
How much are US presidents paid? Step graph. Fair?
Mardi Gras, meaning, parades, beads, value, cost, reuse, environment.
On February 6th, Turkey and Syria were hit with a powerful 7.8 magnitude earthquake. What does a 7.8 magnitude earthquake imply? What’s a seismometer? What is the amplitude of a seismograph and what does it mean? Use our Richter scale activity to introduce your students to logarithmic Richter magnitudes.