From 66fabbb5413a1b4b9755d5608d487f00361f1e36 Mon Sep 17 00:00:00 2001 From: Soup <39444003+magicalsoup@users.noreply.github.com> Date: Wed, 27 Mar 2019 20:32:13 -0400 Subject: [PATCH] Create TextBook_Questions.md --- Grade 9/Science/SNC1DZ/TextBook_Questions.md | 217 +++++++++++++++++++ 1 file changed, 217 insertions(+) create mode 100644 Grade 9/Science/SNC1DZ/TextBook_Questions.md diff --git a/Grade 9/Science/SNC1DZ/TextBook_Questions.md b/Grade 9/Science/SNC1DZ/TextBook_Questions.md new file mode 100644 index 0000000..a260fdd --- /dev/null +++ b/Grade 9/Science/SNC1DZ/TextBook_Questions.md @@ -0,0 +1,217 @@ + +# Unit 2 + +## Questions to Ask Ms.Keras +1. How do you tell the difference between mechanical mixtures and a mixture/solutions? + +## Page 178, Questions 3 - 10. + +Alloys: When two or more types of metals are mixed together. + +Solder Materials: Used to join together metal components, such as wires in electrical circuits and copper pipes in building, like glue. + +2. **Use the particle theory to explain why water changes from a solid to a liquid when it is heated.** + + As water is heated, the particles or atoms gain energy, thus begin to spread apart and moving quicker, and when particles are spread decently apart, that state is called a liquid state. + + +3. **Give 3 examples of a pure substance** + 1. Water + 2. Milk + 3. Apple juice + +4. **Give three examples of a mixture** + + 1. Soup + 2. Cereal with milk + 3. Granorla Bar + +5. **Describe a Mechincal Mixture** + + A mechinal mixture could be something like a cereal with milk, where you can see the cereal and milk easily. + +6. **Describe a Solution** + + A solution could be something like apple juice, where there are different types of particles present, but are evenly mixed. + +7. **Use a Venn diagram to compare mechanical mixtures and solutions** + + |Mechnical Mixtures|Both|Solutions| + |:-----------------|:--:|--------:| + |Apple Juice| + +8. **Identify each of the following as a mechanical mixture or a solution** + a. a pane of clear glass. **Solution** + b. chocolate chip ice cream. **Mechanical Mixture** + c. clear apple juice. **Solution** + d. a pizza. **Mechanical Mixture** + e. garbage in a garbage can. **Mechanical Mixture** + +9. **What kind of alloy makes an effective solder material?** + Tin and lead make an effective solder material, as it is fluid at high temperatures but solidifies quickly. + +10. **Lead is not often used in solder anymore. Explain why not.** + + As lead is a heavy metal, it causes radioactive damage to humans, such as brain damage, which makes it harmful and unsafe. + +## Pages 182 Questions 1 - 5 + +1. Are qualitative properties and physical properties basically the same thing? + +1. **Explain the difference between a qualitative property and a quantitative property** + + A qualitative property is a property that is of the **qualities** of an thing, for example, metal, which is very shiny and hard. A qualitative property + cannot be measured. + + A quantitative property is something that can be measured, like the temperature of the metal, the mass or size of the metal. + +2. **A student recoreded the following observations about a T-shirt. Classify each observation as a qualitative property or a quantitative property, and give reasons for your answers** + + a. It is red and grey in colour. **Qualitative**, as it cannot be measured and is a quality of the object. + + b. It is 60 cm long. **Quantitative**, as it its measured in cm and is the length of the object. + + c. It is soft and strectchable. **Qualitative**, it is a property of the material. + + d. It will shrink in 70o water. **Qualitative**, it is a property of the material. **Ask MS KERAS** + +3. **What physical properties are important for the materials used to make mountain bikes?** + + The bikes should be light weight, hard, durable and comfortable. + + +4. **List four physical properties of each of the following** + + * a piece of copper wire + 1. its shiny + 2. hard + 3. bendable + 4. smooth + + * 500 g of butter + 1. soft + 2. easy to cut through + 3. really creamy + 4. smells like cheese and milk + + * a glass of milk + 1. opaque + 2. white + 3. liquid + 4. non-viscous + + * a candle + 1. hot + 2. bright + 3. waxy + 4. soft + + * a piece of aluminum foil + 1. shiny + 2. smooth + 3. grey + 4. solid + + * a spoonful of sugar + 1. powdery + 2. white + 3. sweet + 4. solid + + * toothpaste + 1. somewhat viscous + 2. opaque + 3. taste like the flavour of the toothpaste + 4. squishy + +5. **In each of the situations below, it seems that a new substance may have been produced. Explain why each situation represents a physical change.