FOSS Energy i-Check 1

A group of students in another class needs your help. They want to design a switch to control a circuit that runs a motor. The materials that were available were a thin sheet of copper, brass fasteners, and a paper clip. They used the materials as you see in the diagram. When they put the switch into the circuit with the D-cell and motor, the motor spun all the time. No matter what position the switch was in, open or closed, the motor kept spinning. What do you think the problem is with the switch?

• This switch will always be on as metal is a conductor

• The switch needs to have metal in order for the energy to move

• There is no problem with the switch

Tags

NGSS.MS-PS2-5

All the bulbs are the same brightness, so any bulb will be fine.

• Y
• N

Incandescent bulbs last only 1,200 hours, so you will end up spending more money over the years.

• Y
• N

Tags

NGSS.MS-ETS1-1

NGSS.MS-ESS3-4

LED bulbs cost more, but you will still save money over the years compared to the other kinds of bulbs.

• Y
• N

Tags

NGSS.MS-ETS1-2

CFL bulbs cost less than LEDs, so you will save money if you buy them.

• Y
• N

Tags

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

One of the people who works in the city office says, “There is one more thing you should think about. Some lightbulbs get hotter than others. In the summer, hot bulbs make our office even warmer.” Which plan would be the best fair test to find out how room temperature is affected by the different kinds of bulbs? (Mark the one best answer.)

• Put a different kind of bulb in three lamps in the same room and check the air temperature.

• Put a lamp with an LED bulb in a small room, a lamp with a CFL bulb in a medium-sized room, and an incandescent bulb in a large room. Check the air temperature in each room after an hour.

• Put bulbs in three lamps, a different kind of bulb in each lamp. Place the lamps in three rooms the same size and measure the temperature each hour of the work day.

• Check the air temperature of rooms with different kinds of bulbs at different times of day.

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Students in a fourth grade class took turns presenting drawings to show the class their designs for circuits that would light a bulb and run a motor at the same time. One student showed the class this drawing. Evaluate the drawing and explain why the student has or has not met the design criteria.

• This circuit is a complete pathway

• This circuit is not a complete pathway

• There is nothing wrong with this circuit

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

Next week’s temperature is predicted to be hot. You find an old fan in the garage and want to find out if it still works. Which actions would provide evidence that the fan is still working? Write Y (yes) next to each action that provides evidence that the fan is working. Write N (no) next to each action that does not provide evidence.

Four students presented their models showing how electricity flows through a circuit. Which picture and description best explains why the motor runs? (Mark the one best answer.)

• A. Electricity flows from the negative terminal of the D-cell to the motor and then to the positive terminal of the D-cell.

• B. Electricity flows from the motor to both terminals of the D-cell.

• C. Electricity flows from both terminals of the D-cell to the motor.

• D. Electricity flows from the positive terminal of the D-cell to the motor and then to the negative terminal of the D-cell.

Tags

NGSS.MS-PS3-5

A student wants to complete this circuit so the motor will run. She has only a few materials available. What can she use to close the circuit between the D-cell and the switch? (Mark the one best answer.)

• A piece of string

• Aluminum foil

• Plastic straws

• Wooden craft sticks