6wk Test Review 2

Some students were investigating the speed of a toy car they built. They performed two trials and recorded their data in the table below. What was the average speed of the toy car during the two trials to the nearest tenth of a m/s? Record your answer and fill in the bubbles on your answer document. Be sure to use the correct place value.

Tags

NGSS.MS-PS3-1

A student is using colored beads to make a model of aluminum sulfate, Al₂(SO₄)₃ . Aluminum atoms are represented by blue beads, sulfur atoms by yellow beads, and oxygen atoms by green beads. What combination of beads should the student use for the model?

• 6 blue, 3 yellow, and 7 green

• 2 blue, 1 yellow, and 4 green

• 2 blue, 3 yellow, and 12 green

• 6 blue, 12 yellow, and 12 green

Tags

NGSS.MS-PS1-1

How many protons, neutrons, and electrons are present in an atom of hafnium, Hf, with a mass number of 179?

• 72 protons, 178 neutrons, 106 electrons

• 72 protons, 107 neutrons, 72 electrons

• 178 protons, 250 neutrons, 72 electrons

• 106 protons, 72 neutrons, 106 electrons

Tags

NGSS.MS-PS1-1

The diagram below shows two different forces acting on a cyclist riding a bicycle. The total mass of the cyclist and the bicycle is 100.0 kg. Based on this information, what is the acceleration of the cyclist?

• 0.66 m/s² backward, because the force of the air slows the cyclist down

• 0.66 m/s² forward, because the applied force is greater than the force of the air

• 2.3 m/s² backward, because the forces are opposite and not equal

• 2.3 m/s² forward, because the cyclist's inertia is greater than the force of the air

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

The graph below shows the motion of a ball rolling on a straight track. What was the ball’s average speed during the time represented in the graph?

• 0.2 m/s

• 0.5 m/s

• 5.0 m/s

• 10.0 m/s

Tags

NGSS.MS-PS3-1

A student wants to use a spinning basketball to model the day-and-night cycle on Earth. What should the student do in order to best model the cause of the day-and-night cycle?

• Spin the ball in different directions

• Tilt the ball while it is spinning

• Paint one half of the ball black and the other half white

• Shine a bright light on one side of the ball

Tags

NGSS.MS-ESS1-1

A student draws the model shown below. Which of these best compares the conditions at Location X and Location Y?

• It is day at Location X and night at Location Y.

• It is winter at Location X and summer at Location Y.

• There are more hours of daylight at Location X than at Location Y.

• The moon is brighter when viewed from Location X than when viewed from Location Y.

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS2-6

The diagram below shows four positions in Earth’s orbit around the sun. The Northern Hemisphere experiences the beginning of spring when Earth is in —

• Position 1

• Position 2

• Position 3

• Position 4

Tags

NGSS.MS-ESS1-1

Rift valleys can form when fractures in Earth’s crust widen. The valley walls slowly move at a rate of only a few millimeters a year. Which of these best describes the type of tectonic activity that forms rift valleys?

• Rift valleys form where a continental plate moves under an oceanic plate.

• Rift valleys form where a plate slides horizontally past another plate.

• Rift valleys form where two plates move away from each other.

• Rift valleys form where an oceanic plate moves under another oceanic plate.

Tags

NGSS.MS-ESS2-2

Scientists recently discovered that rocks collected from the Franklin Mountains in West Texas and rocks collected from mountains in eastern Antarctica were exactly the same age. Further research showed that the rocks were chemically and geologically the same and came from the same magma source. This discovery provides evidence of —

• coastal erosion

• plate tectonics

• ocean currents

• glacial melting

Tags

NGSS.MS-ESS2-3