** + + * A tailor makes a new suit out of a piece of fabric + - it is still a piece of the same fabric, thus no new substances have been produced, this is a physical change. + + * A chef makes a salad out of lettuce, tomatoes , and cucumbers + - This is a mixture of different substances, but no new substances have been created, this is a physical change. + + * A mechanic builds a boat engine out of a lawnmower + - The mechanic's lawnmower are still made of the same parts of the boat engine, thus no new substance was created. + + * A chemist boils slat water until only salt crystals are left. + - The water evaporated but the salt was already present in the water, thus its a pyhsical change. + + * A child makes juice by adding water to juice concentrate + - Juice already contains water, and adding more water just water downs the solution, but does not create a new substance. + + +## Pages 186 Questions 1 - 7 + +1. **Describe the diference between a physical change and a chemical change** + In a physical change, no new substance is created, while a new substance is created in a chemical change. + +2. **Explain why water freezing is not a chemical change.** + As freezing water is just changing the state of water, water is still water, so there has been no new substance created. + +3. **Classify each of the following as a physical or a chemical property** + - metalic lustre **CHEMICAL** + - boiling point **PHYSICAL** + - explodes when ignited **CHEMICAL** + - changes colour when mixed with water **CHEMICAL** + +4. **Classify each of the following as a physical change or a chemical change. For each chemical change, explain how you can tell that a new substance has been formed** + + - Water boils and turns into steam + - Physical change, there is not new substance + - Wood is sawed and made into a toy box + - Pyhsical change, the toy box is still made up of the same wood + - Firewood burns and ashes remain + - Chemical change, the ashes are the new substance + - Orange drink crystals are stirred into a pitcher of water + - Physical change, there is no new substance being created. + - Sugar eggs, and flour are mixed and baked into cookies + - Chemical change, the cake is the result of the ingredients reacting with bacterias and each other + +5. **What evidence is there that a glowstick works as a result of a chemical change?** + The glowstick glows due to the two chemicals at both ends meeting each other, which a new lumious liquid is made. + +6. **When a candle is lit and allowed to burn for 15 minutes, some wax drips and colelcts at the base of the candle, and the candle becomes shorter** + - Did you observe any physical changes? Explain + - yes, as the candle got shorter due to the flame buring it off. + - Why did the candle become shorter? What happened to the missing section of the candle + - the missing section of the candle turned into liquid due to the heat melting it. + - Did you observe any evidence of chemical change? + - **ASK MS KERAS** +7. **Think about each of the following situations and describe one chemical change that is occurring. provide evidence of the chemical change** + - A driver starts the car in the drive way + - The gasoline is being burned of to created electricity, and produces fumes that exit the car. + - A bathroom cleaning product removes a stain in the sink + - The chemicals in the product reacts with the stain, and the result is the removal of the stain. + - Bubbles form when baking soda is mixed with lemon juice + - The bubbles are the result of the chemical change + - Cookies baking in the oven give off a delicious aroma + - The ingredients are reacting with the heat to create the smell. + - A match is struck and ignites + - The friction of 2 substances sets off a chemical reaction that allows the match to light on fire + - Bleach turns a red towel white + - The bleach chemicals react with the pigments in the towel, resulting in the removal of the colour of the towel. + - A banana tastes sweeter as it ripens + - The chemicals in the banada react to heat and age, producing glucose, which makes it sweeter. + + ## Pages 215 Questions 1-10 + + Metalliod: an element that has properties of both metals and non metals + + Non metal: an element, usually a gas or a dull powdery solid, that does not conduct heat or electricity. + + Element: a pure substance that cannot be broken down into a simpler chemical substance by any physical or chemicl means + + Compound: a pure substance composed of two or more different elements that are chemically joined + + + + + + + + + + +