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Ms. Crowder's Classroom Edit display name

  • Shorewood High School
  • Shoreline, WA
  • More than a third of students from low‑income households Data about students' economic need comes from the National Center for Education Statistics, via our partners at MDR Education. Learn more

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These balances will allow students to measure even small changes in mass. Through exploring real life systems (radishes growing, mealworms eating), students will be able to trace matter as it is moved and changed by life processes such as cellular respiration and photosynthesis. These foundational processes are difficult to understand and students enter my class with many misconceptions. By measuring mass changes, students will be able to "see" matter as it moves into and out of organisms. With actual examples to put their hands on, students will develop a deeper understanding of these processes. The balances will be used to measure the very small mass of radish seeds. Once the seeds grow (just in water, no soil), students will dry the seedlings and measure the mass again. This will help students learn that the mass of plants comes not from the soil or the water, but rather from the air. This means that even the tallest trees are mostly made of air! You eat about 2000 pounds of food in a year but hopefully, you don't gain 2000 pounds a year. Where does all that mass go? By measuring the mass of mealworms and their food, students will learn that the food loses more mass than the mealworm gains (just like in humans). Since students will also measure the mealworms poo, they will learn that most of the mass that goes into mealworms when they eat, actually gets breathed out as CO2. This means that what you eat mostly ends up as carbon dioxide that you then breathe out. When you lose weight, you actually breathe out the extra mass!

About my class

These balances will allow students to measure even small changes in mass. Through exploring real life systems (radishes growing, mealworms eating), students will be able to trace matter as it is moved and changed by life processes such as cellular respiration and photosynthesis. These foundational processes are difficult to understand and students enter my class with many misconceptions. By measuring mass changes, students will be able to "see" matter as it moves into and out of organisms. With actual examples to put their hands on, students will develop a deeper understanding of these processes. The balances will be used to measure the very small mass of radish seeds. Once the seeds grow (just in water, no soil), students will dry the seedlings and measure the mass again. This will help students learn that the mass of plants comes not from the soil or the water, but rather from the air. This means that even the tallest trees are mostly made of air! You eat about 2000 pounds of food in a year but hopefully, you don't gain 2000 pounds a year. Where does all that mass go? By measuring the mass of mealworms and their food, students will learn that the food loses more mass than the mealworm gains (just like in humans). Since students will also measure the mealworms poo, they will learn that most of the mass that goes into mealworms when they eat, actually gets breathed out as CO2. This means that what you eat mostly ends up as carbon dioxide that you then breathe out. When you lose weight, you actually breathe out the extra mass!

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About my class

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