# Zack Moore's Water Cycle Practice

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Have you covered the water cycle in class and are about to have an assessment quiz on it soon? Worry not as this Zack Moore's Practice Quiz for the Water Cycle Unit below is exactly what you need to ensure you are ready to tackle the quiz. Why don't you try it out and see if you need extra revision time?

• 1.

### What amount of the earth's surface is covered by water?

• A.

1/2

• B.

1/3

• C.

3/4

C. 3/4
Explanation
Approximately 71% of the Earth's surface is covered by water, which is closer to 3/4 than any other given option. This includes the oceans, seas, lakes, rivers, and other bodies of water. The vast amount of water on Earth is essential for supporting various ecosystems and plays a crucial role in regulating the planet's climate.

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• 2.

### What percent of the earth's water is fresh water?

• A.

1%

• B.

2%

• C.

3%

C. 3%
Explanation
Approximately 3% of the earth's water is fresh water. This includes water in rivers, lakes, and underground sources. The majority of the earth's water, about 97%, is saltwater found in the oceans. Freshwater is a valuable resource that is essential for human consumption, agriculture, and various other purposes. Given the limited availability of fresh water, it is crucial to conserve and manage this resource efficiently.

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• 3.

### Water can be absorbed into soil and porous rocks?  Porous rocks are rocks with holes.

• A.

True

• B.

False

A. True
Explanation
Water can be absorbed into soil and porous rocks because both soil and porous rocks have empty spaces or pores that can hold and retain water. These pores allow water to infiltrate and be stored within the soil or rock structure. The presence of these empty spaces enables the absorption of water, making the statement true.

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• 4.

### _________ are huge, slow moving masses of ice and snow

glaciers
glac
Explanation
Glaciers are large, slow-moving masses of ice and snow. They form over many years as snow accumulates and compresses into ice. Glaciers can be found in polar regions as well as in high mountain ranges. They flow downhill due to their own weight, carving out valleys and shaping the landscape. Glaciers are important for the Earth's climate system as they store and release freshwater, and they also provide habitats for various species.

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• 5.

### Water that runs off land and into streams and rivers is called ____________?

runoff
run off
runoff water
Explanation
The correct answer is "runoff," which refers to the water that flows over the land surface and into streams and rivers. It is the result of precipitation, such as rain or snow, that does not infiltrate into the ground or get absorbed by plants. "Run off" and "runoff water" are alternative ways of expressing the same concept.

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• 6.

### When you freeze water it becomes a solid called

• A.

Rock

• B.

Ice

• C.

Water vapor

B. Ice
Explanation
When water is frozen, it undergoes a phase change and transforms into a solid called ice. Freezing occurs when the temperature of water drops below its freezing point, causing the water molecules to slow down and arrange themselves in a regular pattern. This results in the formation of a solid structure with a fixed shape and volume. Ice is commonly found in nature, such as in glaciers, icebergs, and snow, and is also used for various purposes, including cooling and preservation.

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• 7.

### When you melt something like ice it changes from a solid to

• A.

Gas

• B.

Liquid

• C.

Jonny Flynn

B. Liquid
Explanation
When ice is melted, it changes from a solid state to a liquid state. This is because the heat energy applied to the ice causes the water molecules to gain enough energy to break their rigid arrangement and move more freely. As a result, the ice melts and becomes a liquid. The process of melting involves the transition from a solid phase to a liquid phase, not a gas phase.

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• 8.

### When you heat water it __________ and becomes a gas called water vapor

• A.

Precipitates

• B.

Evaporates

• C.

Condensates

B. Evaporates
Explanation
When water is heated, it undergoes a process called evaporation, where it changes from a liquid state to a gaseous state, forming water vapor. This occurs because the heat energy provided to the water molecules increases their kinetic energy, causing them to move faster and break the intermolecular forces holding them together. As a result, the water molecules escape from the liquid surface and enter the air as water vapor.

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• 9.

