My Account  |  0 item(s)    View Cart

Blog/Coupon

Lighthouse Educational Coupons and Offers:

 Zero Interest for 6 months on orders over $99.
 Choose Paypal Credit at checkout!
 No expiration
----------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------------------------------

Classroom Science Supplies Box to accompany Classical Conversations Foundations Science

Posted by Teresa Wirtz on 1/31/2019 to News
Classroom Science Supplies Box to accompany Classical Conversations Foundations Science
Lighthouse Educational Products offers Classroom Science Supply Boxes  to accompany Classical Conversations Foundations Science.

We also offer Tutor Packs, Weekly Packs, Components and Supplies, Family Boxes, and so much more. 

The Tutor Training Packs are packaged for quarterly tutor planning meetings.  The packs contain one of each experiment to be completed during training. 
These are the same supplies included in the Classroom boxes, so the tutors have hands on experience.

---------------------------------------------------------------------------------------------------------------

How to complete a Mineral Streak Test

How to complete a Mineral Streak Test

How is the streak test performed?

See a DEMONSTRATION VIDEO here.

Aside from the mineral to be tested, the only necessary tool is a streak plate, which usually consists of an unglazed piece of white or black porcelain.

To conduct the test, simply drag the mineral across the porcelain plate, exerting enough force to leave a powdered line on the plate. In principle, this is analogous to a graphite pencil leaving its mark on a piece of paper.

As you can see, the streak test is an easy one to conduct, but there are a few additional details to remember.

1. Never use a weathered part of a mineral when conducting the test. 

2. Remember that minerals with a MOHS hardness of 7 or more can’t be streak tested because they are harder than the plate, and will not leave a streak.