For such a simple molecule, its incredible importance cannot be overstated. Learn about water with these worksheets.

This life allowing compound this formed when two atoms of hydrogen form a covalent bond with an atom of oxygen. It is the most common substance found on planet Earth, yet two and half billion people on Earth do not have access to clean form of it to drink. Two-thirds of all the Earth’s fresh water is found frozen and entombed in glaciers. The rest is found in the ground. A gallon of this substance weighs approximately eight pounds. The compound has several unique properties. Because of the high specific heat of water, it doesn’t change temperature anywhere near as fast as air. This is why it may be hot outside, but a pool or lake is still freezing. When it changes form from a liquid to a solid (freezes) it expand in size just about ten percent larger. If all of the water on Earth-fresh and salt, underground and above, solid, liquid, and vapor-was collected, it would form a sphere with a diameter of about 860 miles, and a volume of approximately 332.5 million cubic miles (a cubic mile of water contains about 1.1 trillion gallons)! This collection of worksheets introduces students to water: where it came from, how it gets to the tap, and how important it is to the body. Questionnaire sheets and answer keys are provided.

This series of worksheets will explore common questions about this substance that is commonly on all our minds. We will find out where it comes from and how it got on Earth in the first place. We will also look at unique properties of it nature in the form of waves and floating ice. Fun Fact: Water can dissolve more substances than any other liquid. Some scientists refer to it as the "Universal Solvent."

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Tap vs. Bottled Reading Passage

Did you know that we drink over eight billion gallons of bottled water a year?

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Tap vs. Bottled - Multiple Choice Questions

Here's something you probably didn't know: 25% of the bottled version comes right from the same place as tap version comes from - the city water plant.

Short Answer Questions

The Environmental Protection Agency (EPA) makes sure your tap water is safe to drink, while the bottled forms are checked by the Food & Drug Administration (FDA).

The Importance of Drinking Water - Reading Passage

Water is the most important compound in your body, up to 60% of your body is actually made up of it.

Importance - Multiple Choice Questions

Other beverages can help replenish your body, but this compound is the best choice. Juices and sports drinks, for example, contain lots of sugar.

Short Answer Questions

There have even been studies proving that drinking water before bed helps you sleep better and awaken more refreshed.

From In the Ground to In Your Glass - Reading Passage

You can’t tell if water is good to drink simply by looking at it. Most of the bacteria and harmful chemicals are impossible to see with the naked eye.

Multiple Choice Questions

Your tap is cleaned through an extensive process. It starts with screening, where it is sifted to remove large objects like rocks or clumps of dirt.

Short Answer Questions

Nanotechnology is a new method to purify water that is better and cheaper than the current methods.

How Did Water Get To Earth, Anyway? - Reading Passage

Ever wonder how this compound got on the Earth in the first place? Or how the continents were formed?

Multiple Choice Questions

Because there weren’t mountains in the early development of the earth, the water eventually covered the whole planet.

Short Answer Questions

The most popular theory is that the Earth was hit by an asteroid, moon, or small planet.

Salt vs. Freshwater Fish - Reading Passage

There are three types of water in which fish live - freshwater, brackish, and salt or sea water.

Multiple Choice Questions

Freshwater fish are the most popular fish to keep as pets. In fact, most pet stores only stock freshwater fish.

Short Answer Questions

Salt water, or marine fish are much more expensive to buy than freshwater fish. They also are harder to care for, because you must pay closer attention to the chemistry of your tank.

Why Do Ponds Freeze When The Ocean Doesn't?

Ponds and lakes hardly ever freeze all the way to the bottom. Usually just the top foot of the water freezes solid, which enables fish and other creatures to live underneath, protected from the cold air.

Multiple Choice Questions

Salt water also needs temperatures colder than 32 degrees Fahrenheit to freeze.

Short Answer Questions

At the North and South poles, sometimes sheets of water will freeze and float around.

How Does Water Get Into My House? - Reading Passage

How you get your water depends on where you live. If you live in a city, you have a city plant and if you live in the country, you might get it from the same plant or a well.

Multiple Choice Questions

City water is collected from rivers, lakes, and the ground. It is stored underground in aquifers.

Short Answer Questions

If you live in the country, you might have a well. To make a well, a long and deep tunnel is dug straight into the ground until it is deep enough to reach ground water.

The Journey of a Wave Reading Passage

When molecules of moving air (wind) hit molecules of water on the surface of the ocean, they push the water in the direction the wind was blowing.

Multiple Choice Questions

If there's a storm at sea with strong winds, the waves can get extremely big. The strong winds can move more water, so the waves start out being big and get bigger and bigger as they move toward shore.

Short Answer Questions

When a wave, big or small, hits the shore, it breaks apart and disappears. The constant movement of waves across the beach causes any rocks on the shore to be very smooth.

H - Two - Oh: What Is Water? - Reading Passage

Water is the building block of life and the second most important thing to humans like you and me.

Multiple Choice Questions

When the Earth was created, the extreme heat on the planet created most of the water that is on Earth today. If you think about it, your glass could be the same water that floated down the Nile River in ancient Egypt!

Short Answer Questions

The most spread our form of water molecules is gas. Ever put your face up to a window and blown hot air on it?

Why Does Ice Float? - Passage

It seems strange that ice, a solid form of water, would float on the top of the liquid of the same compound. Ice floats due to its density and molecular structure.

Multiple Choice Questions

Every molecule in the world has a density. Density describes how many molecules are squished into the same amount of space.

Short Answer Questions

What about icebergs? They're much larger than ice cubes - how do they float in the ocean?