CHEMISTRY SABIS Grade 12 Chapter 1 lesson Significant figures

Grade 11 SABIS
Chapter 1 from Grade 12 Syllabus

Significant numbers

Poll

Superhero Chemistry! 🦸
If you were a chemist superhero, what would you want your superpower to be?

• Ability to change any material into gold 💰

• being Super-fast in running by

  molecule manipulation 🌀

• Invisibility by bending light around you 🕶️

• Creating endless energy with a snap of your fingers ⚡

Remember Rules of S.f.

Multiple Choice

0.0025 ➡️ has ......... significant figures (the zeros are not counted as they are on the left ).

• 3

• 2

• 0

• 5

Multiple Choice

1002 kg ➡️ has .....................significant figures (the zeros are counted in between )

• 3

• 2

• 0

• 4

Remember Rules of S.f.

Multiple Choice

50.00 ➡️ has ............... significant figures (all zeros are counted as there is decimal ).

• 4

• 2

• 3

• 1

Remember Rules of S.f.

Multiple Choice

1500 ➡️ have ............. significant figures (zeroes not significant as no decimal )

• 3

• 2

• infinite

• 4

Remember Rules of S.f.

Multiple Choice

200 people in a room ➡️ (200 is exact and thus has ....................... significant figures).

• 3

• 2

• infinite

• 4

Poll

If you could have any type of food served every day in the school cafeteria, what would it be?

Options:

A) Pizza Party Every Day! 🍕
B) Sushi Spectacular 🍣
C) Burger Bonanza 🍔
D) Taco Tuesday... Every Day! 🌮

• A

• B

• C

• D

​Grade 11 SABIS Chapter 1 from Grade 12 Syllabus

​Precision and Accuracy

Multiple Choice

Which statement best describes the difference between accuracy and precision?

• A) Accuracy is about hitting the target's center, while precision is about the repeatability of measurements, regardless of their proximity to the center.

• B) Accuracy and precision both describe how close measurements are to each other, without considering the target.

• C) Precision describes how close measurements are to the center of the target, and accuracy describes the repeatability of these measurements.

• D) Accuracy refers to the color of the darts, while precision refers to the size of the dartboard.

Multiple Choice

Which one is accurate and precise ?

• A

• B

• C

• D

Multiple Choice

Which one is not accurate but precise ?

• A

• B

• C

• D

Multiple Choice

Which one is neither accurate nor precise ?

• A

• B

• C

• D

Poll

Ideal Campus Day 🏫
Imagine your perfect day on a college campus. What activity would you most look forward to?

• Exploring advanced laboratories and engaging in cutting-edge scientific research 🧬

• Participating in a vibrant seminar discussing classic and modern literature 📚

• Joining a dynamic workshop on entrepreneurship and business innovation 💼

• Attending a diverse cultural festival showcasing music, art, and international cuisines 🌍

• Volunteering at a community health fair, educating and assisting in basic health screenings 🍏

​Grade 11 SABIS Chapter 1 from Grade 12 Syllabus

​Types of Errors

Multiple Choice

During a month-long study, an automated weather station consistently records the temperature 2 degrees Celsius higher than the actual temperature due to a malfunctioning sensor.
Is this error systematic or random?

• systematic error

• random error

Multiple Choice

A biologist measures the length of fish from the same pond using a ruler that is incorrectly marked, starting at 1 cm instead of 0 cm, thereby adding an extra centimeter to each measurement.
Is this error systematic or random?

• systematic error

• random error

Multiple Choice

A chemist uses a balance to weigh samples, and the readings vary slightly with each measurement (e.g., 5.1 g, 5.3 g, 5.2 g) due to slight air currents in the room.
Is this error systematic or random?

• systematic error

• random error

Multiple Choice

What is the correct result of the following operation when considering significant figures?
34.789 + 1.6

• 36.389
  

• 36.39

• 36.4

• 36

Multiple Choice

choose

• A

• B

• C

• D

Multiple Choice

Three different people weigh a standard mass of 2.00 g on the same balance.  Each person obtains a reading of 7.32 g for the mass of the standard.  These results imply that the balance that was used is ____.

• 
  accurate

• precise

• accurate and precise

• neither accurate nor precise

Multiple Choice

Which Student is the most Precise?

• 
  Alex

• Shandra

• Luis

Multiple Choice

A set of data are all close to each other, and they are close to the actual value.  This set of data can be described as...

• 
  accurate

• precise

• both precise and accurate

• neither precise nor accurate