unit 1 - three states of matter

CIENCIAS NATURALES 1ºESO UNIDAD 1IES DELGADO HERNANDEZ DEPARTAMENTO DE FÍSICA Y QUÍMICA

UNIT 1The states of matter and the changes of state

OBJETIVOS (Teaching aims)

Objetivos de Ciencias Naturales

- Aprender cuales son los tres estados de la materia y sus principales propiedades.- Aprender cómo la materia cambia de un estado a otro.

Objetivos de Inglés - Conocer el vocabulario científico de la unidad.- Aprender el vocabulario científico básico de la unidad.- Comprender textos sencillos donde se usa el presente simple.- Ser capaz de describir las propiedades de sólidos, liquídos y gases.- Ser capaz de explicar qué ocurre cuando calentamos o enfriamos un cuerpo.

TAREAS (Tasks)

Task 1: Let's know the unit vocabulary

Activities

1.- Here is the vocabulary we are going to use in this unit. You have to look up the meaning of each word and write it down in this table. The words in bold are the basic unit vocabulary.

WORD MEANINGADDAMOUNTBOILBOILING POINTCERTAINCOMPRESSCONDENSECONTAINERCOOLDEPENDING ONEVAPORATEFLOWFREEZEFREEZING POINTGASHAPPENHEATICELIQUIDMATERIALMATTERMELTMELTING POINT

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OFTENREACHREMOVESHAPESOLIDSTATESTEAMTEMPERATUREVAPOURVOLUME

2.- Solve the word search and the crossword using the basic unit vocabulary

Task 2: The three states of matter

There are three states of matter: solids, liquids and gases. The state of matter can change when the temperature changes.

Gases have the following properties:

• Gases are often invisible.• Gases don't have shape. • If we heat a liquid it changes to gas.• If we cool a gas it changes to liquid.

Liquids have the following properties:

• Liquids can flow easily.• Liquids change their shape depending on the container.• Their volume is always the same.• If we heat a liquid it changes to gas.• If we cool a liquid it changes to solid.• If we heat a solid it changes to liquid.• If we cool a gas it changes to liquid

Solids have the following properties:

• Solids don't flow like liquids.• Their volume is always the same.• If we heat a solid it changes to liquid.• If we cool a liquid it changes to solid.

Activities

1.- Watch the video and answer the questions.

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2.- We are in the laboratory and the temperature is 20 ºC. Classify the following materials in solids, liquids and gases:

Coffee Paper sheetBread MilkOxigen SoapChalk Stapler

Perfume Orange juiceChewing gum Milk shake

3.- Here you are a list of properties about solids, liquids and gases. You have to find out the state that each property belongs to:

PROPERTY STATEThey are often invisibleThey don't have shapeThey can flow easilyIt changes to gas if we heat itTheir volume is always the sameIt changes to a liquid if we cool itThey change their shape depending on the containerIt changes to solid if cool itThey don't flow like liquids

Task 3: Changes of state

All matter can change from one state to another. We only have to add or to remove energy to change of state:

Changes of state happen when we reach certain points:

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We have in this graphic all the changes of state with their names:

SOURCE: www.chem4kids.com

Activities

1.- Complete the following diagram

SOLID LÍQUID

GAS

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http://www.chem4kids.com/


2.- Read this text and fill in the blanks using the list of words that you have below:

• Solids, liquids and gases are the three states of __________. • Materials can change from one state if we __________ or _________

energy.• If we heat a __________ , it changes to liquid. We call this change

__________.• If we heat a liquid, it changes to __________. We call this change __________.• If we cool a gas , it changes to __________. We call this change __________.• If we cool a liquid , it __________ to solid. We call this change __________.

LIST OF WORDS : melting , solid, changes , matter, solidification , remove, evaporation, gas, condensation ,add , liquid .

Source : www.bbc.co.uk/schools

Final task : Let's make a report!

Here is a table where you can find some substances with their boiling and freezing points. You have to choose one substance and make a report about it (the lab temperature is 20ºC).

SUBSTANCE FREEZING POINT º(C) BOILING POINT (ºC)

Iron (Hierro) 1539 2750

Copper (Cobre) 1083 2600

Aluminium (Aluminio) 660 2400

Lead (Plomo) 328 1750

Alcohol -114 78.3

Oil (Aceite) -5 400

Cobalt (Cobalto) 1495 2870

Clorhine (Cloro) -101 -135

Here is an example of the report:

Substance WATER

State LIQUID

Main Properties - Water can flow easily.- Water change its shape depending on the container.- Water volume is always the same.

The boiling point of WATER is

100ºC

The freezing point of WATER is

0 ºC

If we heat WATER up to 100ºC changes to vapour

If we cool WATER down to 0ºC changes to solid (ice)

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http://www.bbc.co.uk/schools


AUTOEVALUACIÓN (Self-assessment)

1.- What is the basic unit vocabulary? Make a list.

2.- What are the three states of the matter? Say one or two main properties of them.

3.- Complete the following sentences:

a) If we heat a solid it....................................b) ..................................it changes to gasc) ..........cool a liquid....................................d) ...................................................to liquid.

Después de contestar a las preguntas, valora cada una de ellas como BIEN, REGULAR, MAL, según tu creas que las has contestado. A continuación, fíjate en la siguiente tabla:

Pregunta 1 BIEN Sabes todo el vocabulario básico de la unidad

REGULAR Sabes parte del vocabulario básico de la unidad pero debes repasarlo.

MAL No conoces el vocabulario básico de la unidad. DEBERÍAS ESTUDIARLO DE NUEVO.

Pregunta 2 BIEN Sabes expresar en inglés cuáles son los tres estados de la materia y conoces alguna de sus principales propiedades.

REGULAR Sabes expresar en inglés cuáles son los tres estados de la materia y conoces alguna de sus principales porpiedades, pero debes repasarlo.

MAL No sabes expresar en inglés cuáles son los tres estados de la materia y no conoces sus principales propiedades. DEBERÍAS ESTUDIARLO DE NUEVO.

Pregunta 3 BIEN Sabes expresar en inglés qué ocurre si calentamos o enfriamos un cuerpo.

REGULAR Sabes expresar en inglés qué ocurre si calentamos o enfriamos un cuerpo, pero debes repasarlo.

MAL No sabes expresar en inglés qué ocurre si calentamos o enfriamos un cuerpo. DEBERÍAS ESTUDIARLO DE NUEVO.

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unit 1 - three states of matter

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