Review Sheet Exercise 8 Chemical and Physical Processes of Digestion NAME Dane Wilson LAB DATE/TIME august 4th Carbohydrate Digestion The following questions refer to Activity 1: Assessing Starch Digestion by Salivary Amylase. 1. At what pH did you see the highest activity of salivary amylase? Why? 7.0 because that is when the salivary is most effective and it breaks down carbohydrates. 2. How do you know that the amylase did not have any contaminating maltose
Premium Enzyme Digestion Starch
Shelby Brown 8/28/10 Physical and chemical changes lab essay Changes in matter occur every day. There are two types of ways matter can be altered; physically and chemically. Physical changes do not change the composition of the matter while chemical changes occur when one or more substances turn into a completely new substance. Physical changes can be seen through an altering of the substances physical property. A substances physical property is observed and measured without changing
Premium Chemical substance Chemistry Mixture
Physical and Chemical Properties Chem 107 6-4-2013 A pure substance or chemical substance is a material that is homogeneous. It has consistent properties throughout the sample.” Pure substances can be described by both physical and chemical properties”. Physical properties can include‚ color‚ odor‚ melting point‚ boiling point‚ and solubility in various solvents‚ etc. The observation of these physical properties does not involve any chemical change in the substance‚ it is still the same
Premium Chemical reaction Chemistry Color
04/15/14 Name: Lisa Jacoby Title: Physical and Chemical Properties Purpose: Investigating the chemical properties of pure chemical substances as well as exploring the physical properties of pure chemical substances Procedure: 1. I half-filled one well of a 24-well plate with 6M HCl and half-filled a second well of the 24-well plate with 6 M NaOH. I then sucked up these chemicals into their labeled pipets. I then set aside for later 2. I performed the following steps on each substance
Premium Chemistry Chemical reaction Chemical substance
Physical and Chemical Changes Say you are presented with two beakers‚ beaker A and beaker B‚ each containing a white‚ powdery compound. * a. From your initial observations‚ you suspect that the two beakers contain the same compound. Describe‚ in general terms‚ some experiments in a laboratory that you could do to help prove or disprove that the beakers contain the same compound. You may try some of the followings: * Dissolving in water * Dissolving in different chemical solution
Premium Chemistry Arithmetic Decimal
Alcohol Lamp Funnel Beaker Data: Naphthalene 1. white crystalline compound 2. has a strong odor 3. round shape 4. it weighs .23g (2 pcs.) Observation: 1. After grinding the two pieces of naphthalene balls‚ we put it in the evaporating dish with water and stirred it and placed it in the tripod and heat it. The funnel with filter paper served as the lid of the evaporating dish. 2. The filter paper filtered the fumes that coming out from the boiling water. 3. While
Premium Water Nitric acid Ammonia
Online OET Preparation Material Task 2 Physical Activity Part A Summary Gap Fill Time Limit: 15 minutes Instructions • • • • • Complete the following summary using the information in the texts for this task. Skim and scan the texts to find the information required. Gaps may require 1‚ 2 or 3 words. Write your answers in the appropriate space in the column on the right hand side. Make sure your spelling is correct. Summary Answers 1. Promoting Physical Activity In Australia and many other (1) ____countries
Premium Obesity Health World Health Organization
active seems to be of interest to many people in today’s world‚ the numerous reasons often go unannounced because of the stress that is put on physical image rather than overall health. Physical activity includes any action that strengthens muscles or strengthens the cardiovascular system. It can be performed by aerobic exercises such as sports and other activities that increase cardiovascular endurance or anaerobic exercise such as weight training that focus on increasing short term muscle strength.
Free Obesity Physical exercise Exercise physiology
More Physical Activity in the Workforce In 2008 the U.S. Department of Health and Human Services released the 2008 Physical Activity Guidelines for Americans‚ a comprehensive resource that provides guidance on the importance of being physically active. Relevant to policy makers‚ physical educators‚ health professionals‚ and the public‚ the Physical Activity Guidelines present information about the value of physical activity and the health benefits that can be gained through regular physical activity
Premium Obesity Physical exercise Exercise
The Benefits of Physical Activity Physical activity is defined as any bodily movement produced by skeletal muscles that requires energy expenditure. Physical inactivity has been identified as the fourth leading risk factor for global mortality causing an estimated 3.2 million deaths globally. Regular moderate intensity physical activity – such as walking‚ cycling‚ or participating in sports – has significant benefits for health Regular physical activity is one of the most important things you
Premium Obesity Cancer Hypertension