After students conduct the two associated activities, Density Column Lab - Parts …
After students conduct the two associated activities, Density Column Lab - Parts 1 and 2, present this lesson to provide them with an understanding of why the density column's oil, water and syrup layers do not mix and how the concepts of density and miscibility relate to water chemistry and remediation. Topics covered include miscibility, immiscibility, hydrogen bonds, hydrophobic and hydrophilic. Through the density column lab activities, students see liquids and solids of different densities interact without an understanding of why the resulting layers do not mix. This lesson gives students insight on some of the most fundamental chemical properties of water and how it interacts with different molecules.
These two hands-on labs are about the role of temperature and salinity …
These two hands-on labs are about the role of temperature and salinity in governing the density of seawater, a major factor controlling the ocean's vertical movements and layered circulation. In the first activity students work in groups to determine the density of tap water and of tap water with salt, then compare the densities. The second activity investigates the role of temperature and salinity in determining seawater density. Students use a Temperature-Salinity (T-S) Diagram to examine the effect of mixing on density. A list of key concepts, essential questions, common preconceptions and more is included. These are part of the Aquarius Hands-on Laboratory Activities.
Learners will build an open spectrograph to calculate the angle the light …
Learners will build an open spectrograph to calculate the angle the light is transmitted through a holographic diffraction grating. After finding the desired angles, the students will design their own spectrograph using the information learned. The activity is part of Project Spectra, a science and engineering program for middle-high school students, focusing on how light is used to explore the Solar System.
In this activity, students investigate different methods (aeration and filtering) for removing …
In this activity, students investigate different methods (aeration and filtering) for removing pollutants from water. They will design and build their own water filters.
Students demonstrate the erythrocyte sedimentation rate test (ESR test) using a blood …
Students demonstrate the erythrocyte sedimentation rate test (ESR test) using a blood model composed of tomato juice, petroleum jelly and olive oil. They simulate different disease conditions, including rheumatoid arthritis, anemia, leukocytosis and sickle-cell anemia, by making appropriate variations in the particle as well as in the fluid matrix. Students measure the ESR for each sample blood model, correlate the ESR values with disease conditions and confirm that diseases alter blood composition and properties. During the activity, students learn that when non-coagulated blood is let to stand in a tube, the red blood cells separate and fall to the bottom of the tube, resulting in a sediment and a clear liquid called serum. The height in millimeters of the clear liquid on top of the sediment in a time period of one hour is taken as the sedimentation rate. If a disease is present, this ESR value deviates from the normal, disease-free value. Different diseases cause different ESR values because blood composition and properties, such as density and viscosity, are altered differently by different diseases. Thus, the ESR test serves as a real-world diagnostic screening test to identify indications of the presence of any diseases in people.
Description de la matière - Propriétés physiques - Propriétés chimiques - Classer …
Description de la matière - Propriétés physiques - Propriétés chimiques - Classer la matière - Les substances pures - Les mélanges
*Vidéos annexes: Alloprof (les propriétés caractéristiques et les propriétés non caractéristiques, analyser la formule chimique d’une substance), Thierry Meyer ( les grandeurs intensives et les grandeurs extensives), Maître Lucas (différents types de mélanges)
An engineering and design lesson for middle school (our 7th grade standards). …
An engineering and design lesson for middle school (our 7th grade standards).
In the aftermath of a natural disaster, can you engineer a device that will keep medicine within a 40-60°F range using natural resources from the biome you live in, and/or debris created by the disaster for three days, until the Red Cross can arrive?
You are a team of relief workers in __________________after a major earthquake/tsunami has occurred. Your team lead as just told you about a young women with diabetes has been injured and needs insulin to be delivered __________ miles away (no open roads). Your team will need to research, design, and build a portable device to keep the insulin between _____ and ______ °(F/C) for _____ days. Once you return you will present the effectiveness of your device to your lead and a team other relief workers showing your both your design/device and explaining the process.
To gain an understanding of mixtures and the concept of separation of …
To gain an understanding of mixtures and the concept of separation of mixtures, students use strong magnets to find the element of iron in iron-fortified breakfast cereal flakes. Through this activity, they see how the iron component of this heterogeneous mixture (cereal) retains its properties and can thus be separated by physical means.
