The water is a repeating cycle where water evaporates, travels into the air and becomes part of a cloud, and then falls down to earth as precipiation. This cycle keeps on repeating and never ends. Molecules connect to the water cycle because the water is made up of water molecules, so the molecules repeatedly move from location to location in this cycle.

A cloud is a visible mass of water droplets and ice floating in the air, floating when water condenses. Clouds form whenever air is cooled to its dew point and particles are present. Clouds are important to the water cycle because when the water evaporates, it then becomes part of a cloud.

There are eight main types of clouds. They're all formed differently. The types of clouds that are highest in the sky are called cirrus clouds and cirrocumulus clouds. Next there are altocumulus clouds, and then altostratus clouds, then cumulonimbus clouds, then nimbostratus clouds, stratus clouds, and then cumulus clouds.

This is a cirrus cloud. It's altitude is 20,000 to 40,000 feet in the air. It's appearance is delicate, white fibers and it's made up of tiny ice crystals. It indicates a location of distant storm, and fair weather, unless the clouds are dense.

This is a cirrocumulus cloud. It's altitude is the same as a cirrus cloud, 20,000 to 40,000 feet in the air. It's appearance is thin, white, rippled layers on a mackerel sky. Just like a cirrus cloud, it's made up of tiny ice crystals. It indicates warm fronts and fair weather. If a storm is approaching, it thickens to a cirrostratus cloud.

These are altocumulus clouds. Their altitude is 8,000 to 20,000 feet in the air, and their appearance is flat bottomed masses of gray and white. It's composed of water droplets, and it indicates possible rain or a thunder storm- especially if some are extremely high in the air.

These are altostratus clouds. Their altitude is 8,000 to 20,000 feet in the air. The sun shines through thin gray fibers. It's made up of water droplets and it indicates rain or snow of long duration if the clouds are increasing.

This is a cumulonimbus cloud. It's altitude is 10,000 to 60,000 feet in the air. It's too take shape of anvils. There's trailing wisps of cirrus cloud and it has a dark base. It's composed of tiny ice crystals and water droplets. It indicates and thunderstorm and heavy rain or possibly hail, and these types of clouds are most common in the summer.

This is a nimbostratus cloud. It's altitude is below 8,00 feet. It has large, thick, gray, dark patches that block out the sun. It's composed of water droplets. It indicates long periods of rain or snow, and it develops from an altostratus cloud that has descended close to earth. It could also indicate a possible storm.

This is a stratus cloud. It's altitude is below 8,000 feet. It has a low uniform flat gray ceiling. It's composed of water droplets. It indicates source sprinkling of light snow, and it may occur after fog lifts.

This is a cumulus cloud. It's altitude is 8,000 to 45,000 feet in the air. It has dense, billowing mounds and towers. It's white at the top but has a dark base. It's composed of tiny ice crystals and water droplets. It indicates fair weather and may stretch vertically and develop into cumulonimbus rain.

This is a diagram of cloud formation.

This is the cloud formation. Cirrus clouds are the highest in the air, then cirrocumulus clouds, then altocumulus clouds, then altostratus clouds, then cumulonimbus clouds, then nimbostratus clouds, then stratus clouds, and cumulus clouds can be the lowest in the air.

Weather is the state of the atmosphere at a specific time. Weather changes frequently.

There are four main types of precipiation. There's rain, snow, sleet, and hail. Rain, snow, sleet, and hail are all made up of water. Rain is water in liquid form. Snow is water vapor that changes from a gas to a solid. Sleet is water in liquid form that freezes before it hits the ground, and hail is water that gets caught in strong winds that are going upwards. The water freezes, and then it starts falling as more water attaches to it.

Earth's atmosphere is considered a "key to life". The atmosphere contains life-supporting gases and it helps block out radiation from the sun. The atmosphere has several layers. The first layer is the troposphere, which is the bottom layer. The troposphere then flattens into a section called the tropopause. This is where the temperature flattens out. The next layer is called the stratosphere, which eventually flattens into the stratopause. The next layer is then the mesosphere, which flattens into the mesopause. The fourth layer is called the thermosphere. If you look at a diagram of the Earth's atmosphere layers, the x-axis will always be the temperature. Earth's atmosphere is heated by conduction. Earth's surface heats up during the day and then transfers heat to the air above it that it is touching.

DENSITY: Density is the compactness of something. For example, the density of water is 1g/cm3. Anything that has a density below that will float, and everything that has a density above that will sink.

HUMIDITY: Humidity is the amount of moisture in the atmosphere. Humidity is in the air. In fact, an air mass is a large body of air that hats a similar humidity, pressure, and temperature.

DROUGHT: A drought is a lack of rainfall for a long period of time. This can effect the environment in a bad way because we need water for crops and plants to grow.