Chemical Properties and Chemical Changes

Monday, 24th: Prepare for an open notebook quiz on Physical Changes.

​Bring your lab coats too!

Multiple Choice

Which of the following do you think are signs of a chemical change?

• Change in shape

• Change in color

• Change in size

• Change in physical state

Multiple Choice

Which of the following is a characteristic of matter that can only be observed as the matter changes into a different type of matter?

• Chemical property

• Physical property

• Mass

• Volume

Open Ended

Describe how flammability is an example of a chemical property.

Open Ended

Describe how the change in color of an apple can be a sign of a chemical change.

Multiple Choice

Which of the following observations is NOT a sign of a chemical change?

• Change in odor

• Change in color

• Formation of bubbles

• Change in size

Multiple Select

Select all the signs that may indicate a chemical change has occurred.

• Formation of gas or bubbles

• Change in color

• Change in odor

• Change in shape

Fill in the Blank

The formation of a solid that cannot dissolve in the solvent during a chemical reaction is called a _______.

Multiple Choice

Which of the following best describes what happens when butter melts on warm toast?

• It is a physical change because the substance remains the same.

• It is a chemical change because a new substance is formed.

• It is both a physical and chemical change.

• It is not a change at all.

Multiple Select

Which of the following are examples of chemical changes?

• Milk goes sour

• Jewelry tarnishes

• Butter melts on warm toast

• Rust forms on a nail

Multiple Choice

A match is lit. Is this an example of a physical change, a chemical change, or both?

• Physical change

• Chemical change

• Both physical and chemical change

• Neither

Multiple Choice

Which of the following is NOT a sign of a chemical change?

• Change in color

• Formation of a gas

• Change in state from solid to liquid

• Production of heat

Drag and Drop

fireworks exploding ​

Placeholder

Drag these tiles and drop them in the correct blank above

chemical change

physical change

Match

Match the following examples of indications of a chemical change.

formation of a precipitate

color change

production of light

gas formation

• formation of a precipitate

• color change

• production of light

• gas formation

Drag and Drop

These show that there has been a chemical reaction:

1. Change in ​

Placeholder

or ​

Placeholder

2. Production of ​

Placeholder

or ​

Placeholder

Drag these tiles and drop them in the correct blank above

Temperature

Color

Gas

Solid

Smell

Drag and Drop

Choose the best answer:

A

Placeholder

increase or decrease and the production of light are both signs that a chemical reaction may have occurred.

Drag these tiles and drop them in the correct blank above

light

odor

precipitate

molecule

temperature

Multiple Choice

In a container, a solid consisting of clear crystals is combined with a blue liquid and the following observations are obtained: How many of the listed observations indicate a new substance was formed?

• 1
• 2
• 3
• 4

Multiple Choice

During a lab experiment, a scientist numbers three beakers. Next, she pours 150 mL of  liquid into each beaker. Each liquid is different.Then, the scientist adds 5 g of white solid baking soda (NaHCO₃) to each beaker and stirs. She observes the results.
In which of the beakers does the scientist observe clear evidence of a chemical reaction?

• beaker 1 only
• beaker 2 only
• beaker 3 only
• beakers 1,2, and 3

Multiple Choice

During a science lab, Jessica records the following data when Liquid A (clear) and Liquid B (clear) are combined in a beaker:
 
Did a chemical change occur? Why? 

• Yes, a new yellow liquid is formed .

• Yes, mixing any two unknown liquids will cause a chemical change. 

• No, there was no change in temperature.

• No, there was no change in the state of matter.

Multiple Choice

Students performed an investigation to see what would happen when sugar is exposed to heat. The students' observations are listed in the table.

Which students’ observations indicate that a new substance formed as a chemical change occurred?

• Student A and Student C

• Student B and Student C

• Student A and Student D

• Student B and Student D

Multiple Choice

Students performed multiple investigations at different stations in the classroom.  The data collected is listed in the table.

The observations from which investigations provide evidence that a new substance was formed?

• Stations 1, 3, 4, and 5

• Stations 2, 5, and 6

• Stations 1, 3, and 4

• Stations 1, 2, 3, and 4

Multiple Choice

A student is investigating the process that changes steel into rust. According to the table, which of the beakers from Investigation 1 does not show evidence of a chemical change?

• Beaker X

• Beaker Y

• Beaker Z