A student is investigating magnetic field strength using the model shown. What is the student most likely investigating?

• if the type of material placed between an object and a magnet affects the magnetic field's strength

• if the shape of a material placed between an object and a magnet affects the magnetic field's strength

• if the thickness of material placed between an object and a magnet affects the magnetic field's strength

• if the temperature of a material placed between an object and a magnet affects the magnetic field's strength

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A student finds a nail wrapped with wire in a box of science supplies. She remembers it can be used as a magnet. The nail does not attract any paper clips but the ends of the wires are not connected to any power source. Next, she finds a battery and connects the ends of the wires to the battery. Now the nail can attract fifty paperclips. Which statement describes the type of magnet she found?

• It is a bar magnet because it has a nail and wires.

• It is a bar magnet because it needs a power source.

• It is an electromagnet because it has a nail and wires.

• It is an electromagnet because it needs a power source.

Which of the following is a major difference between electromagnets and permanent magnets?

• Permanent magnets can be turned on and off, while electromagnets are always producing magnetic fields.

• Electromagnets can be turned on and off, while permanent magnets are always producing magnetic fields.

• Electromagnets are always stronger than permanent magnets.

• Permanent magnets are always larger than electromagnets.

The picture shows a seismograph during an earthquake. What question can scientists learn from this seismograph?

• How deep is the earthquake?

• How strong is the earthquake?

• How far away will the earthquake travel?

• How much damage will the earthquake cause?

Tags

NGSS.MS-ESS3-2

Kennedy wants to design a model to illustrate how earthquakes impact Earth's surface. She plans to rub two objects together to demonstrate the movement of the Earth's crust along a fault line. Which BEST explains the type of material Kennedy should use as a model to represent pieces of the Earth's crust in order to illustrate the impact of an earthquake?

• She should use pieces of chalk because they would allow her to see how the Earth's crust chips and cracks as it rubs against itself.

• She should use two smooth blocks of wood to determine how quickly the blocks would move in an earthquake.

• She should use blocks of potting soil because they would crumble easily allowing her to see how sediment is carried away by the vibrations and deposited in another location.

• She should use blocks of ice because they would slip past each other easily allowing her to simulate pieces of the Earth's cruct moving past each other.

Tags

NGSS.MS-ESS2-2

NGSS.MS-ETS1-1

The diagram shows an electric circuit that a student designs for a science competition. After finishing her design, the student reads the rules of the competition closely. She reads that the designs are limited to using only three parts. Which part can she remove from the design and still have a functional electric circuit?

• She can remove the wires because the energy can be transmitted through the air.

• She can remove the battery because the light bulb serves as the source of energy.

• She can remove the switch because the circuit can be completed by connecting the wires.

• She can remove the light bulb because the battery can provide evidence of the circuit working.

Tags

NGSS.MS-ETS1-2

Which answers make a correct statement? Choose 2 correct answers.

• Physical change only changes the size.

• Physical changes begin and end with the same matter.

• Physical change only changes the color.

• Physical changes change the matter into something totally different.

• Changes of state such as melting, evaporating, freezing, and condensating are all physical changes.

Some beneficial bacteria live inside the human digestive tract. How do these bacteria most help the body function?

• They help produce energy from food eaten.

• They help digest food in the intestines.

• They help neutralize toxins present in food.

• They help to liquefy food in the esophagus.

Tags

NGSS.MS-LS2-1

The picture shows a geographic information system (GIS) map. Which question is this map designed to ask?

• Where will faulting most likely occur?

• Where will flooding most likely occur?

• Where will a volcano most likely occur?

• Where will an earthquake most likely occur?

Tags

NGSS.MS-ESS2-4

Which picture shows a type of landform that can create islands from molten rock?

• 
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Tags

NGSS.MS-ESS2-2