### What helps water to evaporate?

• A.

Sun

• B.

Moon

• C.

Nathan H

A. Sun
Explanation
The sun helps water to evaporate. Sunlight provides the necessary energy to break the bonds between water molecules, allowing them to escape into the air as vapor. This process is known as evaporation. The sun's heat increases the temperature of the water, increasing the kinetic energy of the water molecules and causing them to move faster. As a result, more water molecules gain enough energy to overcome the attractive forces holding them together and transform into a gaseous state.

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• 10.

### ______________ is when liquid water is changed to a gas called water vapor through heating

• A.

Respiration

• B.

Precipitation

• C.

Evaporation

C. Evaporation
Explanation
Evaporation is the process by which liquid water is converted into water vapor through the application of heat. It occurs when the energy from heat causes the water molecules to gain enough kinetic energy to break free from the liquid phase and enter the gaseous phase. This process is essential for the water cycle as it allows water to be transferred from the Earth's surface back into the atmosphere.

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• 11.

### ___________ is the process by which gas changes to a liquid

condensation
cond
Explanation
Condensation is the process by which gas changes to a liquid. It occurs when the temperature of a gas is lowered, causing the gas molecules to slow down and come closer together. As a result, the gas molecules lose energy and form bonds with each other, forming a liquid. This process is commonly observed when warm, moist air comes into contact with a cold surface, such as when water vapor in the air condenses on a cold window pane. Condensation is an important part of the water cycle and is responsible for the formation of clouds, rain, and other forms of precipitation.

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• 12.

### ______________ is when water falls back to the earth in the form of rain, snow, sleet or hail

precipitation
prec
Explanation
Precipitation refers to the process by which water vapor in the atmosphere condenses and falls back to the Earth in the form of rain, snow, sleet, or hail. It is an essential part of the water cycle and plays a crucial role in replenishing the Earth's water resources. The term "prec" is an abbreviation for precipitation, which is commonly used in weather forecasts and discussions.

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• 13.

### The amount of water vapor in the air is known as _____________.

humidity
hum
Explanation
The correct answer is humidity. Humidity refers to the amount of water vapor present in the air. It is a measure of how saturated the air is with water vapor. Humidity plays a crucial role in weather patterns and can affect our comfort levels. Hum, on the other hand, is not a commonly used term to describe the amount of water vapor in the air.

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• 14.

### ________________ are formed when water vapor cools and condenses on tiny solid particles of dust or smoke

• A.

Ocean tides

• B.

Snow flakes

• C.

Clouds

C. Clouds
Explanation
Clouds are formed when water vapor cools and condenses on tiny solid particles of dust or smoke. This process occurs in the atmosphere, where the water vapor rises and encounters these particles, causing the vapor to condense into tiny water droplets or ice crystals. These droplets or crystals then come together to form clouds, which can range in size, shape, and altitude. Therefore, clouds are the correct answer to the given question.

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• 15.

### Most of the water on the Earth is in the oceans.   The water in the oceans is ________ water.  Hint:  This is also put on food and is not healthy.  It is white particles and is kept in a shaker.

salt
Explanation
The correct answer is salt. The hint provided suggests that the substance being referred to is white particles that are put on food and is not healthy. Salt fits this description as it is commonly used as a seasoning and excessive consumption can have negative health effects. Additionally, it is well-known that the oceans contain a high concentration of salt, making it the most likely answer.

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• 16.

### When air cools, water vapor condenses and turns back into

• A.

Liquid

• B.

Solid

• C.

Gas

A. Liquid
Explanation
When air cools, the temperature decreases, causing the water vapor present in the air to lose energy. As a result, the water vapor molecules slow down and come closer together, forming liquid water droplets. This process is known as condensation. Therefore, when air cools, water vapor condenses and turns back into liquid.

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• 17.

### The __________ is the constant movement of water between the earth and atmosphere

• A.

Energy cycle

• B.

Bicycle

• C.

Water cycle