Why do you have to clean a fish tank and not a pond Mystery Science?
Why do you have to clean a fish tank but not a pond? a fish tank doesn’t have consumers or animals like a pond does. a fish tank doesn’t have decomposers or plants like a pond does.
How do boats find their way in the fog mystery Doug?
Like cars on a road, boats on a bay use color and sound to find their way around. These activities let students explore their own skills of watching and listening, and practice some of the sound words they hear every day.
Why did the dinosaurs go extinct Mystery Science?
In this Mystery, students investigate the hypothesis that an asteroid impact caused the extinction of the dinosaurs. … Using this model, they follow the flow of energy through the food web and figure out why dinosaurs went extinct but some other animals survived.
What can lower carbon dioxide in a pond?
Carbon dioxide can be removed by chemical treatment of pond water with liming agents such as quicklime, hydrated lime or sodi- um carbonate (Table 2). These lim- ing agents chemically react direct- ly with carbon dioxide, resulting in reduced carbon dioxide and increased alkalinity and pH.
What does fog look like?
Fog is a cloud that touches the ground. … Fog shows up when water vapor, or water in its gaseous form, condenses. During condensation, molecules of water vapor combine to make tiny liquid water droplets that hang in the air. You can see fog because of these tiny water droplets.
Why is fog dangerous?
Fog is dangerous to those on the water because it can form quickly and catch boaters off guard. Because of the time it can take to stop or turn a marine vessel, we usually consider fog as “dense” for mariners if it reduces visibility to less than 1 mile.
Is fog a weather condition?
Fog is a natural weather conditions that can cause visibility to become zero. … First it is important to understand that fog is basically a cloud on the ground. This means like clouds it is a collection of tiny water droplets formed when evaporated water is cooled. The way it is cooled determines how fog is formed.
Can you outrun a dinosaur Mystery Science?
Students will try to “outrun” a dinosaur by taking larger steps than the dinosaur took. Using a number line, students will calculate the “stride length” of their classmates. Using a graph, students will also figure out whether their classmates could outrun a stegosaurus, a Tyrannosaurus rex, or a triceratops.
Which is not an example of evidence that dinosaurs looked like big reptiles?
Scientists found imprint fossils of scaly dinosaur skin. Dinosaurs laid eggs. Which is NOT an example of evidence that dinosaurs looked like big reptiles? Dinosaur skulls had similar skulls to reptiles today.
Why did some animals go extinct while other animals survived?
Extinction is often caused by a change in environmental conditions. If conditions change more quickly than a species can evolve, however, and if members of that species lack the traits they need to survive in the new environment, the likely result will be extinction. …
What kinds of living things take away carbon dioxide from the pond Why?
Phytoplankton, literally “wandering plants,” are microscopic algae that float in the open water and give it a green appearance. They carry out photosynthesis using carbon dioxide that is dissolved in the water and release oxygen that is used by the bacteria and animals in the pond.
What lives in a pond and needs carbon dioxide to survive?
Carbon dioxide, also called CO2, is found in water as a dissolved gas. It can dissolve in water 200 times more easily than oxygen. Aquatic plants depend on carbon dioxide for life and growth, just as fish depend on oxygen. Plants use carbon dioxide during the process of photosynthesis.
How is carbon dioxide removed from a lake?
Removing Carbon Dioxide from Water: Carbon Dioxide can be easily dissipated by aeration. It can be removed also by two column deionization, or by raising the pH above 8.5 by injecting Soda Ash.