This is the perfect way to demonstrate to my fourth grade scientists how biotic factors and abiotic factors are interdependent in an ecosystem. The water and the wastes from the fish are pumped up to the plants and then the clean water is cycled back down to the fish. We are growing wheat grass and radish sprouts from organic seeds.
Engineers are given a problem to solve and then they design a solution. I asked my youngest engineers to build a tower after looking at examples of towers. They had 25 cups and 10 strips of card-stock. We discovered that sometime our ideas don’t work the first time and we need to try again and use what we learn to improve our designs. We investigated the concept of balance though this project.
Third grade scientists investigated compasses in lab to kick off their social studies unit on explorers. After reviewing the compass rose, we experimented with the relationship between magnets and compasses. A compass is a lightweight magnet. The needle lines up with the earth’s magnetic field. Then we made our own compasses. We magnetized a nail and placed the nail in a Petri dish that was floating in a bowl of water. We watched the magnetized nail search for North.
“A great way to encourage girls’ interest in STEM (science, technology, engineering, and math) fields is by sharing stories starring girls and women who love science and technology!” Go to this site to find 25 books starring science-loving girls. Click here.
Pre-First ornithologists continued their study of birds and made mini bird feeders. We hollowed out oranges and filled them with safflower seeds. They hung them outside their classroom window near their bird feeders.
Mrs. Bowman shot this video as she got out of her car at King’s Ridge on Tuesday morning. Click here to watch the video. She thought they were bats, but discovered they were actually moths. When I went outside as the sun rose, only one remained visible. He flew away after I took his picture. Look at the large spots on their wings that look like owl eyes. It is a great defense mechanism to scare away predators!
I did some research on these silk moths. Click here.
A BIG thank you for the science treasures that Drake and his dad shared with us. It was especially interesting looking at the teeth on these skulls. Flat teeth told us that we were looking at the skull of an herbivore. Have you seen a beaver’s front teeth? Look at the stick he chewed in the box.
Third grade scientists observed Drinking Bird and tried to determine the science behind the movement. Watch the video first to see if you can determine what is happening. Click here to watch our Drinking Bird.
I dipped the bird’s beak into the water. As the water evaporates and the head cools, fluid moves up into the head, causing the bird to become top-heavy and dip forward. Once the bird dips forward, fluid moves back into the abdomen, causing the bird to become bottom-heavy and tip up.