Physical Science Benchmark

Which statement provides evidence that mass is conserved in the reaction?

• Two new substances are formed in the products

• Water is one of the products, but not one of the reactants

• Two hydrogen atoms are in the reactants and two hydrogen atoms are in the products

• One chlorine atom pairs with one sodium atom in the products and one chlorine atom pairs with one hydrogen atom in the reactants

Tags

NGSS.MS-PS1-5

For an investigation a student records data about 3 unknown substances. The student then calculates the densities of the unknown substances and compares them to the table of densities of known substances. Unknown substance 1: Mass 6.95g Volume: 4.0cm³ Unknown Substance 2: Mass 4.54g Volume: 2.0cm³ Unknown Substance 3: Mass 5.40g Volume: 3.0cm³ Which unknown substance is most likely carbon?

• Unknown Substance 1

• Unknown Substance 2

• Unknown Substance 3

• None of them

Tags

NGSS.MS-PS1-2

What is the difference between velocity and the speed of an object?

• Velocity is the change in distance over time, while speed is the change in velocity over time

• Velocity has a direction associated with it, while speed has no specific direction

• Velocity has no direction associated with it, while speed has a specific direction

• Velocity is the change in speed over time, while speed is the change in distance over time.

An object will continue moving in a straight line unless it is acted on by an unbalanced force. Which of the following best explains Earth's motion?

• There is no unbalanced force acting on Earth because space is empty and nothing touches Earth

• The gravitational force pulling Earth toward the sun is equal and opposite to the force pulling the sun toward Earth, so there is no unbalanced force acting on Earth

• The sun moves in an elliptical orbit around Earth, and the sun's gravity pulls Earth along.

• Earth moves in an elliptical orbit around the sun because the gravitational force of the sun attracts Earth

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Two cars with different masses travel at the same speed down a hill toward a stop sign. What will happen when both cars apply brakes at the same time to stop?

• The car with the smaller mass will require less force to stop than the car with the larger mass.

• The car with the larger mass will maintain its velocity while traveling down the hill

• The car with the smaller mass will take longer to stop than the car with the larger mass.

• The car with the larger mass will have less inertia than the car with the smaller mass.

Tags

NGSS.MS-PS2-2

A balance and a graduated cylinder are used to determine the density of a mineral sample. The sample has a mass of 14.7 g and a volume of 22cm³. What is the density of the mineral sample?

• 0.15g/cm³

• 32 g/cm³

• 13 g/cm³

• 6.7 g/cm³

Tags

NGSS.MS-PS1-2

An athlete is trying to lift some weights. He successfully lifts 200 N weights, but when he tries to lift 400 N weights, he is unsuccessful.

Which of these correctly compares the amount of work the athlete does on the weights?

• The athlete does no work on either the 200 N weights or the 400 N weights.

• The athlete does no work on the 200 N weights but does work on the 400 N weights

• The athlete does work on both the 200 N weights and the 400 N weights

• The athlete does work on the 200 N weights but does no work on the 400 N weights.

A student drew the diagram below to show the movement of water through a hydroelectric dam. The student used the diagram to describe changes in the potential and kinetic energy of the water. At which location is the gravitational potential energy of the water the greatest?

• Location W

• Location X

• Location Y

• Location Z

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-2

The diagram below shows two different forces acting on a cyclist riding a bicycle. The total mass of the cyclist and the bicycle is 100kg. based on this information, what is the acceleration of the cyclist?

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A researcher wants to experiment with an element that reacts with an element like phosphorus(P) but has a greater atomic mass. Which element should the researcher select for the experiment?

• Nitrogen (N)

• Sulfur (S)

• Arsenic (As)

• Silicon (Si)

Tags

NGSS.MS-PS1-2