| Term | Definition |
|---|
| What do you observe at the bottom of the test tube? | Nothing really happened at the bottom; at the top of the tube there was condensation. |
| In the heating baking soda lab, does a gas collect in the inverted bottle? | Yes, water was pushed out. |
| In the heating baking soda lab, where did the gas come from? | From the baking soda. |
| Where did the droplets come from? | Humid air that was trapped in the test tube contained water vapor. When the water vapor heated it moved toward the top, where it was cooler, and condensed, becoming water droplets. |
| In the heating baking soda lab, is the color of the liquid in the two test tubes the same? | No, the color of the liquid in the heated tube is darker. |
| If the color in the two test tubes is not the same, is the powder in the heated test tube still baking soda? | No, because since the colors were not the same, and the non-heated test tube was the control group, it is definitive that what happened to the powder made it no longer baking soda. |
| In the heating baking soda lab, is the amount of condensation more or less than the amount of baking soda? | It can either be less or the same, for since the water droplets came from the humid air and the baking soda, it cannot be feasibly possible to be more than the amount in it. (You cannot ask someone with five dollars for seven dollars.) |
| What is baking soda's scientific name? | Sodium bicarbonate |
| Why is the baking soda no longer baking soda after it is heated? | During the time that the baking soda was being heated up the carbon (gas) part of it separated from the sodium and went to the top where it was cooler and could percipitate. Thus, when just sodium is mixed with tea in comparison to sodium bicarbonate mixed with tea, the results are clearly going to be different. |
| In the heating baking soda lab, what was the control group? | The unheated baking soda (We controlled what was in it) |
| In the heating baking soda lab, what was the experimental group? | The heated baking soda |
| In the heating baking soda lab, what five things are control group factors? | Same type of tea, same amount of tea, .5cm of baking soda in each test tube, same stirring time, and same size test tubes. (Things we could control) |
| In the heating baking soda lab, what was the independent variable? | Temperature (Doesn't depend on anything else.) |
| In the heating baking soda lab, what was the dependent variable? | Color of tea (Depends on the temperature-if baking soda wasn't heated the gas wouldn't have separated from the sodium and when mixed with tea it would have been the same result as the non-heated tea) |
| In the heating baking soda lab, what was an indicator for change? | The tea |
| What is the formula for volume? | LxWxH |
| What is the unit of measure of liquid volume? | Milliliter (ML) |
| Why does the picture in the science book of the glass tube have the increments closer together near the top? | As the cone rises the surface area increases and the depth of the increments decreases. |
| How accurate should you be when measuring volume? | +/- .02 |
| If you believed a line was exactly 3.2 cm long, how would you show that? | 3.20 (The zero means it was not rounded nor does it mean greater than 3.18 and less than 3.22) |
| What are the 2 most important rules in IPS? | Wearing safety goggles throughout all labs and reporting all accidents, no matter how minuscule, to Mr. Leeds immediately. |
| What is the nurse's extension number? | 2828 |
| What are the 3 things used as safety equipment? | Fire extinguisher, fire blanket, and eye wash shower |
| What action should you do to detect chemicals during a lab? | You should waft them |
| How long should you flush your skin if it was in contact with chemicals? | 5 minutes |
| True or false: A glass that is hot will look different from a glass that is cold? | False: Hot and cold glass are indistinguishable |
| True or False: While a test tube or beaker is being heated you may not look into it. | True |
| True or False: If you begin a lab only to discover your beaker has a slight chip in it, you should continue with what you are doing deeming that it is no big deal. | False, any kind of cracked test tube, beaker, or etc. must be promptly discarded into the proper waste receptacle. (The glass box) |
| If you wish to dilute acid, what must you add to it? | Trick question: Do not add a substance such as water to acid, but rather, add acid to water. This is done due to the fact that water is less dense than acid so it will sit on top, instead of sinking to the bottom |
| True or False: If you are performing a lab where you use a burner and you and your lab partner need to ask Mr. Leeds a question, you should leave your station quickly, with the burner on, and hurry back. | False: a lit burner should never be left unattended |
| Before using an alchohol burner, what must (girls specifically) you do? | Roll up sleeves and pull back hair |
| What must never be added to acid? | Water |
| What could happen if water is added to acid? | It could cause an exothermic reaction |
| What two things must you do after an experiment before leaving class? | Make sure all heating sources are turned off, and clean-up area and materials |
| What two things should you never waft? | Solids and powders |
| True or False: Using force to insert or remove a test tube is okay, but never apply pressure during any other times. | False: You should never apply force to any glass, even if it is to remove or insert it |
| At who should you point the open end of a hot test tube at, and at what time is this appropriate? | Trick Question: It is never appropriate to point the open end of a hot test tube at anyone, yourself included. |
| True or False: Look down into a test tube/beaker while it is being heated so you may check on the chemicals. | False: Never look down into a test tube/beaker while it is being heated. |
| How many meters equals 1 centimeter? | .01 meters |
| True or False: Milliliters are not equal to cm (cubed) | False: they are the same |
| In the water displacement lab, what purpose did different lab groups having different amounts of sand serve? | It proved that it doesn't matter how much sand you started out with, you're still going to get about 40% air space. |
| What is the formula for finding out dry sand without air? | Volume of sand and water minus the volume of the water. |
| What is the formula for finding out the volume of the air? | Volume of dry sand (with air) minus the volume of sand alone. |
| What is the formula for finding out what fraction of air was in the sand? | Volume of air space divided by volume of dry sand (With Air) |
| What does "of" generally mean in a word problem? (Ex. How much of the dry sand was air space?) | It means whatever comes directly after it will most likely be going on the bottom of a fraction. (Ex. Volume of air space over volume of dry sand) |
| How do you find the volume of sugar? | Use a liquid in liquid displacement other than water |
| How do you find the volume of a cork stopper? | Measure the volume of a weight, put a weight on the cork stopper, subtract the volume of the weight and the water. |
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