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A student wants to make a change to the circuit shown below so that when Switch 1 is open and Switch 2 is closed, only one light will be on it the circuit.

Which diagram shows how the student should change the circuit?

• answer F

• Answer G

• Answer H

• Answer J

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

Students observe a glass of ice and water. The glass is dry on the outside. After ten minutes students see drops of water on the outside of the glass.

• The water vapor in the air changes to a liquid when it touches the cold glass

• The cold water inside the glass rises and then slides down the outside of the glass

• The ice in the glass melted and caused the water to overflow the glass

• the water moved to the outside surface through tiny holes in the glass.

Tags

NGSS.MS-PS1-4

A student uses a flashlight to shine a beam of light on three different objects.

Which table describes what happens to the light beam as it interacts with each object?

• Table F

• Table G

• Table H

• Table J

Tags

NGSS.MS-PS4-2

Students investigate force. The masses they use begin at rest on the ramp. The setup the students use is shown.

Which change will reduce the amount of force needed to move the masses?

• Decrease the height of the ramp

• increase the height of the ramp

• add an additional mass

• pull the spring scale with two hands

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which of the following best describes the role of decomposers in an ecosystem?

• They produce their own food through photosynthesis.

• They consume other organisms for energy.

• They break down dead organisms and waste, returning nutrients to the soil.

• They are the primary consumers of plants.

Tags

NGSS.MS-LS2-3

A student recorded the time it took for all the water in a puddle to evaporate after a rain. Which kind of energy causes water to evaporate?

• Light energy from streetlights

• sound energy from passing cars

• Thermal energy from the environment

• Mechanical energy from nearby streets

Tags

NGSS.MS-PS1-4

Earth continuously rotates on its axis while also moving in an orbit. About how much time does it take for Earth to make on complete rotation on its axis?

• 24 hours

• 30 days

• 60 minutes

• 365 days

For a class demonstration a student turned off the lights in the classroom. The student then shined light from a flashlight through a hole in a piece of cardboard. The class saw the narrow beam of light continue until another student placed a mirror in the light's path.

The light did not continue past the mirror because --

• light cannot travel very far

• the mirror absorbed all the light

• the light was refracted back to the light source

• light travels in a straight line and cannot go around objects.

Tags

NGSS.MS-PS4-2

Which conclusion can be made about the samples based on the table?

• sample 1 is made of plastic

• Sample 2 is made of metal

• sample 3 is attracted to magnets

• sample 4 is less dense than water

What force causes the wagon to stop?

• The force of gravity which is acting in the same direction as the arrow

• The force of friction which is acting in the same direction as the arrow

• The force of gravity which is acting in the opposite direction of the arrow

• The force of friction which acting in the opposite direction of the arrow

Tags

NGSS.MS-PS2-2