Tag: science

Taking on Invasive Species

As part of the sixth-grade earth science curriculum, the students learned about how pests and invasive species can affect an ecosystem. One species they focused on was the Crown of Thorns (COT) sea star. They learned how the sea star’s fast reproduction and limited predators on the Great Barrier Reef are creating quite a problem for that precious ecosystem. The COTs eat the algae in the coral, which is causing the coral to die at rapid rates. Students then learned how scientists are using Remote Operated Vehicles (ROVs) to learn to identify and inject vinegar into the COTs. The vinegar dissolves them from the inside out. These ROVs can work 24 hours a day in all kinds of weather conditions. 

Ms. O had the 6th-grade students team up to create their own ROVs. With a grant from National Geographic Education, the students were able to use SeaMate Angelfish ROVs to simulate the work of the scientists out on the reef. The students had to design a frame, add motors, learn how to work their control box, and decorate their ROV.

With the ROVs completed, the students were given the challenge of collecting COT’s from the local MCC Augusta Pool. Students had to figure out how to maneuver their ROV and remove the imitation COTs from the pool.

It was amazing to see the engineering and design process happening while the students took the role of scientists. 

#SaklanHandsOn

Defying Gravity

Since February, the 8th graders have been diving into physics in science class, exploring the forces of gravity, air resistance, and friction. Through a series of engaging, hands-on labs, they’ve been putting their knowledge to the test—seeing firsthand how these forces interact and impact objects on our planet.

The students started exploring gravity and air resistance by creating different-sized parachutes and dropping them from the ceiling of the science lab. Students could see the pull of gravity on the parachutes and how air resistance could be used to slow that force down by measuring the time each took to descend. Next, students worked on designing, creating, and launching rockets to see how to defy air resistance and gravity.

Last week, the class worked with projectiles that used both vertical and horizontal motion. Different paper airplane designs created more air resistance than others. The students saw how these forces act on objects and how various features of an object can affect these forces.

This week, students took their physics learning to the next level with an exciting experience to iFly in Union City where they explored terminal velocity in a real wind tunnel! They discussed how mass, air resistance, and surface area affect falling objects, then put theory into practice by suiting up and experiencing it firsthand. Students got to “fly” in the wind tunnel, feeling the exact force needed to keep them floating or falling at terminal velocity—a thrilling, hands-on lesson in action!

Students then made guesses at which toys thrown in the wind tunnel would fall the fastest or slowest based on size, mass and surface area! A lot was learned and experienced. 

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Mission to Mars

The Hoot Owls have continued their adventure into space. One planet the students were very excited to learn more about was Mars, and especially the rovers on Mars! After watching a Mars Rover video, the students were inspired to create their own rover. After gathering useful items from around their classroom, the Hoot Owls used a huge box to create a rover. Next, the class brainstormed ways to supply the Rover with energy to move around: solar panels and batteries were the winning ideas. The class worked as a team, with some friends making solar panels while other friends made batteries to attach to the rover.

The Hoot Owls welcomed guest expert Jordan to teach them more about rovers and answer their questions. Jordan worked with the people who constructed the head for NASA’s Mars Perseverance rover. He shared that Perseverance’s head is about the size of a shoe box, and contains its eyes (cameras) and a bigger eye that is a laser, which is used to examine rocks. The students were intrigued to learn that scientists tell the rover where to go to find a special rock, then they zap the rock, which causes dust to puff up, which allows scientists to examine the dust and determine what the rocks is made of. 

Thank you, Jordan, for sharing your knowledge and experience with the Hoot Owls!

#SaklanGuestExpert

Ecosystems and Adaptations

In science, the 6th graders recently explored Earth’s biomes. Working in pairs, they created educational slideshows to teach their classmates about our planet’s incredible variety of ecosystems. Afterward, they dove deeper into the topic by examining how organisms adapt to survive in diverse environments. This culminated in an engaging “Adaptation Auction,” focusing on two contrasting ecosystems: the ocean and the desert.

The 6th graders explored the stark differences between these ecosystems, identifying particularly beneficial adaptations in each. The desert’s unique ability to preserve species, culture, and history—due to its dry climate, fewer large scavengers, and minimal decomposers—sparked fascinating discussions. To bring this concept to life, students mummified apples in class! They created a narin mixture of salt and baking soda to act as our drying agent. Students then carved a face into an apple and let it sit in the narin mixture for a week. They observed how the drying agent caused noticeable changes in size, texture, and weight after just one week.

Next, the students moved on to studying the relationships between species within ecosystems, such as mutualism, parasitism, and commensalism. They created comics that illustrate these interactions in real-world scenarios to demonstrate their understanding. Below are examples of their creative work.

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Plate Tectonics and Natural Forces

Saklan sixth graders recently dove into the fascinating world of plate tectonics and the powerful forces shaping our planet. They explored how Earth’s tectonic plates float on the molten, magma-filled mantle beneath us, driving some of the most dramatic movements we experience. The students investigated the concept of Pangea—the idea that all continents were once joined as a single landmass—and learned how plate boundaries have caused continents to gradually drift apart, creating the world map we recognize today. They studied divergent plates that push apart, convergent plates that move together, transform faults where plates slide past each other, and subduction zones where one plate moves under another.

Their studies then shifted to what some might call “natural disasters,” though the class viewed them as incredible demonstrations of Earth’s energy. The students examined tsunamis triggered by underwater seismic activity and researched historic earthquakes. They even created their own news reports to illustrate the impact of these events on different cultures and how earthquakes have contributed to the planet’s evolution over recorded time.

Their exploration of tectonic movement continued with lessons on hot spots and subduction zones, which led to the formation of volcanoes. The sixth graders examined volcanic rocks to understand how scientists determine the type of past volcanic eruptions. Students learned that rocks filled with many holes were formed from lava with high gas content, while rocks without holes contained more silica.

Working in teams, students designed their own volcanoes and experimented with various lava “recipes” to observe different lava flows—some slow and smooth, others fast and bubbly.

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Bonding in Action

In 8th grade science, students engage in interactive experiments to build a solid knowledge of chemistry. Recently they have been studying chemical bonds. They started exploring ionic and covalent bonds by building on their knowledge of the periodic table and the properties of metals, metalloids, and nonmetals.

Last week, the eighth graders learned how to identify each type of bond, draw representations, recognize bonding types, and correctly create and name chemical formulas. They also investigated polarity within covalent bonds. In covalent bonds, atoms share electrons to form connections. However, because some atoms have more protons (positive charges) in their nuclei, they can pull these shared electrons more strongly, creating a compound with positive and negative ends—similar to a magnet.

The students used food coloring and milk to help them visualize this concept. Milk contains nonpolar fat molecules, while food coloring is polar. Since polar and nonpolar substances don’t mix easily, adding soap, which has both polar and nonpolar ends, acts like a magnet, pulling the food coloring across the milk, and creating a colorful swirl without stirring. The students were fascinated by this vivid demonstration of polarity in action!

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