The factor being tested in an experiment is called the

• control

• chemical

• variable

• unknown

Tags

NGSS.HS-LS1-3

How many significant figures are in the measurement 0.082010 mm?

• 2

• 3

• 5

• 7

The equation 'mass/volume' is for finding

• density

• molarity

• molar mass

• volume

Which is an example of a chemical change?

• sugar dissolving in tea

• ice cubes melting

• trees being cut into logs

• milk fermenting into cheese

Tags

NGSS.MS-PS1-2

Which of the following does NOT indicate a chemical change is occurring?

• gas released

• heat released

• precipitate forms

• melting

Tags

NGSS.MS-PS1-2

In the figure shown, what is the name for the curved line drawn in the picture that forms when liquids are placed in a graduated cylinder?

• curve

• cohesion

• meniscus

• variable

Tags

NGSS.MS-PS1-2

In the figure shown, how should the volume reading for the liquid be recorded?

• 21.7 mL

• 27 mL

• 21.70 mL

• 21.20 mL

When 15.9 g of silver is added to a graduated cylinder containing 30.0 mL of water. The water level rises to the 31.5 mL mark. From this information, calculate the density of silver.

• 15.9 g / 1.5 mL = 10.6 g/mL

• 15.9 g / 31.5 mL = 0.505 g/mL

• 1.5 mL/15.9 g = 0.0943 mL/g

• 15.9 g/30.0 mL = 0.53 g/mL

On the periodic table, groups are the

• horizontal rows

• vertical columns

What charge does an atom have?

• zero

• negative one

• positive two

• negative three