Teachers' Corner PH

  Directions: Write the letter of the correct answer. 1.What kind of mixture is formed when oil is mixed with water?   a.            Solution                 b. water   c.       Colloids                 d. suspension 2.How does suspension appear?   a.      a.   It appears clear.          b. It appears cloudy.   c.It appears messy.   d. none of the above 3.Which of the following statements do not describe a suspension?   a.       Suspensions are larger particles is visible to the naked eyes.   b.      Suspensions are particles that settle out when left undisturbed.   c.       Mixture of soil and water is an example of suspension.   d.      Suspensions are homogeneous mixture and invisible to the naked eye. 4.What kind of mixture is formed when larger particles settle out when left undisturbed?   a.       Colloid                   b. suspension   c.         Solution                d. solvent 5.Which of the following mixtures is not an examp

         The small intestine is a coiled tube about 6 meters long. If you were to lay it straight, it would be four or five times the length of your body. It is connected to your stomach. It is lined with muscles that also have peristalsis movement.            The first part of the intestine is called the duodenum . From its walls flow liquid substances. Bile flows into the intestines from the liver and juice from pancreas. Bile helps digest fatty foods. Pancreatic juice helps digest starches, proteins and fats.                              The food becomes almost liquid in the intestine. Nutrients in the food are absorbed by the body through the blood vessels along the intestinal walls.             The walls of the small intestines are lined with villi. These look like tiny fingers. The villi separate the food nutrients ready to be absorbed by the walls from the food that is not ready yet. Through the villi, the food nutrients flow into the bloodstream which distributes them to the c

           What helps you swallow the food you eat?              The tongue is a strong muscle that helps the teeth. It mixes the saliva and the food. Then it turns the food so the teeth can break it up. When the food is finely cut up. the tongue then pushes it to the back of the mouth and into the throat.          

         When the food is swallowed, it slips down the throat and passes through the pharynx. There are two passages leading out from the pharynx; one is the esophagus which is the passage for the food and the other is the windpipe which is the passage for the air. The muscles of the pharynx move the food to the esophagus. This is a tube leading from the throat to the stomach. The esophagus is about 25 cm. long.              When you swallow, the opening to your windpipe closes. If you talk while you swallow, the food may get into the windpipe. This will cause you to choke and cough until the food particle gets out from your windpipe.               The muscles of the esophagus move the food toward the stomach. This squeezing movement of muscles is called peristalsis.               What is peristalsis movement like?               The movement of the toothpaste from its tube is similar to what happens to the food in your esophagus. The food is forced into the stomach by peristalsis. 

 Directions: Choose the letter of the correct answer. 1. Mixtures can be homogeneous or heterogeneous. A sachet of 3 in 1 coffee contains coffee, sugar and powdered cream. Thus, making it heterogeneous. When hot water is being poured into the 3 in 1 mixture, it turned homogeneous. What idea supports the said occurrence?     a. The components of mixtures when dissolve in hot water cannot be identified.     b. The components of mixtures mixed with hot water taste sweet.     c. The components of mixtures form a two-layer liquid.     d. The components of mixtures can be separated. 2. Which of the following are homogeneous mixtures?     I. Tea with sugar                 IV. Alcohol     II.   Buko salad                          V. Air     III. Nachos     a. I and II         b. IV and V           c. II and III             d. I, IV and V 3. Which is true about heterogeneous mixtures?     a. Composition of mixtures are the same all throughout.     b. Composition of mixtures are visible.     c.

  1.      C 2.      A 3.      C 4.      D 5.      C 6.      D 7.      A 8.      D 9.      D 10.   A 11.   D 12.   C 13.   A 14.   A 15.   A 16.   B 17.   B 18.   A 19.   B 20.   A

                     Where does digestion begin? What helps make digestion possible? How does digestion                happen?                      Digestion begins in the mouth where the food is chewed and cut into small pieces. The                teeth breakdown, chop, and grind the food so that it can be swallowed easily. Different teeth             perform different functions in breaking down food.                       The incisors cut the food. The cuspids tear it. The molars grind and crush the food.                     How do they do this? Look at the different shapes of the teeth. How are their shapes related            to their functions?                     PERMANENT TEETH                   1. Central Incisors                                                     2. Lateral Incisors                   3. Canines                   4. First Bicuspids                   5. Second Bicuspids                   6. First Molar                   7. Second Molars                   8. Thi

             The stomach is a hollow muscular bag at the end of the esophagus. It is just above the  waistline, on the left side. The part below the waistline is the abdomen, not the stomach. The  stomach can stretch if you eat a big meal.           The inner walls of the stomach are covered with glands that make gastric juice. The walls of  the  stomach tumble, shake, squeeze, and mix the food with the gastric juice. This makes the food  look like thick soup. Eacg day, about two liters of gastric juice is made in the stomach.

    I. Choose the letter of the correct answer. 1 . A form of energy possessed by a moving object or energy stored in the structure of the object due to its position. a. Mechanical Energy                     c. Chemical Energy b. radiant or Light Energy              d. Electrical Energy 2 . It is a form of energy that travels through empty space. a. Mechanical Energy                     c. Chemical Energy b. radiant or Light Energy               d. Electrical Energy 3 . A form of energy produced by moving electrons. a. Mechanical Energy                     c. Chemical Energy b. radiant or Light Energy              d. Electrical Energy 4 . It is produced when two different materials are rubbed together. a. electric current                            c. static electricity b. electrical energy                         d. nuclear energy 5 . It is the energy produced by vibrating objects. a. Sound Energy                               c. Thermal Energy b. Nucl