Unit 4 Lesson 1: Solids, Liquids and Gas

Unit 4Unit 4

The Three States of The Three States of WaterWater

VocabularyVocabulary

Solid: having a definite volume and Solid: having a definite volume and shape. A substance or an object that shape. A substance or an object that is solid, not liquid or gas.is solid, not liquid or gas.


ICE: water that has frozen and ICE: water that has frozen and become solid. become solid.


Liquid: Having a definite volume but Liquid: Having a definite volume but no definite shape. A substance that no definite shape. A substance that flows freely and is not a solid or a flows freely and is not a solid or a gas. gas.


Water: A liquid without color, smell or Water: A liquid without color, smell or taste that falls as rain, is in rivers taste that falls as rain, is in rivers and seas, and is used for drinking.and seas, and is used for drinking.


Gas: having no definite volume and Gas: having no definite volume and shape. Any substance like air that is shape. Any substance like air that is neither solid nor liquid. neither solid nor liquid.

http://www.youtube.com/watch?v=btGu9FWSPtc




Water vapor: The gaseous state of Water vapor: The gaseous state of water. Formed when water water. Formed when water evaporates. evaporates.


Steam: The hot gas that water Steam: The hot gas that water changes into when it boils. changes into when it boils.


Definite: sure or certain; unlikely to Definite: sure or certain; unlikely to change.change.

Volume: the amount of space that an Volume: the amount of space that an object or substance fills. object or substance fills.


Boil: to change from a liquid to a gas Boil: to change from a liquid to a gas by the application of heat; to reach by the application of heat; to reach the boiling point. the boiling point.


Condense: to change from a gas to a Condense: to change from a gas to a liquid; to make a gas change into a liquid; to make a gas change into a liquidliquid


Infiltrate: to pass slowly into Infiltrate: to pass slowly into something. When rain soaks into the something. When rain soaks into the ground it is called infiltration. ground it is called infiltration.


Precipitation: any form of water, such Precipitation: any form of water, such as rain, snow, hail or sleet that falls as rain, snow, hail or sleet that falls to the earths surface. to the earths surface.


Runoff: rain or water that runs off Runoff: rain or water that runs off land into streams and rivers. land into streams and rivers.


Transpire: When plants or leaves Transpire: When plants or leaves transpire, water passes out from transpire, water passes out from their surface. their surface.

Water can exist in three states: Water can exist in three states: solid, liquid and gas. solid, liquid and gas.

SolidSolid

Solids can be picked up and handled. Solids can be picked up and handled. They keep their shape unless you They keep their shape unless you cut, slice or break bits off to make cut, slice or break bits off to make new and different shapes.new and different shapes.

A solid has a definite shape and has A solid has a definite shape and has a definite volume. a definite volume.

Solid water is called Solid water is called ice.ice.

Ice has many uses in the real world.Ice has many uses in the real world.

Ice can be used for sport or Ice can be used for sport or recreation. Many people use ice to recreation. Many people use ice to play ice hockey or to practice figure play ice hockey or to practice figure skating. skating.

Ice can be used to keep food fresh.Ice can be used to keep food fresh.

If food is kept at a low temperature it If food is kept at a low temperature it will stay fresh longer.will stay fresh longer.

Ice can be eaten.Ice can be eaten.

Shaved ice mixed with fruit is a very Shaved ice mixed with fruit is a very popular desert.popular desert.

LiquidLiquid

Liquids are hard to control. You need Liquids are hard to control. You need to keep them in a container or they to keep them in a container or they will glow downward under the force will glow downward under the force of gravity. of gravity.

A liquid will change its shape to A liquid will change its shape to match the shape of the container you match the shape of the container you put it in.put it in.

A liquid has no definite shape but it has A liquid has no definite shape but it has a definite volume. a definite volume.

Liquid water is called waterLiquid water is called water

Water can be used for sport or Water can be used for sport or recreation.recreation.

Many people like to have fun at a Many people like to have fun at a swimming pool. swimming pool.

Water polo is a sport played in a Water polo is a sport played in a swimming pool. swimming pool.

We must drink water to stay alive. We must drink water to stay alive.

A lot of water is used to grow the food A lot of water is used to grow the food we eat.we eat.

http://www.youtube.com/watch?v=bNOpNBw1Kps

When water is supplied artificially to When water is supplied artificially to land for growing plants it is called land for growing plants it is called irrigation. irrigation.



GasGas

Most gases are invisible. The air Most gases are invisible. The air around us is made of a mixture of around us is made of a mixture of gases. gases.

A gas that is kept in a container will A gas that is kept in a container will completely fill that container. completely fill that container.

Any gas that is not in a container Any gas that is not in a container keep sincreasing in volume, keep sincreasing in volume, spreading further and further. spreading further and further.

A gas has no definite shape and no A gas has no definite shape and no definite volume. definite volume.

Water as a gas us called Water as a gas us called water water vaporvapor or or steam.steam.

Making CloudsMaking Clouds

http://www.youtube.com/watch?v=jIa9TcmhKd0



We use steam for ironing clothes. We use steam for ironing clothes. Steam makes it easier to get rid of Steam makes it easier to get rid of creases.creases.

We can use steam for cooking. It We can use steam for cooking. It keeps more nutrients in the food. keeps more nutrients in the food.

Unit 4 Lesson 1: Solids, Liquids and Gas

Technology

Transcript of Unit 4 Lesson 1: Solids, Liquids and Gas