Science Test | Matter

1. Which of the following best defines matter?
   1. [ ] Anything that can be seen
   2. [X] Anything that has mass and takes up space
   3. [ ] Anything that changes state
   4. [ ] Anything that is solid
2. Which WHMIS symbol would indicate a substance that can easily catch fire?
   • [ ] Corrosive
   • [ ] Biohazard
   • [X] Flammable
   • [ ] Toxic
3. Which state of matter has a fixed volume but no fixed shape?
   • [ ] Solid
   • [X] Liquid
   • [ ] Gas
   • [ ] Plasma
4. Which property is quantitative?
   • [ ] Colour
   • [ ] Odour
   • [X] Mass
   • [ ] Texture
5. Which group of elements is found in Group 18 on the periodic table?
   • [ ] Halogens
   • [ ] Alkali metals
   • [ ] Alkaline earth metals
   • [X] Noble gases

1. Define a physical property and give one example. A physical property is a property that describes a substance. An example of this would be colour or density at room temperature.
2. Define a chemical property and give one example. A chemical property describes how a substance reacts with other substances. An example would be flammability/corrosiveness.
3. State the five postulates of the Particle Theory of Matter.
   1. All matter is made of particles
   2. Particles have space between them
   3. Particles are in constant motion
   4. Particles are attracted to eachother
   5. As temperature increases, particles move faster
4. What is the difference between an element and a compound? An element is a type of particle with only one type of atom. A compound has multiple atoms bonded together.
5. What does atomic number tell you about an atom? The atomic number tells us the amount of protons in an atom.g

1. Explain how temperature affects the density of most substances using the Particle Theory of Matter. Temperature increases how fast the particles move and makes them go further apart. Because they are less packed together, they are less dense.
2. Water is less dense as a solid than as a liquid. Explain why this is unusual compared to most substances. Water has a unique molecular structure. It forms crystal lattice. Other substances are usually denser as solids.
3. A student claims that breaking a piece of chalk in half is a chemical change. Do you agree or disagree? Explain your reasoning. No. There are no new substances. It is the same piece of chalk.
4. Explain why metals are good conductors of electricity using their physical properties. Because all metals are conductive. This is how the periodic table works. We were not taught why.

1. Identify whether each change is physical or chemical. Justify your answer. a) Ice melting in a glass : Physical. Same substance. b) Rust forming on iron : Chemical. Rust is new, change in colour. c) Cutting a piece of paper : Physical. Same paper d) Baking a cake Chemical: Change in colour, odor, and new substance

1. A metal block has a mass of 54 g and a volume of 6 cm³. a) Identify the givens : Mass=54g, Volume=6cm³ b) Calculate the density 9g/cm³ c) Include correct units and significant figures . The correct unit for density here is g/cm³. There is one significant figure in the answer with the least sig figs, so the answer will have one sig fig.
2. A liquid has a density of 2.5 g/mL and a volume of 40 mL. a) Calculate the mass b) Show your formula and work

1. A cleaning product has an HHPS symbol showing a skull and crossbones. a) What type of hazard does this symbol represent? This represents toxicity. It means it is highly poisonous b) Name two safety precautions you should take when using this product.
   • Wear gloves
   • Avoid eating
2. A student mixes sand and salt together. a) Is this a mechanical mixture or a solution? This is a mechanical mixture. b) Explain how you know. They are not evenly distributed. You can still differentiate
3. An element is shiny, malleable, and a good conductor. a) Is this element a metal, nonmetal, or metalloid? This is a metal b) Where would you expect to find it on the periodic table? You would expect to find it on the left side of the periodic table. Left of the staircase.

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