Unit 1 Class Notes - Review

Multiple Choice

Who are the key figures 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 theoretical, Quantities are measured

• Numbers have units, Quantities do not

• Numbers are used in science, Quantities are used in math

• Numbers are specific values, Quantities are ranges of errors

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

Reasoning is __________________.

• A statement of conclusion that answers the original question/problem

• Scientific data that supports the claim

• A logical explanation that connects the evidence to the claim

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 drawn as squares

• Include labels and/or a key

• Particles of different substances have the same color

• Draw a reasonable number of particles to show your argument

Multiple Choice

What significant change regarding the kilogram was adopted in 2019?

• New definition based on Planck's constant

• Reintroduction of the original kilogram

• Change to a different unit of mass

• Elimination of the kilogram as a unit

Open Ended

Which has a great mass? Explain.

Fill in the Blanks

A student measured three objects made of different materials. The table shows each object’s mass and volume.

Order the materials from least dense to most dense, write the number in the correct order.

1. glass 2. rubber 3. wood

Multiple Select

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

• $6.50

• $30.00

• $4.50

• $21.77

• $3.80

Multiple Choice

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

• Size

• Material

• Color

• Shape

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

• 300 cm

Multiple Choice

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

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

• Accuracy refers to 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 volume and the space a substance occupies?

• Volume is the weight of a substance

• Volume is the entire space a substance takes up

• Volume is the temperature of a substance

• Volume is the color of a substance

Multiple Choice

What are the rules for determining significant figures?

• All natural numbers 1-9 count once.

• Zeros always count between natural numbers.

• Zeros in front of natural numbers never significant.

• Zeros at end are significant if a decimal point is present in the number.

Fill in the Blanks

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 Examples

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

In multiplication and division, you should round to the least number of ___

• decimal places

• significant figures

• whole numbers

• fractions