Science 6 Chemistry Review Questions

A student finds a block of metal that has a mass of 45 g, and a volume of 5 cm³. What is the density of the block of metal?

• 9 g/cm3

• 5 g/cm3

• 40 g/cm3

• 0.9 g/cm3

A student finds a gold ring that was measured to have a mass of 25 g. Through water displacement, the student finds that the volume of the bead is 5 cm^3.

Using the table, what is the likely identity of the gold ring?

• brass

• aluminum

• rose gold

• platinum

Tags

NGSS.MS-PS1-2

A group of students are attempting to determine what can determine whether a chemical change has occurred. They say the following things:

Student One: Change in color

Student Two: Change in temperature

Student Three: Formation of a precipitate

Student Four: Formation of a gas

Which student has correctly determined that a chemical change has occurred?

• One and Three

• One only

• Three only

• All four students

Tags

NGSS.MS-PS1-2

What can be found on the Periodic Table of Elements?

• Atoms

• Molecules

• Compounds

• Elements

Which of the following describes the properties of a metal?

• does not conduct electricity; attracted to magnets; brittle

• sometimes conducts electricity; malleable

• conducts electricity; always attracted to magnets; malleable

• does not conduct electricity, not attracted to magnets; brittle

Tags

NGSS.MS-PS2-3

Ms. Harris and her students are observing several chemical reactions. Which of the following observations is qualitative?

• The liquid changed from blue to light blue.

• The liquid went from 18 to 20 degrees Celsius.

• The reaction took 15 seconds.

• The liquid released three gas bubbles.

A student finds a block of metal that has a mass of 36 g, and a volume of 9 cm³. What is the density of the block of metal?

• 3 g/cm3

• 25 g/cm3

• 4 g/cm3

• 15 g/cm3

Tags

NGSS.MS-PS1-2

Which student correctly matches the tools a scientist would use to find the volume of an object?

• Maria: microscope

• Hector: triple beam balance

• Simon: graduated cylinder

• Alice: thermometer

Two elements, Na (sodium) and Cl (chlorine), are often combined to make a substance you use every day, NaCl. NaCl is often called table salt. Na is an example of a:

• subatomic particle

• element

• compound

• molecule

Tags

NGSS.MS-PS1-1

Travis used the triple beam balance to measure a rock. If he adds another rock that with a mass of 23 g, what is the new total on balance?

• 142 g

• 165 g

• 119 g

• 123 g