Which of the following is responsible for many of water’s unique qualities? (LT 1.1a)
Hydrogen bonding
Surface tension
Adhesion
Its low molecular mass
Amanda and Pol were learning about properties of water in science lab. They were given a sample of water, a graduated cylinder, a beaker, a toothpick and a piece of wax paper to make observations with. Answer the following 3 questions based on your understanding of the properties of water and their observations.
Question 2
2.
Question 3
3.
Question 4
4.
Water molecules are polar, with the ____. (LT 1.1a)
oxygen side being slightly negative and the hydrogen side being slightly positive
oxygen and hydrogen sides being slightly negative
oxygen side being slightly positive and the hydrogen side being slightly negative
oxygen and hydrogen sides being slightly positive
Water makes up approximately 60% of the human body and plays a vital role in regulating body temperature. Which property of water makes it good at regulating temperature? (LT 1.1b)
Water exhibits strong cohesion
Water has a high capacity for heat
Water has an unusual crystalline structure
Water is a good solvent
Many fish and aquatic plants can survive a cold winter because the layer of ice that forms at the top of the lake insulates the water below and prevents the lake from freezing solid. What unique property of water contributes to this effect? (LT 1.1b)
Water at the bottom of the lake prevents the fish and plants from freezing because it is a universal solvent, while water at the top of the lake evaporates and forms a gas.
Water at the top of the lake floats over the water on the bottom of the lake because of capillary action, while water at the bottom of the lake forms a solution with nutrients in the water.
Water at the bottom of the lake does not freeze due to high heat capacity and resistance to breaking hydrogen bonds, while water on the top of the lake forms a less dense crystalline structure.
Water at the top of the lake freezes because it absorbs heat when it evaporates and forms a gas, while water at the bottom of the lake absorbs heat from the ground due to high heat capacity.
Water is important to life because it _____. (LT 1.1b)
is a universal solvent
all of the answer choices
is found inside cells
absorbs large amounts of heat before its own temperature rises
After you eat lunch, the foods are broken down in your stomach. The nutrients are then carried through your bloodstream to all the cells in your body. The ability to dissolve and transport the nutrients in your blood is due to which property of water: (LT 1.1b)
Solubility
Thermal regulation
Adhesion
Cohesion
Capillary action is the combination of the adhesion attracting water to the sides of thin charged tubes and cohesion of the water in the middle to the water on the sides. This allows water to move without any energy input. Which of the following is an example of this property performing an essential function in living organisms? (LT 1.1b)
Water evaporating off a dog’s tongue as it pants to cool off
Water moving up from the roots of plants through xylem to the tips of the leaves
Water rolling down the windshield of a car in a rainstorm and collecting into larger droplet
Water moving down your esophagus as you swallow
When Amanda poured some of the liquid in a test tube, she noticed that the edges of the water curved upward. The water curving up on the sides was an example of: (LT 1.1a)
Heat capacity because the water molecules are expanding in the tube
Adhesion because the water molecules were sticking to the sides of the tube
Cohesion because the water molecules were sticking to the sides of the tube
Surface tension because the water molecules were sticking to each other
Pol was asked to drop water droplets on a piece of wax paper. He then used the toothpick to drag one droplet to the next droplet. His observation was that the water droplets increased in size and volume. (LT 1.1a)
Cohesion because the water molecules were sticking to each other
Adhesion because the water molecules were sticking to each other
Heat capacity because the water molecules were expanding on the wax paper
Capillary action because the water droplets are floating on top of the rest of the water
When Amanda added food coloring to the first test tube and shook it, she noted that the food coloring dispersed through the tube. Why did this happen? (LT 1.1a)
The food coloring and the water formed a solution where the food coloring molecules were evenly distributed in the tube.
The food coloring became a solvent that surrounded the water molecules and increased the surface tension of the water.
The food coloring is a universal solvent that can dissolve some ionic compounds and polar molecules.
The water expanded and formed uniform bonds around the dye molecules.