# Matter and Energy Chapter 2.

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Matter and Energy Chapter 2

Bell Work Write a paragraph describing the endangered specie you chose. Don’t just list the facts make sure you write a paragraph with sentences that go together. (introduction, body, and conclusion)

Bell Work What is an observation?
What are some things you need to make sure you do when making observations? What are some characteristics that you can observe?

Vocab 2.1 physical property p.41 density p. 43 physical change p. 44
Use your book to look up the following vocab words and make a 4-square chart for each. physical property p.41 density p. 43 physical change p. 44 chemical property p.46 chemical change p.46

Vocab 2.1 physical property – characteristics of a substance that can be observed without changing the identity of the substance density – measure of the amount of matter present in a given volume of a substance (d = m / v) physical change – a change in any physical property of a substance

Vocab 2.1 (cont) chemical property – a characteristic of a substance that describes how it can form a new substance. chemical change – a change of one substance into another substance

Bell Work 10/18/10 Please get a new bell work sheet from by the sinks. Please answer in complete sentences. What is an endangered specie? Why is it important to protect endangered species?

Assignment 10/18/10 Go to my webpage and click on 6th grade and then endangered species website. In the homework section of your notebook take notes on at least 3 different endangered species. Include the following information name of endangered specie, what type of habitat does the specie live in, what is the human value of the specie, the ecosystem value of the specie, and what type of food the specie eats.

Bellwork 10/20/10 Calculate the following Density – refer to pg. 43 if you don’t remember how to calculate density A piece of clay has a mass of 250 g and a volume of 10 cm3. What is the density of the clay? (please show your work) A block of gold has a mass of 15g and a volume of 3 cm3. What is the density of the gold? (please show your work)

Please put everything away and sit quietly.
Bell Work 10/21/10 Please put everything away and sit quietly.

Bell Work 10/22/10 List 3 examples of physical properties.
Give an example of a physical change. List 3 examples of chemical properties. Give an example of a chemical change.

Bell work 10/25/10 What effect does observing a substance’s physical properties have on the substance? What is the density of a block of wood with a mass of 750 g and a volume of 100 cm3?

Bell Work 10/26/10 1. Density is a chemical property.
Write the sentence then decide if the statements are true. If false, correct them. 1. Density is a chemical property. 2. Cutting a carrot in half is a physical change. 3. Silver tarnishing is an example of a physical change.

Bell Work 10/27/10 Describe your favorite station yesterday. Was it a chemical or physical change?

2.2 Vocab Melting – the process by which a solid becomes a liquid
Melting point – the lowest temperature at which a substance begins to melt Freezing – the process by which a liquid becomes a solid Freezing point – the temperature at which a specific liquid becomes a solid

2.2 Vocab Cont. evaporation – the process by which a liquid becomes a gas sublimation – when a solid changes directly to a gas (dry ice) boiling – a liquid becomes a gas and bubbling occurs Boiling point – the temperature a liquid must reach in order to boil Condensation – the process where gas changes its state to become a liquid

Bell Work 10/28/10 What is melting? What is freezing? Compare and contrast melting point and freezing point. (at least 2 sentences)

Bell Work 11/1/10 Please get a half sheet of paper from by the sinks. Write your answers for the questions on your bell work sheet. Please do not write on the half sheet of paper.

Bell Work 11/2/10 In your own words what is evaporation?
In your own words what is sublimation? In your own words what is boiling? In your own words what is condensation?

Bell Work 11/3/10 Decide whether each is a chemical or physical change. Water evaporates into steam A piece of orange rots on the ground A tire is inflated with air. Brownies are baked. Milk sours. Burning a candle. Glass breaking. Painting a fence brown.