Thursday and Friday
Recap questions to answer in 8 minutes 1] How have human teeth evolved (changed) over time? 2] Why do you think human teeth have evolved over time? 3] Who is the Cheddar man? What did scientists discover about his teeth? 4] Name two ways people cleaned their teeth before toothpaste was discovered? Email this work to the address below. Year4@kgreen.brent.sch.uk
In the previous lesson , you learnt about the history of teeth and how they have changed over time. Today you will learn about the important role of teeth in digesting food. Key vocabulary: saliva acid digest enzymes
Mouth • This is where the digestive system starts as it is from this point that food is entered in your mouth. Chewing is the first stage of the digestive system. • The different sets of teeth break, rip, tear and grind food using enzymes in the saliva to help so that it can enter the esophagus. • Teeth chomp your food , breaking it into smaller bits. Meanwhile, the tongue keeps moving the food around, shifting it to the type of teeth that will be best at munching it. It also squeezes the chewed food into swallowable lumps, pushing them back towards the throat.
How do your teeth help your digestive system? The hard surfaces of your teeth and the enamel that covers it, as well as the different shape that each type of the teeth, make the grinding process more efficient and effective. Each type of teeth performs specific roles that make the process of digestion easier. Incisors The teeth in front of your mouth or the incisors are perfect for cutting food and each set of front teeth have canines on both corners, also designed to tear and cut foods and push these foods inside your mouth for better grinding. Premolars The premolars also help in the chewing process and crush the food. Molars The molars’ size helps a lot in grinding and chewing the food into smaller pieces and allows you to swallow the food easily.
Task -complete the questions, using full sentences and a detailed explanation. Once you have completed your questions, take a picture of it or scan your work and email it to the address below so that we can see your fantastic work. Year4@kgreen.brent.sch.uk
Task- write a short narrative from the apple’s perspective (point of view), using first person (I, my). Imagine you are the apple being eaten. Describe your journey , starting from when you enter the mouth all the way until you have been swallowed . How do you feel? What is happening to you? Describe the actions of the teeth. How have you changed from when you first entered the mouth? Key vocabulary: Sentence starters to help you: saliva moist When I felt the cold, coarse human hands on my smooth, enzymes delicate skin, I knew what was to follow… canines Once you have completed incisors your questions, take a picture Razor-sharp, hard teeth punctured my skin, my juices sprayed of it or scan your work and molars in every direction… email it to the address below grinding so that we can see your chewing Upon entering the mouth, I was surrounded by darkness and fantastic work. swallow what seemed like an ocean of warm, sticky saliva… Year4@kgreen.brent.sch.uk razor-sharp
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