Earth Science Unit 1 lesson 1 Water and it's Properties

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What is a water molecule composed?

2 hydrogens and 1 oxygen- Which is the formula for H20

How much of the freshwater used by humans is used for in dustrial purposes such as two manufactured goods, cool power stations, clean industrial products, extract minerals and generate energy by using hydroelectric dam?

20%

What percentage of water on earth is fresh water?

3%

How much water do humans make up?

70%

What percent of water on earth is saltwater?

97%

Solvent

A liquid substance capable of dissolving other substances

When water changes state, what happens to the energy?

Absorbs or release

The property that holds molecules of different substances together is called what?

Adhesion

What property of water allows certain water to stick to a spider?

Adhesion

Matter is made of tiny particles called what?

Atoms-Which can join with other atoms to make molecules

What are examples of how water is used for human activities?

Bathing, cleaning, watering lawns and gardens, drinking and doing dishes

Why do water molecules stick together tightly?

Because of polarity

Gravity

Causes Liquid water to flow downhill and to rest and low lying areas and became lakes rivers and oceans

In a living organism what is water needed for?

Cellular chemistry, regulates temperature, transport substances

What characteristic of water accounts for its properties of adhesion, cohesion, high specific heat and nature as a solvent?

Chemical reaction

What is the property that holds molecules of a substance together called?

Cohesion

What property of water allows certain insects to walk on top of a pond?

Cohesion

What property of water allows it to form droplets when it is in liquid form?

Cohesion

What property of water allows one to fill a glass above the rim?

Cohesion

weather

Depends on the amount of moisture in the air

What are the properties of water in the solid-state?

Different shapes and different volume

Why is earths water vapor not found in low places?

Expands to fill available space

What are the properties of water in the gaseous state?

Fills the available space, expands to fill the space, doesn't have a different shape or volume

What are the properties of water in the liquid state?

Flows, definite volume shape of container

Why do humans need clean water?

Good health and in order to survive

What is water used for in agriculture?

Irrigating crops and care for farm animals

Why is water called the universal solvent?

It dissolves more substances than any other liquid

What happens when water freezes?

It expands and there are more open spaces between the water molecules. Therefore ice is less dense than liquid water so it ice floats on liquid water

What form of water makes up most of earth?

Liquid

In a water molecule, the oxygen atoms have a small what?

Negative charge

What is contaminated water sources harmful to?

Plants, animals and can affect crops that provide food for humans

In a water molecule, the hydrogen atoms have a small what?

Positive charge

How do ocean waves reshape a landscape?

Pounds the beaches

What are the forms of water that fall to earth?

Rain, hail, snow, sleet

How do glaciers and reshape a landscape?

Scrapes away rock and soil, depositing your sediment when it melts

What are the four properties of water?

Stick to itself, Absorbs a large amount of energy, Dissolves many things, And sticks to other substances

How do you rivers reshape the landscape?

They can wear away rock and carry away sediment and soil

When water drops roll off services made of non-polar molecules it is called what?

Unwettable or waterproof- ex. Rubber boots

wettable

Water molecules that can stick to the molecules of other polar substances Ex. Paper towel

The ability of water to the store and release heat is very important in what?

Weather and climate

Polarity

anything that has a positive charge at one end and a negative charge at the other end

Four roles of water on Earth

influencing weather, shaping earth's surface, supporting life, supporting human activites

What are the three states of water?

solid, liquid, gas

The energy needed to heat substance by a particular amount

specific heat

water vapor

water in the form of a gas. Or it can freeze into solid ice or snow


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