What is the purpose of using significant figures in measurements?

• To show how accurate a measurement is

• To confuse scientists

• To make measurements look bigger

• As a form of entertainment

Which is the correct way to write the number 720,000,000 in scientific notation?

• 7.2 x 10⁸

• 720 x10⁶

• 7.2 x 10⁻⁸

• 7.2 x 10⁻¹⁰

What should you do at the end of a laboratory experiment?

• Wash your hands

• Clean up your lab station and wash your hands

• Read the directions to see what you should have done

• Dump everything down the drain and throw glassware in thesink

In the metric system, what is the basic unit of volume?

• Kilogram

• Liter

• Meter

• Celsius

What is an example of a quantitative observation?

• The apple has a mass of 155.2 g

• The apple is red

• The apple has a round shape

• The apple tastes sweet

Tags

NGSS.MS-PS3-1

What is the percent error of a reaction that took 35.2 minutes when the accepted value is 39.8 minutes?

• 4.6%

• 11.6%

• 13.1%

• How am I suppose to figure this out?

An element has 52 protons, 47 neutrons, and 54 electrons. What is the charge AND mass of this ion?

• +2, 106

• -2, 99

• +2, 99

• -7, 106

How many valence electrons would a neutral atom of Gallium (Ga) contain?

• 3

• 4

• 5

• 8

Which elements are more likely to become anions?

• Elements in groups 1

• Elements in group 4

• Elements in groups 7

• Elements in group 8

What is region C?

• Mair

• Giants

• Super giants

• White dwarfs

Tags

NGSS.HS-ESS1-3