8th Science GMAS Prep 2

A students wants to investigate how to apply an electric charge to a conducting metal sphere by using an electrically charged rod made of insulating material. Pith is a light material that easily picks up an electrical charge. The student will then show that the charge remains on the sphere after the charged rod is removed by holding a neutral pith ball hanging from a string near the sphere and observing its behavior.

Choose the circle that could be placed on the conducting metal sphere that shows how electric charge will be distributed on the metal sphere after the positively charged rod is touched to the sphere and then removed.

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Tags

NGSS.MS-PS2-3

A students wants to investigate how to apply an electric charge to a conducting metal sphere by using an electrically charged rod made of insulating material. Pith is a light material that easily picks up an electrical charge. The student will then show that the charge remains on the sphere after the charged rod is removed by holding a neutral pith ball hanging from a string near the sphere and observing its behavior.

Choose the image of the pith ball hanging from a string that should be placed in the box labeled, "testing whether sphere is charged," because it is showing how the pith ball and string will behave if the charge remains on the sphere.

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Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

A student reads that a number of electrical devices utilize electromagnets. Some of these devices require strong magnetic fields. The student decides to investigate how to increase the strength of a basic electromagnet.

How can the student test whether the magnetic field produced by an electromagnet is increasing in strength?

• A stronger magnet will require less wire for the coils.

• A stronger magnet will have more widely spaced coils.

• A stronger magnet will have a reduced measurable current.

• A stronger magnet will attract a greater number of metallic items

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

The model shows how light waves are transmitted through a transparent substance.

How would the model be different for a sound wave that is being transmitted through the same substance?

• The wavy arrows representing sound waves would have a smaller wavelength.

• The wavy arrows representing sound waves would go in the opposite direction.

• The atoms in the model would move parallel to the direction of the incoming wave.

• The atoms in the model would move perpendicular to the direction of the incoming wave

Tags

NGSS.MS-PS4-2

The diagram shows three types of electromagnetic radiation and their range of frequencies.

Which explanation correctly uses the data in the diagram to show how infrared radiation and ultraviolet radiation are related in terms of energy?

• Ultraviolet radiation has less energy than infrared radiation because energy is inversely proportional to frequency and the frequency of ultraviolet radiation is higher.

• Ultraviolet radiation has more energy than infrared radiation because energy is inversely proportional to frequency and the frequency of ultraviolet radiation is lower.

• Ultraviolet radiation has less energy than infrared radiation because energy is proportional to frequency and the frequency of ultraviolet radiation is lower.

• Ultraviolet radiation has more energy than infrared radiation because energy is proportional to frequency and the frequency of ultraviolet radiation is higher.

Tags

NGSS.MS-PS4-1

A student drew the diagram shown to model an electromagnetic wave from the sun.

Scientists have shown that ultraviolet light from the sun that has a wavelength of 315 to 400 nanometers can damage the retina.

Use the drop-down menus to create the BEST question for the student to ask to determine whether the elctromagnetic wave modeled will cause damage to the retina.

What is the ​ (a)   distance between point ​ (b)   on the model?

• horizontal
• W and point Z
• vertical
• Y and point Z
• X and point Y
• W and point Y

Tags

NGSS.MS-PS4-1

The densities of four different materials at the same temperature are shown in the table.

Based on the densities shown in the table, in which material will a sound wave MOST LIKELY travel at the GREATEST speed?

• Material W

• Material X

• Material Y

• Material Z

Tags

NGSS.MS-PS3-1

NGSS.MS-PS4-1

NGSS.MS-PS4-2

A student questioned how the properties of different materials affect the speed of sound waves traveling through them. The student found the following data in a chemistry handbook for the speed of sound in gases, liquids, and solids.

The student analyzed the data to make predictions about the speed of sound on materials with various densities and states of matter. Which TWO predictions can be made based on the data shown in the table?

• The speed of sound generally increases as it moves from gases to liquids to solids. .

• The speed of sound generally increases as it moves from liquids to gases to solids.

• As the density of solids and gases increases, the speed of sound generally decreases

• As the density of liquids and solids increases, the speed of sound generally increases.

• As the density of gases and liquids increases, the speed of sound generally decreases.

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

A student is modeling the image that will be produced by a double concave lens as shown.

Move the X into the box that shows the location of the image that will be produced.

d

c

b

a

--

X

---

-

A student is modeling the image that will be produced by a double concave lens as shown.

Move the correct words into the table to describe the image.

g

f

c

Larger Size

Upright

Inverted

Real

Virtual

Same Size

Smaller Size