The CLS provides educational resources for middle and senior years teachers across …
The CLS provides educational resources for middle and senior years teachers across Canada that relate to curriculum. Resources in the following topics have been developed: Light and Optics; Science and Society; Physical Sciences; Earth Sciences; Health Sciences; Chemistry; Physics; Biology.
This is a hands-on lab activity about the chemical composition and conductivity …
This is a hands-on lab activity about the chemical composition and conductivity of water. Working in groups, learners will: conduct an experiment involving the process of electrolysis, prepare an experiment to better understand the process of ion exchange, discuss and research the "softness" and "hardness" of water, and use the periodic table to identify elements and learn their characteristics. Background information, a glossary and more is included. Materials needed for each student group include a 9-volt battery, two electrodes (e.g. copper strips, or two #2 pencils sharpened at both ends), electrical wire and glass beakers or ceramic saucers. This activity is part of the Aquarius Hands-on Laboratory Activities.
The computer will give you a list of chemical symbols and a …
The computer will give you a list of chemical symbols and a list of chemical names. Choose the chemical name that each chemical symbol represents. Press the 'Check my answers!' button after you have made your choices.
Students gain a better understanding of the different types of materials as …
Students gain a better understanding of the different types of materials as pure substances and mixtures and learn to distinguish between homogeneous and heterogeneous mixtures by discussing an assortment of example materials they use and encounter in their daily lives.
80+ Free Science Activities to Entertain your Kids in the following areas: …
80+ Free Science Activities to Entertain your Kids in the following areas: BIOLOGY ACTIVITIES EARTH SCIENCE AND ASTRONOMY ACTIVITIES CHEMISTRY ACTIVITIES PHYSICS ACTIVITIES FREE SCIENCE GAME PACKETS SCIENCE ACTIVITY ROUND-UPS SCIENCE PLUS
The students participate in many demonstrations during the first day of this …
The students participate in many demonstrations during the first day of this lesson to learn basic concepts related to the forms and states of energy. This knowledge is then applied the second day as they assess various everyday objects to determine what forms of energy are transformed to accomplish the object's intended task. The students use block diagrams to illustrate the form and state of energy flowing into and out of the process.
Under the "The Science Behind Harry Potter" theme, a succession of diverse …
Under the "The Science Behind Harry Potter" theme, a succession of diverse complex scientific topics are presented to students through direct immersive interaction. Student interest is piqued by the incorporation of popular culture into the classroom via a series of interactive, hands-on Harry Potter/movie-themed lessons and activities. They learn about the basics of acid/base chemistry (invisible ink), genetics and trait prediction (parseltongue trait in families), and force and projectile motion (motion of the thrown remembrall). In each lesson and activity, students are also made aware of the engineering connections to these fields of scientific study.
Students learn about the periodic table and how pervasive the elements are …
Students learn about the periodic table and how pervasive the elements are in our daily lives. After reviewing the table organization and facts about the first 20 elements, they play an element identification game. They also learn that engineers incorporate these elements into the design of new products and processes. Acting as computer and animation engineers, students creatively express their new knowledge by creating a superhero character based on of the elements they now know so well. They will then pair with another superhero and create a dynamic duo out of the two elements, which will represent a molecule.
Students explore the chemical identities of polymeric materials frequently used in their …
Students explore the chemical identities of polymeric materials frequently used in their everyday lives. They learn how chemical composition affects the physical properties of the materials that they encounter and use frequently, as well as how cross-linking affects the properties of polymeric materials.
Students study an ancient bronze statue, analyze its pose, and discover how …
Students study an ancient bronze statue, analyze its pose, and discover how conservators remove and prevent corrosion. They learn that the bronze used to make this sculpture is an alloy of copper and tin with small amounts of antimony, lead, iron, silver, nickel, and cobalt. They use the periodic table to research the chemical formulas of compounds used to make bronze. After learning about oxidation-reduction reactions that occurred in the statue, students speculate about the conservation techniques needed to conserve the bronze sculpture.
Students study an ancient bronze statue, analyze its pose, and discover how …
Students study an ancient bronze statue, analyze its pose, and discover how conservators remove and prevent corrosion. They learn that the bronze used to make this sculpture is an alloy of copper and tin with small amounts of other elements. They use the periodic table to research the chemical formulas of compounds used to make bronze. Students compare conservation techniques in two ancient bronze objects.
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