Warm-Up & Tickets Out Intro to Chemistry

Warm-Up Turn in Diversity Square & Signed papers 1. Name the equipment: a. b. c. Complete the Warm-Up in either your composition notebook or on a separate piece of paper.

Warm-Up Turn in Diversity Square & Signed papers 1. Name the equipment: a. b. c. 2. What are the steps for using a fire extinguisher? Complete the Warm-Up in either your composition notebook or on a separate piece of paper.

Exit Ticket Whose responsibility is it to keep the lab clean? What is a hypothesis? In the experiment, determine the independent and dependent variable. A chemistry student wanted to know how much studying improved his grade. On the first test, he just looked over the notes and the homework, then took the test the next day. He received an 82 on the test. The second test, he looked over the notes, re-practiced some of the homework, and completed the study guide on blackboard. On this test, he made a 94. He determined that studying was worth his while!

Warm-Up What is the first thing you should do in case of an accident? What do you use to neutralize an acid? How do you dilute an acid? How long do you use an eye wash station if something gets in your eye?

Warm-Up A botanist notices that the petals of her flowering plants uncurl every morning. Since the plants are located next to an open window, she does not know whether the flowers are reacting to the light from the sun or to the time of day (perhaps the flowers have an internal clock!). The botanist creates an experiment to determine whether the flower petals uncurl in response to light. On the first day, she allows the sunlight to stream in the window as usual. She records the amount that the petals uncurl. On the second day, she keeps the blinds close so that no light can enter. She again records the behavior of the petals. What is your hypothesis for this scenerio? What is the dependent and independent variable(s)? What are the controls?

Exit Ticket Express in scientific notation: 1. ) 0.003 2. ) 204000 Convert (show your work): 3.) 2.33 cm to m 4.)145 g to mg 5.) 0.87 mL to kL

Warm-Up Express in scientific notation: 1. ) 0.003 2. ) 204000 Convert (show your work): 3.) 2.33 cm to m 4.)145 g to mg 5.) 0.87 mL to kL

Exit Ticket Convert 1.) 9.6 m to km 2.) 68.7 µl to ml 3.) 20.5 oC to K 4.) 400K to oC

Warm-Up Determine how many significant figures: 1.) 246.32 2.) 14.600 3.) 100 4.) 200. 5.) 32001 6.) 23.7 x 3.8= 7.) 320. - 41.23= 8.) 28.307 x 3.74=

Exit Ticket Calculate the answer with the appropriate number of sig figs. 1.) 14.7 + 12.02= 2.) 23.7 x 3.8= 3.) 320. - 41.23= 4.) 28.307 x 3.74=

Warm-Up Calculate the answer with the appropriate number of sig figs. 1.) 14.7 + 12.02= 2.) 23.7 x 3.8= 3.) 320. - 41.23= 4.) 28.307 x 3.74= 5.) 658.0 + 23.5478 + 1345.29=

Exit Ticket -Calculate the Density Silver has a density of 10.5 g/cm3. What is the mass of 5 cm3 of silver? 2. What is the identity of a metal if you have 2.3 mL of a 18.08g sample of the unknown? 3. What is an independent variable?

Warm-Up 1.) How do you smell anything in lab? 2.) What is a hypothesis? 3.) 789 km to cm 4.)Convert the following to scientific/standard notation. a.) 0.005 b.) 1200500 c.) 1.5 x104 d.) 3.75x10-2 5.) Identify the number of sig figs. a.) 4.023 b.) 0.002050 6.)What volume of silver metal will weigh exactly 2500 g? The density of silver is 10.5 g/cm3.

Exit Ticket 1.)What is the difference between precision and accuracy? 2.) Convert 34 kg to g 3.)What am I going to do to study for the test? (answer honestly)