No particular arrangement. Place the balloon in the microwave oven and heat on full power until you see the balloon starting to expand. How does the particle model of matter help us understand the process of diffusion? Remember to give your diagram a heading and to provide labels. Complete the following sentence by writing it out in full again: During expansion, the spaces between the particles get _____, and during contraction, the spaces between the particles get _____. Are very strongly attracted to each other. [1 mark], Draw a picture to show the path of a perfume particle from a flower on one side of a room to your nose on the other. Copyright © 2020 Multiply Media, LLC. The particles in a liquid are closer together than the particles in a gas. The independent variable is the type of material. Gases do not have a fixed shape. A suggestion is to fill the cup with water, then pour this water into a container which has measurement (such as a beaker or measuring cylinder) and then record what the volume is. They also bump against the inside of the container. When we talk about a rate, we are measuring how something changes in relation to another factor, such as time. What do you predict: Which material has the highest density: sand, flour, water or air? Activity: Which has the highest density: a solid, a liquid or a gas? The following diagram represents a container (on the left) that contains a small amount of gas. Which container contains the smallest number of particles? But first, we will look at how the model describes each state of matter. The higher the temperature of the liquid, the faster it will evaporate. Mass is measured in kilograms (kg). The process of turning a liquid into a gas is called _____. Liquid particles are not "arranged" so to speak. Why do you think it is dangerous to light a match or use a cell phone anywhere near a petrol station? Learners may say that the bubbles are full of gas. If you are working in groups, you need to first discuss how you are going to conduct (carry out) this investigation. We are going to discuss them first, then we will introduce density. Most smells travel fast, because their particles mix with air and get into our noses when we breathe. The following diagram shows us that to change the state of a substance, it must either be heated or cooled. Let's look at a thermometer to understand expansion and contraction. To observe and record the changes of state when candle wax is heated and when it is cooled. Gases have much lower densities compared to solids and liquids. What is plot of the story Sinigang by Marby Villaceran? This is why gases diffuse more quickly. Oil does not dissolve in water. The glass on the right is empty. The gas has the lowest density because it has the smallest mass in the same volume. Then get the learners in the middle to simulate the particles in a gas by spreading much further apart and moving around a lot more. You could also light a 'smoke bomb' (available from toy shops) outside the classroom if this is permitted at your school. The solid state of water (ice) is less dense than the liquid, because in ice the water molecules are packed in a unique way. Replace the brass frames with steel. When we heat a liquid, we are giving the particles more energy and speeding them up. Does a material have less mass when it has contracted? Once the ice has melted, you can then leave the dish out in a hot place so that the next state change can take place and the water evaporates. He uses this tank to breathe underwater. Move by vibrating. Why did you choose this one? [2 marks], Next time you are at the petrol station, look around for a warning sign that shows you should not light a match or use a cell phone. The speed at which particles diffuse depends on several factors, namely: Particles diffuse because they are in constant motion. The movement of the air is caused by differences in pressure between one area of the Earth's atmosphere and another. (They move more slowly.) What other solutions can you suggest? Revealed: Why COVID-19 kills some patients but not others, Disney CEO 'extremely disappointed' in Calif. leaders, 7-foot-1 prospect puts basketball world on notice, Strategist warns of big Dow drop in event of lockdown, Yang dismayed by Asian American reaction to Trump, 'Nothing abnormal' about huge gator, experts say, Tom Brady loses jet skis in Tropical Storm Eta, CDC outlines which masks are most effective, Senator's 'tone deaf' tweet on Lakers, Dodgers slammed, A close look at Trump campaign election lawsuits, 'Crazy train': GOP lawmaker rips Trump's fraud claims. Before you begin, put on your safety goggles. The particles in a gas have very large spaces between them, so the particles can be 'squashed' closer together, meaning the gas can easily be compressed to take up a smaller volume. Particles in a liquid vibrate, move about, and slide past each other. Continue to pump until it becomes too difficult to pump any more air into the tyre. What is the density of the butter? The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. That means the mass will always remain constant. How could we increase or reduce the amount of gas in a container? The spaces between particles get smaller when a material contracts. When you blow into a balloon that is fully inflated, why does the balloon pop? If you have access to a Gr. Imagine you are holding hands with a group of other learners. large glass vase or one litre glass measuring cylinder, water (can be coloured with food colouring, blue for example), rubbing alcohol (can be coloured with food colouring, red for example). Next pour in the next heaviest until you have poured all the liquids into the container.

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