Les 5

• Nask / Techniek
• Middelbare school
• mavo, havo, vwo
• Leerjaar 2

Welcome

NTEC2

Check in

Coats/jackets?

Hats/caps?

Phones?

Headphones?

iPad and notebook?

How are you feeling today?

1. :)
2. :|
3. :(

Rough planning

Lesson 1: Section 1 + 2

Lesson 2: Section 2 (Experiment)

Lesson 3: Section 2

Lesson 4: Section 3

-> Lesson 5: Section 4 <-

Lesson 6: Practice Test

Lesson 7: 2-Test 

Lesson 7: Waterpump

Section 4

Today you'll learn about different ways to purify water.

You will also learn how to separate mixed substances.

Goals

After this class you can explain two ways to separate mixtures

Repetition quiz

A little quiz about last week!

You did an exercise about density of an object. What does density mean?
(g/cm3 or kg/m3)

1. The amount of volume per mass unit
2. The amount of mass per volume unit
3. How heavy something is
4. How big something is

Complete the formula:
density =

1. mass / Volume
2. Volume / mass
3. mass x Volume
4. Volume x mass

What are the three phases?

1. water, ice, gaseous
2. solid, liquid, gaseous
3. liquid, gaseous, ice
4. solid, mist, gaseous

When melting a substance, you see the temperature staying the same.
What do you call this?

1. The melting dot
2. The melting range
3. The melting area
4. The melting point

In what phase is alcohol at 20 degrees Celsius?

1. Solid
2. Gaseous
3. Liquid

Name three examples where you'll find hydraulics

If you had...

...no mistakes: Good for you!

...question 1 and 2 wrong (density): remake exercise 5

...question 3 wrong (phases): remake exercise 6

...question 4 and 5 wrong (change in phase): remake exercise 6.6

...question 6 wrong (hydraulics): come to me for extra explanation

Water purification

How can we separate mixtures?

Purification examples

Sedimentation (bezinken) 

Adsorption (adsorptie) 

Centrifugation (centrifugeren)

Distillation (distillatie)

Experiment

Disclaimer about last week

Have your method (stappenplan) checked by me

Worksheet on Google Classroom

Clean up:

Rinse off all the glasswork (no more sand)

Put all the materials in their place

Dry off any wet surface

Next week:

Practice test about section 1 to 4