1) Look at these geometric figures and think about their qualities such as colour or shape.

Transcription

1 NAME: UNIT 13. MATTER 1.-Introduction. Brainstorm 1) Look at these geometric figures and think about their qualities such as colour or shape. 2) Can you measure these characteristics? Why? Yes, I think that you could.. No, I think that you could not.. 3) Look at these images and think about some properties such as mass or volume in solids, liquids and gases. Solids Liquids Gases 4) Could you measure these characteristics? Yes, I think that I could.. No, I think that I could not.. KEY WORDS Measure: To find the size, weight of something by using an instrument Shape: The form of something Mass: Amount of matter that an object contains. It is measured in grams and kilograms. IES Rafael Pérez Estrada.1ºBil 1

2 Volume: Amount of space that something occupies. It is measured in litres 2.-What is matter? Everything that surrounds us is made up of matter. The air, the water, the rocks, animals, plants, everything. We can define matter as all that has mass (can be weighed) and occupies a space (volume). Activity 1. Two students are arguing in class because one of them thinks that the air is not matter. Do you agree? Why? I agree with him, because I don t agree with him, because.. How could you show that the air is matter? You have an inflated balloon, an un-inflated balloon and a pair of scales. IES Rafael Pérez Estrada.1ºBil 2

3 Activity 2. Are the following elements matter? Explain your answers. Wine. Sound.. Vapour Wood.. Light. Sand. Taste 3.-Mass and volume Mass measures the amount of matter that a body possesses. The unit of mass in the International System of Unit (SI) is the Kilogram (kg). We use submultiples of the kg: gram (g), decigram (dg), centigram (cg) ands miligram (mg). Mass is measured with a scale. Volume is the space that a body occupies. The SI unit is the cubic metre (m 3 ). We also use the cubic decimetre (dm 3 ) and the cubic centimetre (cm 3 ). The volume of solid bodies, liquids and gases can be measured with a measuring cylinder. The capacity of a vessel is the maximum volume that it can contain. The unit of capacity in the SI is the litre (l). Submultiples are decilitre (dl), centilitre (cl) and mililitre (ml). Measuring cylinder Electronic scale IES Rafael Pérez Estrada.1ºBil 3

4 Activity 3. A measuring cylinder contains 30 ml of water. A metal ball is placed in the cylinder and the level of the water goes up to 40 ml. What is the volume of the ball? 4.- Density The density of a substance is the relationship between its mass and the volume it occupies. Density = Mass / Volume Activity 4.- Discuss with your partner and write down the answers to the following questions: a) Which weighs more, a Kg of white cork or a Kg of iron? Why? b) What has more volume, the Kg of cork or the Kg of iron? c) What has more density cork or iron? Activity 5.- If you mix water and oil in the same recipient, oil float on the water. Why? Activity 6.- Watch and listen to the video about IES Rafael Pérez Estrada.1ºBil 4

5 4.-Classification of matter Matter can be classified into mixtures and pure substances. On the one hand, mixtures can be classified into heterogeneous and homogeneous mixtures. On the other hand, pure substances can be classified into elements and compounds. MIXTURES are combinations of two or more substances which have different specific properties. Their chemical composition is variable. Homogeneous mixtures are mixtures which you cannot see the different components. Examples: a fruit juice, the air, water and salt. Heterogeneous mixtures are mixtures in which you can see the different components. Examples: a fruit salad, granite, water and oil. IES Rafael Pérez Estrada.1ºBil 5

6 Activity 7. Look at the components in these mixtures. Classified them into heterogeneous mixture and homogeneous mixture a) sand+water b) sugar+water c) alcohol+water d) iron +salt e) sugar+salt f) a vegetable salad g) sugar+milk h) oil + water HETEROGENEOUS MIXTURE Sand and water iron +salt sugar+salt a vegetable salad HOMOGENEOUS MIXTURE sugar+water alcohol+water sugar+milk Cola cao, blood, atmosphere oil + water Nature in the classroom - You are going to work in pairs and each person must speak about 3 IES Rafael Pérez Estrada.1ºBil 6

7 minutes. - You will prepare and present a visual and oral presentation in the class. - Your presentation should be about: The methods of separation of the components of mixtures - Your presentation must include: - A diagram with the procedures used to separate mixtures. - The definitions of each method of separation with an example. ASSESSMENT CHART UNIT 13. MATTER Circle one of these options: YES, NO AND NOT YET SELF- I CAN... Recognize scientific words Take notes from a listening or a video Find valuable information from different sources Describe images and pictures Translate the main ideas of a text scientific concepts with a partner I KNOW... What matter is and the properties that are proper of the matter. What mass and volume are. What density is IES Rafael Pérez Estrada.1ºBil 7

8 To differentiate between mixtures and pure substances. To differentiate between homogeneous matter and heterogeneous matter. Different technique to separate mixtures to obtain pure substances. Suggestions to improve my learning process IES Rafael Pérez Estrada.1ºBil 8