CPET Final Exam

Arjun and Anika are exploring the magical world of chemistry! They stumble upon a mysterious chemical formula. Can you help them uncover the secret? What do the coefficients in a chemical formula reveal?

• number of atoms of an element in a compound

• percent composition of that element in a compound

• number of molecules of that compound

Emma and Samuel are in a chemistry class, and they stumble upon a magical potion that claims to create new atoms! But wait, which scientific law would tell them that this is impossible?

• law of definite proportions

• law of conservation of mass

• law of percent composition

Tags

NGSS.MS-PS1-5

In the magical world of chemistry, Michael and Scarlett are trying to balance a potion recipe. What do they need to adjust to make sure the potion works perfectly?

• subscripts

• superscripts

• coefficients

Tags

NGSS.MS-PS1-5

During a chemistry experiment, Samuel noticed the beaker was getting hot to the touch. What kind of reaction is he likely observing?

• endothermic

• exothermic

• precipitating

• about to explode

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

In a lab experiment, Ravi observed that a chemical reaction absorbed heat from the surroundings. What type of reaction did Ravi witness?

• endothermic

• exothermic

• neutralization

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Imagine you're a detective like Mia, solving the mystery of chemical bonding. Which electrons are the real culprits in forming bonds?

• valence electrons

• electrons in fully occupied orbitals

• stable inner electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In their quest to create the perfect elixir, Emma, Liam, and Noah are curious about which component of their mixture is the most abundant. What is your guess?

• solvent

• solute

• crystals

• atoms

Aria and Grace are on a quest to find the most acidic substance! Which of the following would have a pH of less than 7?

• baking soda

• pure water

• carbonic acid

Aria and Maya are exploring the world of pH levels. Which of the following substances should they select if they are looking for something with a pH above 7?

• ammonia solution

• lemon juice

• vinegar

In a thrilling science showdown, Aiden and Abigail are comparing two mysterious substances. Substance A has a pH of 2, while Substance B has a pH of 3. Which of the following is true about these intriguing substances?

• Substance A has more basic properties than substance B.

• Substance B has more acidic properties than substance A.

• Substance A is ten times more acidic than substance B.

• Substance B is ten times more acidic than substance A.