Assignment: Properties

i will send  the images separately 

Record your answers in the template provided and submit them to the Assignment: Properties link for grading. For more information on how this will be graded, please view the grading rubric.

Section Warm-Up

Journal: Seltzer in Water

[img alt=”A seltzer tablet in water.” src=”http://static.k12.com/eli/bb/334/2_23579/1_124930_4_23583/634a35ff424938d285f15dd8d832abf31af3e831/media/33db7dd8daaa6dc72d1d5e4ca5bce6198a5e020e/mediaasset_630661_1.jpg” title=”A seltzer tablet in water.”>

In your house, grab a small cup of water, some seltzer tablets, and a thermometer. Over-the-counter heartburn or cold remedies will work for the seltzer tablets—just look for the ingredients, sodium bicarbonate and citric acid.

Write down your observations and answers to these questions in your journal and submit to the Journal: Seltzer in Water assignment link for grading. For more information on how this assignment will be graded, please view thejournal rubric.

Lab Introduction

Paper is an amazing material. Most paper is made from the cellulose fiber obtained from trees or other woody plants. Unlike wood, you can fold paper, tear it, or dissolve it in water. Each of these changes made to the paper is classified as a physical change.Paper, like the wood it is made from, can also burn in the presence of oxygen and enough heat– this is considered a chemical change. In this laboratory experiment, you will observe the physical and chemical changes that a substance can undergo

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Lab Instructions

Time Requirements: approximately one hour

Procedures:

Follow the lab instructions to perform the laboratory investigations. As you perform your experiment, record everything in this lab instruction sheet.

Use the checklist to make sure all parts of the lab are complete.

Lab Objectives

After you have completed this laboratory, you will be able to:

Lab: Chemical and Physical Changes

Congratulations on completing this lab! In this lab, you learned about:

Now it is time to turn in your lab instruction sheet. Make sure you have filled in all the relevant information and answered all the post-lab questions. Submit your lab report to the Lab: Chemical and Physical Changes assignment link for grading. For more information on how this assignment will be graded, view the Lab Rubric.

Exploratory Activity: Chromatography

Materials:Forensic scientists use chromatography on ink pens to tell if a document was written with a specific pen. This can provide direct evidence in many types of cases. For example, if a ransom note was found, forensic scientists would analyze the ink using chromatography.If a suspect was found with a pen that showed the same chromatography pattern, the forensic scientists would have strong evidence to suggest that suspect wrote the ransom note. Let’s see how forensic scientists would test a pen. You will need only a few simple household materials.

Procedure:

Answer these questions in the exploratory activity worksheet and submit your worksheet to the Exploratory Activity:Chromatography assignment link for grading. For more information on how this assignment will be graded, please view the rubric.

Lab Introduction

You’ve just poured yourself the last bowlful of your favorite breakfast cereal – Up & Atom. While working your way through the first few spoonfuls, you discover, from the information on the box, that each bowl contains your complete daily allowance of iron. Is there some way you can prove the cereal manufacturers statement? You’ve already added milk to the cereal. How would you separate out this mixture to measure the iron content? This lab will walk you through some of the processes for separating mixtures.

Lab Objectives

After you have completed this laboratory, you will be able to:

Lab Instructions

Time Requirements: approximately 1.5 hour

Procedures:

Follow the lab instructions to perform the laboratory investigations. As you perform your experiment, record everything in this lab instruction sheet.

Use the checklist to make sure all parts of the lab are complete.

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