by STAO ADMIN | Nov 12, 2019
The sky has been mystifying civilizations for thousands of years. Many civilizations have performed religious ceremonies and timed agricultural activities based on celestial events such as eclipses and full moons. Arguably the most important benefit of making...
by STAO ADMIN | Nov 12, 2019
We are most accustomed to making observations directly with our eyes. Students therefore often find it conceptually challenging to comprehend the reasoning and logic used by scientists studying atoms that they cannot directly see. This activity allows the students to...
by STAO ADMIN | Nov 12, 2019
In this activity, student mix a given quantity of salt with a fixed volume of water. Mass and volume measurements are made before and after mixing to determine if these quantities change. Students observe that mass is conserved during dissolving while volume is...
by STAO ADMIN | Nov 12, 2019
Prior to Thomson’s work it was thought that the atoms of each element were unique, invisible particles, or that atoms were made of subatomic particles that had significant mass compared to the atom as a whole. Thomson used Crookes tubes to disprove both of these ideas...
by STAO ADMIN | Nov 12, 2019
This activity is a good opportunity for students to exercise their hypothesis-generating skills, practice making quantitative observations, and apply what they have learned about the fire triangle and the gas tests. Revisit the fire triangle with students, explaining...
Recent Comments