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Slide 1: Diapositive
ScienceMiddelbare schoolhavo, vwoLeerjaar 1

Cette leçon contient 12 diapositives, avec diapositives de texte.

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Slide 1 - Diapositive

Practice quiz:
  • Do the practice quiz on KWIZL
  • Check another person's work, make sure you give them feedback.
timer
20:00

Slide 2 - Diapositive

Homework for today:
  • Discuss the homework exercises in your groups. 
  • If you cannot work it out in your group you can ask me questions. 
timer
10:00

Slide 3 - Diapositive

Slide 4 - Diapositive

Answers:
  • 13. a. Basic unit of length is: meters.
  • b. Basic unit of volume: liters.
  • c. Basic unit of mass: grams.
  • 14. a. You can use a ruler to measure the length of a pencil. 
  •  b. You can use a scale to measure the mass of a pebble.
  •  c. You can use a clock to measure the time it takes to brush your teeth.
  •  d. You can use a graduated cylinder to measure the volume of water in a glass.
  • 15. a. The best unit for measuring the length of your pencil is centimeters.
  •  b. The best unit to measure the height of the Eiffel tower is meters.
  • c. The best unit to measure the mass of an eyelash is milligrams.
  • d. The best unit to measure the volume of a cup of tea is milliliters or centiliters
  • e. The best unit to measure the time it takes to boil water is minutes.
  • 16. The lab safety rules are:
  • Always be properly protected. This includes wearing safety glasses and a lab coat plus tying back long hair.
  • Do not eat or drink anything in the lab.
  • No running or fooling around.
  • Follow the instructions given for the experiment. If you are in doubt about what you should do, ask your teacher or the lab technician for help.

Slide 5 - Diapositive

Slide 6 - Diapositive

Answers:
  • 17. a. A wash bottle: A squeeze bottle filled with distilled water. It can be used to wash
  •   other equipment or dispense small amounts of water. 
  •  b. A pipet: Used to transfer small amounts of liquids.
  •  c. Beakers: Used for holding, mixing, measuring, and pouring liquid chemicals.
  •  d. Tongs: used to pick up hot containers, materials, etc.
  • 18. a. Height of a mosquito: about 1 centimeter.
  • b. Mass of your chair: about 10 kilograms.
  • c. Volume of a trash can: about 20 liters.
  • d. Area of the top of your desk: about 40 centimeters by 70 centimeters, is about 
2800 cm2
  • e. Time it takes to blink: less than 1 second. 


Slide 7 - Diapositive

Slide 8 - Diapositive

Answers:
  • 20. a. 14 ml; 18 ml; 42 ml; 90 ml.
  •  b. The second one: the scale is very precise for 20 ml.
  • 21. a. 19 C; 63 C; 23 C.
  •  b. Snowy climate means a temperature around 0 C. Thermometer two would be
  • best, as it shows temperature around 0 C. And it has a very fine scale.
  • c. If hot water means a temperature around 100 C, then it would be best to use 
  • thermometer 2. This thermometer goes up to 100 C.

Slide 9 - Diapositive

Slide 10 - Diapositive

Answers:
  • 22. a. Dangers of bleach: corrosive, danger for the environment.
  •  b. The safety symbols for bleach:
  • 23. a. The dimensions of one shoebox equals: 20 x 30 x 15 cm = 9,000 cm3.
  • The dimensions of the large box is: 80 cm x 1.5m (150 cm) x 70 cm = 80 x 150 x 70 = 840,000 cm3.
  • You can stack the boxes…
  • The width of the big box is 80 cm; therefore you can have 80/20 = 4 boxes wide.
  • The length of the box is 1.5 m = 150 cm; therefore 150/30 = 5 boxes deep.
  • The height of the boxes is 70 cm; therefore you can have 70/15 = 4 boxes tall, with some space left over at the top.
  • So, overall you can fit 4 x 5 x 4 = 80 shoeboxes in the large box
  • b. There will be some space left. The total size of the large box - the size that is taken up by the 80 shoeboxes = 840,000 cm3 - (80 x 9,000 cm3) = 840,000 - 720,000 = 120,000 cm3.



Slide 11 - Diapositive

Homework for lesson 5:

  • Study the Quizlet SCIENCE - LAB & Topic 1
  • Study your notes and the lessonups of the last 4 lessons.
  • Next lesson will be a quiz.
  • Read 1.4 about hearing and sound.


Slide 12 - Diapositive