Remembering 1 List three types of models that are used in science. The Particle Model, Computer Models to simulate weather and models of newly shaped

Size: px

Start display at page:

Download "Remembering 1 List three types of models that are used in science. The Particle Model, Computer Models to simulate weather and models of newly shaped"

Lillian Phelps
5 years ago
Views:

1 Remembering 1 List three types of models that are used in science. The Particle Model, Computer Models to simulate weather and models of newly shaped wings. 2 List five different examples each of a solid, a liquid and a gas. Solid: Rock Ice Sand Plastic Tin Liquid: Water Soft Drink HCl (can be a liquid when confined) Liquid Butane Honey Gas: Steam HCl Butane Gas Methane Gas Carbon Dioxide 3 State what is meant by the term phase of matter? A phase of matter is when it is in a certain state such as a gas or a solid. Understanding 4 Describe the term matter in your own words. Matter is what makes up everything we know of in the universe. For example we are made up of it and butterflies are made up of it too. 5 Describe Brownian motion and how it was first discovered. Robert Brown first discovered the Brownian motion when he looked at grains of pollen suspended in water with a

2 microscope. The grains of pollen were vibrating and moving erratically because they kept bouncing off particles of water. 6 Some people could mistakenly classify sugar, soft plasticine and mud as liquids because they take the shape of their container. Clarify the definition of a solid so that people cannot make this mistake. A solid is a phase of matter in which the individual molecules are closely bonded to each other. For example although sugar can easily fill a container each grain of sugar has closely bonded molecules. 7 Describe what happens to the particles in a solid when it dissolves. The particles of the solvent closely surround the solute and pull them apart spreading them thinly throughout thee solvent. 8 Explain why diffusion is evidence for the particle model. Because it proves that all matter is made up of tiny particles that can be pulled apart. 9 When trying to prove a new scientific model, a scientist should repeat their experiments a number of times. Explain why. They should do it many times to prove that the first time wasn t a fluke. 10 Explain why the particle model predicts that gases can be compressed, but predicts that solids and liquids cannot. Because it shows that gases are not closely linked but solids and liquids are. 11 Foam rubber is a solid, yet it is easily compressed. Explain how this can be. Maybe the particles of foam rubber have a large amount of space between each other that allows it to be easily compressed. 12 Identify a food or drink that contains: a. Both solid and liquid material Cadbury Chocolate Caramello

3 b. Both a liquid and a gas Coffee c. Only solid Crackers d. Only liquid. Water 13 a. Identify how the fragrance of a perfume travels throughout a room. The molecules of the perfume spread out easily and move through the air while occasionally colliding with the air molecules. b. Use a diagram to illustrate how the perfume particles make their way across the room. 15 Compare the properties of solids, liquids and gases by completing the table below.

4 Evaluating 16. There must be some bonds or attractions, however weak, between the particles in a liquid. Justify this statement. If you drink water with a straw water follows water.

17. Propose a reason why a liquid (i.e. brake fluid) is used in brake lines to transfer pressure to a car s brakes from the foot pedal, whereas gas is used in shock absorbers.

5 17. Propose a reason why a liquid (i.e. brake fluid) is used in brake lines to transfer pressure to a car s brakes from the foot pedal, whereas gas is used in shock absorbers. Because a gas can be easily compressed while a liquid cannot. 18. Propose what might happen to the bonds (i.e. attractions) between particles when the material they belong to is heated and changes: a. From a solid to a liquid The bonds are weakened dramatically because of the heat. b. From a liquid to a gas. The bonds are basically destroyed as heat is applied. Creating 19. Construct your own version of the particle model. Draw it as three layers, with solid at the bottom, changing into liquid and, finally, gas at the top.

States of matter. 22 Science Alive for VELS Level 5

States of matter. 22 Science Alive for VELS Level 5 States of matter E verything around you is made of matter. Anything that has mass and takes up space is matter. The air we breathe, the water we drink and the food we eat are all different types of matter.