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Categories: Lab/Student Activity, Teacher Demonstration
This demonstration/activity involves the safe production of oxygen, hydrogen, and carbon dioxide gases, as well as the appropriate results for tests used to identify these gases. read moreCategories: Teacher Demonstration
When you gaze up in the night sky some stars will be very bright while other stars are barely visible to the unaided eye. With the aid of binoculars you may be able to observe different colours in the stars. The brightness and colour of a star depends on three... read moreCategories: Lab/Student Activity
There are eight planets in the solar system in two distinct groupings. The four inner terrestrial planets (Mercury, Venus, Earth, and Mars) are very small and relatively close together. The outer planets or gas giants (Jupiter, Saturn, Uranus, and Neptune) are very... read moreCategories: Lab/Student Activity
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... read moreCategories: Lab/Student Activity
The Moon is visible at some point during most nights. If you observed the Moon from one night to the next you would notice that the Moon rises 50 min later each night. With close observation you would see a little bit more or a little bit less of the Moon each night,... read moreCategories: Lab/Student Activity
Burning fossil fuels releases carbon dioxide, CO2(g), which contributes to the greenhouse effect and hence to climate change. Burning some fossil fuels also releases nitrogen oxides and sulfur dioxides. These gases react with moisture in the air to produce acid... read moreCategories: Lab/Student Activity
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... read moreCategories: Lab/Student Activity, Teacher Demonstration
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... read moreCategories: Lab/Student Activity, Teacher Demonstration
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... read moreCategories: Lab/Student Activity, Teacher Demonstration
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... read more