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Daily Routine Sit in your appropriate seat quietly

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1 Daily Routine Sit in your appropriate seat quietly
Make sure you are wearing your ID’s Have all necessary materials out All back packs on the floor All cell phones on silent and away in backpacks All IPods off and headphones out of your ears Hats off No food or drink except for water

2 Biology Announcements
No Homework

3 Water: It’s Important to Life
Chemistry in Biology What are we made out of?

4 I will be able to… Describe a hydrogen bond
Discuss the similarities and difference of polar and nonpolar covalent bonds Model and perform experiment pertaining to water properties Describe the difference between a solute and solvent in solution Describe the difference between acids and bases Measure the pH of different household produce

5 Water vs. Metals Open your lab notebooks to the table of contents
Write the title Water vs. Metals on the next available line in the table of contents list Turn to the next available page and title the page Water vs. Metals along with today’s date Skip a couple a couple of lines and write Demonstration 1: Water vs. Aluminum

6 Water vs. Metals Write the question, Will aluminum sink or float in water?, right below the demonstration title Write a hypothesis using the following format: If the aluminum foil is placed in water, then is will sink ____% of the time because _____. Fill in the blanks with your thoughts from previous experiences. Write the following materials down: water, Dixie cup, aluminum foil, paper clip, and paper towel

7 Aluminum Foil Crumpled
Water vs. Metal Under your hypothesis, create a table with three columns and three rows Collect the necessary materials Try the two different tests and fill out both the hypothesis observations Hypothesis Observations Aluminum Foil flat Aluminum Foil Crumpled

8 Dropping the paper clip
Water vs. Metal Skip a couple a couple of lines and write Demonstration 2: Water vs. Aluminum Paper Clip Under your hypothesis, create a table with three columns and three rows Hypothesis Observations Dropping the paper clip Flat paper clip

9 Water vs. Metal Try the two different tests and fill out both the hypothesis observations To perform the flat paper clip test, carefully place a small piece of paper towel flat on the water Carefully lay the paper clip flat on the paper towel a wait a minute or two After the demonstrations are done, write a two to four sentence analysis of your observations from both demonstrations

10 Water vs. Metal Conclusion
Write a paragraph or two answering the following questions: Was your hypothesis supported or not supported? Why or why not? Explain using your observations. Why do you think certain test had the aluminum sink while other tests had the aluminum float? What special property gives water the ability to sustain floating metals? Why is this important to real life situations?

11 How do water molecules connect to one another?
Water is made up of two elements: Oxygen and Hydrogen (2) Water molecule holds atoms together with a covalent bond (sharing) Atoms don’t share evenly Hydrogen side is more positive Oxygen side is more negative Forms a polar molecule because of slight charge

12 How do water molecules connect to one another
Think of water molecule like a magnet The positive side has an attraction to the negative side of another molecule Attraction between water molecule forms a linked chain The attraction between the different slight atom charges forms a hydrogen bond

13 How do water molecules connect to one another

14 Daily Routine Sit in your appropriate seat quietly
Make sure you are wearing your ID’s Have all necessary materials out All back packs on the floor All cell phones on silent and away in backpacks All IPods off and headphones out of your ears Hats off No food or drink except for water

15 Biology Announcements
No Homework

16 Water: It’s Important to Life
Chemistry in Biology What are we made out of?

17 I will be able to… Describe a hydrogen bond
Discuss the similarities and difference of polar and nonpolar covalent bonds Model and perform experiment pertaining to water properties Describe the difference between a solute and solvent in solution Describe the difference between acids and bases Measure the pH of different household produce

18 How do water molecules connect to one another?
Water is made up of two elements: Oxygen and Hydrogen (2) Water molecule holds atoms together with a covalent bond (sharing) Atoms don’t share evenly Hydrogen side is more positive Oxygen side is more negative Forms a polar molecule because of slight charge

19 How do water molecules connect to one another
Think of water molecule like a magnet The positive side has an attraction to the negative side of another molecule Attraction between water molecule forms a linked chain The attraction between the different slight atom charges forms a hydrogen bond

20 How do water molecules connect to one another

21 What cause water keep the metal floating in the demonstrations?
Water has a high surface tension Surface tension is how molecules contract to resist external forces Best with thing with greater surface area Water’s surface tension occurs due hydrogen bonding

22 Special Properties of Water Due to Hydrogen Bonding
Specific Heat – ability to resist change in temperature High boiling point Takes a long time to cool down or heat up Helps regulate cell temperature

