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.

Steps for weighing an object!

3rd graders will have a quiz on Wednesday, December 7 over the Steps for Weighing an Object. I have given them the option to take the test in a written format by sequencing the steps on paper just like the study guide I will send home OR they can put the balance together and weigh an item while describing the steps. They get to choose! Below, you will find the steps and /or you can watch a video to help you study! Good Luck!

P.S. I am using an old video so the dates on the video and at the end of the video are incorrect!  The test is Wednesday, December 7!

Step 1-Place the balance beam on the balance base.
Step 2-Set cups in the holes at the ends of the balance.
Step 3-Move the slider on the balance beam to zero the balance.
Step 4 Place the object to be wieighed in one cup.
Step 5-Place mass pieces in the other cup until the balance beam balances.
Step 6-Add up the total number of grams that the object weighs.
Step 7-Write the result on a student sheet or a piece of paper.
Step 8-Return the mass pieces to the container.