Semester Exam Review

A sledgehammer has a mass of 3.5 kilograms. What net force, to the nearest whole newton, will a person need to apply to accelerate the sledgehammer at a rate of 4.0 m/s²?

Tags

NGSS.MS-PS2-2

Which rocket had the greatest acceleration?

• Rocket 1

• Rocket 2

• Rocket 3

• Rocket 4

Tags

NGSS.MS-PS2-2

According to Newton’s first law, what happens to the steel ball just after the box stops?

Tags

NGSS.MS-PS3-5

Immediately after they push away from each other, how does the motion of the mother and daughter change?

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The net force on a vehicle that is accelerating at a rate of 1.5 m/s² is 1,800 newtons. What is the mass of the vehicle to the nearest kilogram?

Tags

NGSS.MS-PS2-2

Based on these observations, which statement contains the best evidence that a chemical reaction occurred?

• Liquid 1 was colorless.

• Liquid 2 was colorless.

• The mixture of liquids 1 and 2 formed a colorless solution.

• Small, solid particles formed and fell to the bottom of the beaker.

Tags

NGSS.MS-PS1-2

Two solutions are mixed and react to produce the solid precipitate AgCl. The chemical reaction is shown by the balanced chemical equation: AgNO₃ + NaCl → AgCl + NaNO₃ What happens to the total mass as the reaction takes place?

Tags

NGSS.MS-PS1-5

A compound secreted by honeybees to paralyze intruders in their hive is known as 2-heptanone. The formula for this compound is shown: CH₃C₄H₈COCH₃. How many atoms of each element are in one molecule of 2-heptanone?

• 4 Carbon

  11 Hydrogen

  1 Oxygen

• 7 Carbon

  14 Hydrogen

  1 Oxygen

• 7 Carbon

  11 Hydrogen

  8 Oxygen

• 6 Carbon

  14 Hydrogen

  3 Oxygen

Tags

NGSS.MS-PS1-1

A star that has a luminosity of 10^-2 and a temperature of 20,000 K is most likely a —

• Red giant

• White dwarf

• Main sequence

• Blue giant

The Hertzsprung-Russell diagram shown is divided into four sections. Which section of the diagram includes the coolest, brightest stars?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-ESS1-3