Chemistry Semester Exam

During a science class, Harper asked the teacher about the smallest particles into which an element may be broken down without changing the identity of the element. What was the teacher's response?

• quarks

• nucleons

• atoms

• molecules

Tags

NGSS.MS-PS1-1

During a science class, Priya asked her teacher, "What is the number of protons in an atom?"

• atomic mass

• mass number

• nuclear number

• atomic number

During a science class, Zoe asked her teacher, "What isotope is the atomic mass unit defined relative to?"

• helium-3

• hydrogen-1

• carbon-12

• oxygen-16

Tags

NGSS.HS-PS1-8

Emma is curious about how plants grow towards light. Which step of the scientific method involves thinking about nature to develop an idea about how this process works?

• hypothesizing

• experimenting

• observing

• collaborating

Priya is conducting an experiment and needs to know how many atoms are in exactly one mole of atoms. Can you help her find the answer?

• 1.602 × 10²²

• 6.022 × 10²³

• 6.604 × 10²³

• 6.087 × 10²⁴

During a science experiment, Scarlett is asked to find the temperature that equals 0 K. Which of the following temperatures should she choose?

• -459.67°C

• -273.15°C

• -40.00°C

• 0.00°C

In the solid state of matter, particles have enough energy to move freely but not enough energy to overcome their attraction for each other.

• liquid

• gas

• plasma

• solid

Tags

NGSS.HS-PS3-4

Modified T/F

In a classroom experiment, Luna observed that in the solid state of matter, particles have enough energy to move freely but not enough energy to overcome their attraction for each other.​ (a)  

• liquid

• solid

• true

• plasma

• gas

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Mia is conducting an experiment to measure the boiling point of water. She wants to know how closely her measured value matches the actual boiling point of water. This is known as precision.

• true.

• false.

• accuracy.

• reliability.

Modified T/F

When Hannah measures the length of a table, how closely her measured value matches the actual length is precision.​ (a)  

• accuracy

• true