Directions: Answer the following questions briefly but substantially 1. What is cohesion? 2. Why do some water insects able to walk on water? Explain. 3. Define adhesion. 4. Explain how adhesion and cohesion help plants move materials. 5. When is water the densest? 6. Explain why ice floats. 7. How is a lake or a river that freezes over helpful to the organisms in the water? 8. What property is responsible when water get to the leaves in the top of the tallest trees against the force of gravity? Explain. 9. Why is solid water less dense than liquid water?