Unit 1 Class Notes

Multiple Choice

Who are the scientists depicted in the image related to the Oxygen Saga?

• Antoine Lavoisier

• Joseph Priestley

• Robert Boyle

• John Dalton

Multiple Choice

What are the key differences between numbers and quantities as described in the image?

• Numbers are used in science class

• Quantities are theoretical values

• Numbers have units

• Quantities are measured and experimental

Multiple Choice

What are the components of a good model?

• Particles

• Labels

• Key

• Arrows to show direction or movement

Multiple Choice

Imagine you're a detective in the world of science! What would the 'claim' represent in your scientific investigation, also known as claim evidence reasoning?

• The clues you've gathered

• The big reveal or main idea

• The thought process behind your claim

• The analysis of your findings

Multiple Choice

What is the purpose of evidence in scientific claims?

• To provide opinions

• To support the claim

• To confuse the audience

• To summarize findings

Open Ended

Why is the evidence important?

Multiple Choice

During an experiment, a student combines a solid, metallic substance with a clear liquid in a beaker. The mixtures turns hot, produces bubbles, and sparks. Based on the observations, the student can conclude that –

• A. a phase change has occurred.

• B. atoms have been rearranged to form a new substance.

• C. the products are likely harmful to human skin.

• D. the metal substance is a poor conductor of heat.

Multiple Choice

What are the rules for drawing particle diagrams?

• All particles should be drawn as squares

• Particles of the same substance should have different colors

• Include labels and/or a key

• Number of particles does not represent mass

Multiple Choice

What was the original definition of the kilogram (kg) during the French Revolution?

• Mass of one litre of water

• Mass of one kilogram of gold

• Mass of one litre of mercury

• Mass of one litre of air

Open Ended

Which has a great mass? Explain.

Multiple Select

Match the prices below with the glassware: $3.80, $4.50, $6.50, $21.77, $30.00, $64.34

• $4.50

• $21.77

• $3.80

• $30.00

• $6.50

Multiple Choice

What are the main differences between a 500 ml and a 100 ml volumetric flask?

• Size

• Material

• Shape

• Color

Multiple Choice

The difference between a car hitting a wall vs. a car hitting a hay stack is

• the Impulse on the car hitting the wall is greater
• the change in momentum of the car hitting the wall is greater
• the force on the car hitting the hay stack is greater
• the collision time of the car hitting the hay stack is greater

Multiple Choice

Which number is more precise?

• 50.234 g

• 50.2 g

Multiple Choice

What is the total length of the three rulers shown in the image?

• 150 cm

• 200 cm

• 100 cm

• 250 cm

Multiple Choice

What is the difference between precision and accuracy in scientific measurements?

• Precision is how close the data is to the target value

• Accuracy is how tightly grouped the data is

• Precision is how tightly grouped the data is

• Accuracy is how far the data is from the target value

Multiple Choice

What is the relationship between cubic centimeters and milliliters as shown in the image?

• 1 cm³ = 1 mL

• 1 cm³ = 10 mL

• 1 cm³ = 100 mL

• 1 cm³ = 0.1 mL

Multiple Choice

What are the rules for determining significant figures?

• All natural numbers 1-9 count once.

• Zeros in front of natural numbers are significant.

• Zeros at the end are never significant.

• Zeros always count at the end.

Open Ended

How many sig figs are in 0.005040 kg?

Multiple Choice

What are the four categories represented in the table?

• Vocab/definitions

• Big Ideas/Concepts/Models

• Procedures

• Worked Example(s)

Multiple Choice

What is the result of 2.0 + 5.61 when rounded to the least precise place value?

• 7.61

• 7.6

• 8.0

• 7.5

Multiple Choice

When performing multiplication or division, you should round to the least number of ___

• decimal places

• significant figures

• whole numbers

• fractions

Poll

How confident do you feel about this topic now?

• Very confident
• Somewhat confident
• Not confident