1-3 Digital textbook and basic skills

• Natuurkunde
• Middelbare school
• vwo
• Leerjaar 3

Basic skills and pressure

(p. 17)

Bluetooth 

- ON

- VPN off

Stationary

- textbook and writingbook

- Pen, pencil

- Calculator

- iPad

CLASSKICK

- YES

Lessonup

- YES

Schoolbags in

the cuboard

Phones in the phone bag

Lesson goals:

• How do you solve a problem/ question in natural science.
• Determine the circumference and surface area of different shapes.
• Calculate pressure, force 

         and surface area.

• Determine if equilibrium 

        is stable.

Circumference

Circumference

Surface area

square = length x length

rectangle= length x width

tringle= 1/2 x base x perpendicular height

circle =

Example 1

A circle has a radius of 3 cm. Calculate the surface area and circumference of this circle.

Example 2

A square has a surface area of 55cm. What is the circumference of this square?

2

Example 3

A circle has a surface area of 20cm. What is the circumference of this circle?

2

Conversion

Distance or mass

Surface area

Convert 6 cm to meter...

1. 60
2. 6
3. 0,6
4. 0,06

Convert 5 meters to kilometers

1. 5 000
2. 500
3. 0,005
4. 0,0005

Convert 600 m to hectares

3

1. 6
2. 0,6
3. 0,06
4. 0,006

concert 40 km to m

2

2

1. 4 0
2. 40 000
3. 4 000 000
4. 40 000 000

Convert 4,3 dm to liters

3

1. 0,0043
2. 4,3
3. 4 300
4. 4 300 000

Convert 20 mL to liter

1. 0,02
2. 200
3. 2 000
4. 20 000

The surface are of a triangel with a base of 3cm and a perpendicular height of 4,5 cm is ...

1. 6,75 cm
2. 13,5 cm
3. 0,67 cm
4. 7,5 cm

What is the surface area (in cm ) of a circle with a diameter of 5 cm?

2

1. 78,5
2. 19,6
3. 25
4. 20

What is the radius of a circle with a surface area of 450 m ?

2

1. 143 m
2. 12 m
3. 72 m
4. 21 m

A swimming pool with a surface are of 1 250 m has a length of 50 m. what is the width?

2

1. 1 200 m
2. 62 500 m
3. 20 m
4. 25 m

A circle with a radius of 30 cm is
enlarged 3 times. What is the
surface area of the enlarged circle in cm?

2

1. 2 827
2. 942
3. 8 482
4. 25 447

Classkick 2HV-1

Basic skills

slide 1 and 2

Homework

Digital texbook, online

make questions 1, 2, 4, 6, 9, 11

and the test yourself of paragraph 1-1

What have you
learned today?