Check out these links for ideas to celebrate it chemistry-style.
You can make science-themed valentines, create a borax crystal heart, learn a valentine demo to share with your sweetheart, and more.
This High School Chemistry Syllabus Resource & Lesson Plans course is a fully developed resource to help you teach chemistry.
This experiment is best used by student working in pairs.
Grade Level: 5-12 grade Disciplinary Core Ideas (DCI) 3-5ETS1-2, MS-ESS1-4, HS-ESS1-6 Time for Teacher Preparation 40-60 minutes – To gather materials Activity Time: 40-60 minutes (1 Class Period) Materials: Objectives Students try to model radioactive decay by using the scientific thought process of creating a hypothesis, then testing it through inference.
You can't tell by looking at pennies whether they're made of exactly the same materials.
The older ones are the same size as the newer ones, so they look the same.
Students should begin to see the pattern that each time they “take a half-life,” about half of the surrogate radioactive material becomes stable.
Students then should be able to see the connection between the M&M’s and Puzzle Pieces and radioactive elements in archaeological samples.
Description: With the Half-Life Laboratory, students gain a better understanding of radioactive dating and half-lives.
Students are able to visualize and model what is meant by the half-life of a reaction.
It is a great introduction to the scientific process of deducing, forming scientific theories, and communicating with peers.
It is also useful in the mathematics classroom by the process of graphing the data.
The only way to establish whether the chemical composition of the different groups of pennies is the same or different is to determine the mass (weight) of each group. A penny containing more of a certain metal than another penny will have a different mass, because its density is different.