Category: Worksheets
-
Investigation: Osmosis and Water Potential
Students models osmosis using dialysis tubes that contain different concentrations of sucrose. The tubes will gain water dependent upon the molarity of solution they are placed in. You can make sucrose solutions with table sugar, and instructions are included in the teacher’s guide to the lab. The second part of the investigation determine the…
-
First Day Activity: Student Inventory
The first day of class is often very chaotic as you are taking roll, talking to students about classroom rules and beginning to learn their names. For my classes, I also like to make notes about students on the seating chart about personal details of students, mainly because this makes it easier to learn…
-
Investigation: What Factors Affect the Heart Rate of Daphnia
This investigation starts with a guided procedure where students gather data on the heart rate of daphnia when the organism is exposed to 1% ethanol. Daphnia are tiny crustaceans that are visible with the naked eye, though a microscope or stereoscope will be needed to see their heart rate.
-
Investigation: Photosynthesis and Leaf Discs
As photosynthesis takes place, oxygen is released and causes the leaf to float. The number of floating disk is a measure of the rate of photosynthesis.
-
Investigation: Enzymes Activity with Catalase
Have you ever noticed that when you pour hydrogen peroxide on a wound, it bubbles? The reason is that bacteria and your own tissue contains an enzyme that breaks down the peroxide. Peroxide splits into a molecule of water and a molecule of oxygen, which causes the bubbles. In a series of tests, students observe…
-
External Anatomy of the Grasshopper
Dissection guide for the grasshopper. Focuses on the external anatomy: legs, mouth parts, segments, includes a labeling and coloring.
-
What Can Bird Beaks Tell You About Their Lifestyle?
Worksheet showing bird images where students determine their lifestyle based on the shape of their beaks and feet.
-
Case Study: How Do Bacteria Become Resistant?
Students analyze data regarding methicillin and penicillin resistant bacteria, focusing how hospitals inadvertently drive the evolution of resistant strains. Each section of the case explores an aspect of dealing with bacteria, including sanitation, analyzing agar plates uses the Kirby-Bauer disk method and concludes with students suggesting plans for reducing the incidence of MRSA in hospitals. With…
-
Investigation: What Are the Different Types of Cells?
Students look at cells from different domains and kingdoms; compare the size of cells and how their structure and shape differ depending on their function.