23 Special Properties of Water Due to Hydrogen Bonding
Specific Heat – ability to resist change in temperature Cohesion – attraction between different water molecules: Convex shape Examples – Dew in the morning Beads of rain water on cars

24 Special Properties of Water Due to Hydrogen Bonding
Specific Heat – ability to resist change in temperature Cohesion – attraction between different water molecules Adhesion – attraction of molecule to other substances: Concave shape Example: meniscus in a graduated cylinder

25 Daily Routine Sit in your appropriate seat quietly
Make sure you are wearing your ID’s Have all necessary materials out All back packs on the floor All cell phones on silent and away in backpacks All IPods off and headphones out of your ears Hats off No food or drink except for water

26 Biology Announcements
No Homework

27 Water: Forming Solutions
Chemistry in Biology What are we made out of?

28 I will be able to… Describe a hydrogen bond
Discuss the similarities and difference of polar and nonpolar covalent bonds Model and perform experiment pertaining to water properties Describe the difference between a solute and solvent in solution Describe the difference between acids and bases Measure the pH of different household produce

29 Water vs. Metals Open your lab notebooks yesterday’s exercise
Continue with today’s water’s exercise at the end of yesterday’s conclusion. Write down demonstration 3: Water covering Penny Write down the following materials: penny, water, cup, eye dropper, paper towel

30 Hypothesized amount of drops Actual amount of drops to cover
Water vs. Metals Under your materials list, create a table three columns and two rows Collect the necessary materials Fill out both the hypothesis, actual and observation areas when and after performing the demonstration Hypothesized amount of drops Actual amount of drops to cover Observations

31 Water vs. Metal Conclusion
Answer the following question(s): What water property(ies) did you observe in this demonstration? Explain how these properties work with water at a molecule level in this demonstration. Use your observations to help support your answer. After you complete these questions, work on chapter vocabulary words starting on page 36. Complete words for sections After you complete these words, work on vocabulary from sections 2.4 through 2.5

32 Daily Routine Sit in your appropriate seat quietly
Make sure you are wearing your ID’s Have all necessary materials out All back packs on the floor All cell phones on silent and away in backpacks All IPods off and headphones out of your ears Hats off No food or drink except for water

33 Biology Announcements
No Homework

34 Bell Work Describe how water forms a hydrogen bond

35 Water: Forming Solutions
Chemistry in Biology What are we made out of?

36 I will be able to… Describe a hydrogen bond
Discuss the similarities and difference of polar and nonpolar covalent bonds Model and perform experiment pertaining to water properties Describe the difference between a solute and solvent in solution Describe the difference between acids and bases Measure the pH of different household produce

37 Bell Work What is a hydrogen bond?

38 Water vs. Metal Conclusion
Answer the following question(s): What water property(ies) did you observe in yesterday’s demonstration? Explain how these properties work with water at a molecule level in this demonstration. Use your observations to help support your answer.

39 Why do things dissolve in water?
Water molecule is a polar molecule with weak charges Ions break up and fill in the voids between hydrogen bonds Other nonpolar molecules can take up the space between water molecules This important in cells and blood so important ions and molecules can be transported

40 What does dissolve different materials make?
Solutions – a mixture of substances that is the same throughout Has two parts: Solvent is the substance that is present in greatest amount Solute is the substance that dissolves in a solvent Blood is a solution Solvent: water Solute: proteins, sugars, lipids

41 Why do some solutions burn and others don’t?
Solutions have different pH values. pH – the concentration of H+ ions in a solution Acids – a solution that contains a high concentration of H+ ions Bases – a solution low in concentration of H+ ions Dependent on how items release or absorbs H+ ions in solution

42 pH scale

43 Daily Routine Sit in your appropriate seat quietly
Make sure you are wearing your ID’s Have all necessary materials out All back packs on the floor All cell phones on silent and away in backpacks All IPods off and headphones out of your ears Hats off No food or drink except for water

44 Biology Announcements
No Homework

45 Chemistry in Biology What are we made out of?
Measuring pH Chemistry in Biology What are we made out of?

46 I will be able to… Describe a hydrogen bond
Discuss the similarities and difference of polar and nonpolar covalent bonds Model and perform experiment pertaining to water properties Describe the difference between a solute and solvent in solution Describe the difference between acids and bases Measure the pH of different household produce

47 Things to do today… Finish vocabulary in sections 2.1-2.3
Leave vocabulary out so I can check it off Get lab notebook and textbook Open to page 58 and copy down the problem, materials, and procedure, and analyze and conclude section in your lab notebooks Work on vocabulary from section

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