Chemistry - Sem 1 Review

Calculate the number of kilometers in 285  meters.

• 0.285 km
• 2.85 km
• 285,000 km
• 0.0285 km

The variable that a scientist manipulates in her experiment is the:

• dependent variable
• independent variable
• responding variable
• controlled variable

Calculate the volume of a piece of iron if its density is 7.874 g/cm³ and mass of 15.2 g.

• 0518 cm³
• 1.93 cm³
• 119.7 cm³
• 7.33 cm³

Change over time is best displayed with a:

• pie graph
• circle graph
• bar graph
• line graph

Precision in measurement is indicated by:

• percent error
• accuracy
• significant figures
• relative error

Which describes quantitative data?

• snow is white (unless it's yellow)
• Iron has a density of 7.874 g/cm³
• a leaf is broad and flat
• the length of the track was measured in meters

Tags

NGSS.HS-PS3-1

NGSS.HS-PS4-1

How many significant digits does 2.0050 have?

• 2
• 4
• 5
• 0

H₂ is a __________ gas.

• monotomic
• diatomic
• polyatomic
• atom

H₂O is classified as:

• element
• mixture
• compound
• solution

Tags

NGSS.MS-PS1-1

A heterogeneous mixture is also called a:

• solution
• pure substance
• solvent
• suspension