The water cycle

9.Why does warm, moist air rise in the atmosphere?

10.What force causes water to flow downhill along the surface?

11.In the water cycle, what happens to the energy released when water vapor condenses?

12.Most of Earth's water is freshwater.

13.A student observes a puddle after a rainstorm. Over time, the puddle disappears even though the temperature is below the boiling point of water. Which process is primarily responsible for the disappearance of the puddle?

14.A water droplet in a cloud becomes large enough to fall as rain. What causes this droplet to fall?

15.A student sets up a simple experiment: a dish of water is placed on a windowsill in sunlight, and another identical dish is placed in a shaded cupboard. After a week, the water level in the sunny dish is much lower. What is the best explanation for this difference?

16.A student models the water cycle in a closed terrarium. The terrarium is sealed and placed in a sunny window. Water evaporates from the soil, condenses on the glass, and falls back as precipitation. Which of the following best describes the energy transformations that occur in this model?

17.In a closed terrarium model of the water cycle, the total amount of water in the terrarium remains constant over time.

18.A student is investigating the effect of wind on evaporation. She places two identical wet sponges in two different locations: one in a breezy area and one in a calm area. Which of the following factors should she keep constant to ensure a fair test? (Select all that apply)

19.Match each experimental setup to the water cycle process it best models.

20.A student wants to measure the rate of transpiration from a plant. Which of the following methods would be the most direct way to measure this?

21.A student places a glass of ice water on a table. After a while, water droplets form on the outside of the glass. Which process is responsible for the droplets forming?

22.Which process describes the movement of water into the ground?

23.Fill in the blank with the correct term.

24.What is the name for any location where water is stored on Earth, such as oceans, clouds, or living things?

25.Approximately what percentage of Earth's water is stored in the oceans? (Enter a number)

26.Approximately what percentage of Earth's water is stored in the oceans?

27.Complete the sentence.

28.Complete the sentence with the correct term.

29.Name the three states of matter in which water can exist in the hydrosphere.

30.In an experiment, a student measures that 50 mL of water evaporates from a container in 5 hours. What is the average rate of evaporation in mL per hour? (Enter a number)

31.Describe the pathway of a water molecule that evaporates from the ocean and eventually returns to the ocean. Include at least three processes.

32.A student claims that the water cycle is driven by both the Sun and gravity. Describe how these two forces work together in the water cycle, using specific processes.

33.The salt flats in Death Valley cover a large enclosed basin. Streams carry dissolved salts down into the basin, and the salts are left behind as mineral flats. Identify the water cycle process most directly responsible for leaving the salts behind, and explain how energy from the Sun drives that process.

34.The diagram shows a model of the water cycle with four labeled steps. Step W shows water rising from the ocean surface toward the clouds. Which change would most likely increase the movement of water during step W?

35.Complete the sentences about water moving through the Great Lakes.