Welcome Back! Open your binder to your

table of contents. Have a SHARPENED

pencil in your hand. Get ready to LEARN!

“Running Desalinization Plants,” p. 103March 9, 2011Objective: You will be able to

scientifically test your solution to a technological problem.

Do Now: What are 2 phase changes that you hope to happen in your desalinization plant? Where will each of them happen?

3/8

Test Your Desalinization Plants Send one volunteer to get a cup of ice. Send one volunteer to get your

desalinization plant. Bring it to me and I will carefully pour in salt water.

Work with your group to set up your desalinization plant.

We will put them on the hot plate at the same time…

Using the Hot Plates If you are anywhere near the hot plate,

you must wear goggles! Seriously! Anyone who touches the hot plate

MUST be wearing oven mitts. The WHOLE hot plate (even the white

part) AND the can will get hot. Set the hot plate to MEDIUM.

While Your Plant is Running… Work on the Chemistry Connections

sheet with your group… it will help you with our quiz on Friday.

If you want, you can send one volunteer at a time to check on your plant.

That volunteer must wear oven mitts! BE CAREFUL OF STEAM! STEAM CAN BURN!!

Let’s Check Out our Plants BE CAREFUL OF STEAM! STEAM CAN BURN!! Anyone who touches the foil MUST

wear oven mitts! Don’t forget your goggles!

Turn Off the Plants (15 min left) Send one volunteer to turn off the hot

plates. This will let them cool.

= water particle= sugar particle

Water particles begin evaporating

Water particles begin evaporating

Salt is left behind!

Water particles have all evaporated

Filter Paper= water particle= CaCO3 particle

Filter Paper= water particle= CaCO3 particle

Filter Paper= water particle= CaCO3 particle

Filter Paper= water particle= CaCO3 particle

Filter Paper= water particle= CaCO3 particle

Filter Paper= water particle= CaCO3 particle

ONLY water particles can go through

Green Marker: Chromatography Paper

3 cm

Focus Question:What happens to a dot of green ink when it gets wet on a piece of paper? Why?• Draw a line of learning.

• What happened?WHY do you think that happened?

More solubleLess soluble Do another line of

learning and use the word “soluble”

Land

Salt dissolves into rivers from landSome ocean water evaporates to atmosphere

Water vapor CONDENSES into a cloud!

Precipitation!

Now the ocean is a LITTLE bit salty, but no saltier than a river. How does it get really salty?

Land

Salt dissolves into rivers from landSome ocean water evaporates to atmosphereWater vapor CONDENSES into a cloud!

Precipitation!

Land

Salt dissolves into rivers from landSome ocean water evaporates to atmosphereWater vapor CONDENSES into a cloud!

Precipitation!

Land

Salt dissolves into rivers from landSome ocean water evaporates to atmosphereWater vapor CONDENSES into a cloud!

Precipitation!

Let’s Find the Winner Work with your group to pour the

treated water into a graduated cylinder.

Be ready to hand it to me as I test its conductivity.

If the green light doesn’t turn on, it is desalinized!

Share if time… What were the most

successful parts of the desalinization plants?

If time, go over homework

Confirm, Correct, Complete1. Pour an even amount of soil in

each container and plant one seed in each container.

2. Label one pot 5 mL, one 10 mL, and one 15 mL.

3. Water each with the amount written on them.

4. Record the plants height each week.

5. Repeat steps 1 – 4 two more times for trials 2 and 3.

C.V.

M.V.

Repeated trials

R.V.record After 2 weeks

Confirm, Correct, Complete1. Label 4 pots 2 mL, 4 mL, 6 mL,

and 8 mL.2. Plant 3 radish seeds in each

pot.3. Every three days, water the

pot with the amount written on the pot using pH 6 water.

4. Measure and record the height of the tallest leaf.

5. After 3 weeks, calculate and record the average height for each pot.

M.V.

M.V.Repeated trials

R.V. record

Confirm, Correct, Complete1. Put a 2 inch plant in a pot with

50 mL of soil.2. Add 10 mL of pH 6 water

every day for 2 weeks.3. After 2 weeks, write down

the data.4. Repeat steps 1 – 3 for trials

2 and 3.5. Repeat steps 1 – 4, but with

20 mL of pH 6 water and 30 mL of pH 6 water.

C.V.

M.V.

Repeated trialsMeasure and record the height of the plant

Now, revise your plan!

Green = Confirm (I got this part right!)

Red = Correct (fix a mistake)

Blue = Complete (add stuff you didn’t have before)

Exit Ticket, 3/9 What are two

improvements you would make to your desalinization plant? Why?