Pre-Assessment - Chemistry HN

How many centimeters is 2.5 kilometers?

• 2500 cm

• 25000 cm

• 2.5×10⁵ cm

• 2.5×10⁶ cm

Given the data in the table, what is the mean value for the height of plant growth?

• 7.19 cm

• 7.20 cm

• 4.33 cm

• 4.34 cm

What is the independent variable in the student's experiment?

• wing shape

• flight distance

• flight time

• type of paper used

• weight of the airplane

Which of the following is a procedural error in the student's experiment?

• The student launches the paper by hand.

• The student recorded the flight time.

• The student uses different paper for each plane.

• The student accidently broke plane #3 during the 5th trial.

What is one possible future application/extension that the student could attempt if they were to repeat this experiment?

[multiple responses accepted]

Tags

NGSS.HS-ETS1-3

NGSS.HS-LS2-7

What is the purpose of repeated trials in an experiment?

[multiple valid reasons accepted]

What is the atomic number of Ytterbium?

• 39

• 65

• 68

• 70

Select all subatomic particles that make up all atoms

• protons

• neutrons

• electrons

• photons

• positrons

Tags

NGSS.HS-PS1-7

Given a + b = 5 and 73 + 4a + 3b = 100,

solve for the values of a and b.

• a = 10

  b = -5

• a = 12

  b = -7

• a = -4

  b = 9

• a = -8

  b = 13

• a = 2

  b = 3