M1 Review: The Central Science (Chem)

____________________ is the study of matter and the changes it undergoes.

• Chemistry

• Biology

• Physics

• Geology

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

____________________ is a measure that reflects the amount of matter in a given sample. It differs from ____________________, which takes into account not only the amount of matter present, but also the Earth's gravitational pull on matter.

• Mass, weight

• Weight, mass

• Volume, density

• Density, volume

Tags

NGSS.MS-PS2-4

Which is NOT an SI base unit?

• second

• meter

• degree Celsius

• kilogram

Which value is NOT equivalent to the others?

• 500 m

• 5000 cm

• 0.5 km

What is the correct representation of 702.0 g in scientific notation?

How many significant figures are there in a distance measurement of 20.070 km?

• 2

• 3

• 4

• 5

An object with a mass of 7.5 g raises the level of water in a graduated cylinder from 25.1 mL to 30.1 mL. What is the density of the object?

• 1.5 g/mL

• 0.75 g/mL

• 1.0 g/mL

• 2.0 g/mL

A Celsius thermometer with a range of –10°C to 110°C can be used to determine when to remove the mixture from heat.

• Yes, because the range covers typical heating temperatures.

• No, because the range is too narrow.

• No, because the thermometer is not accurate enough.

• Yes, because it measures in Celsius.

9) Two undefined numbers expressed in regular notation are shown. If each X represents a significant figure, which of the following is the correct way to write a number with three significant figures in scientific notation?

XXX.XX

Calculate the percent error if the accepted density of the sample is 6.95 g/mL.

• 4.32%

• 0.00%

• 2.15%

• 7.89%