ACAP 8th SCIENCE PREP : EWIT

This graph represents a sound wave. What is the frequency of this wave?

• 0.5 wavelength per second
• 1.0 wavelength per second
• 2.0 wavelengths per second
• 5.0 wavelengths per second

Tags

NGSS.MS-PS4-1

Hope drew a diagram to model a light wave being reflected when it meets a brick, as shown. The teacher asked Hope to redraw the diagram in order to model some of the energy in the light wave being absorbed by the brick. Which diagram best represents some of the energy in the light wave being absorbed by the brick?

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Tags

NGSS.MS-PS4-2

During an investigation, a teacher places a small permanent magnet with a hole in it onto a wooden rod. The magnet can slide freely up and down the rod. When the teacher places the magnet and rod on a tabletop above an electromagnet, the magnet slides up the rod as shown in the diagram. A student measures how far the magnet slides up the rod each time the teacher adds an additional battery to the electromagnet. Which question could most likely be answered by this investigation?

• How does the size of the magnet affect the distance the magnet travels up the rod?
• How does the distance between the magnet and the electromagnet affect the strength of the magnetic force of the electromagnet?
• How does the amount of the electric current affect the distance the magnet travels up the rod?
• How does the direction of the electric current affect the strength of the magnetic force of the electromagnet?

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-3

Ben wants to test whether the material used to make a disposable cup affects the amount of thermal energy transferred to a person’s hand. He investigates by carefully pouring the same volume of 90°C water into a foam cup and into a paper cup. Which additional step in the investigation will help Ben determine which material reduces thermal energy (heat) transfer to the hand of a person holding the cup?

• Measure the outside surface temperature of each cup after 10 minutes.
• Stir the water in each cup for 10 minutes before measuring its temperature.
• Vary the amount of water held by each cup before measuring its temperature.
• Measure the outside surface temperature of each cup after placing each on a different surface.

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Tyrone gathers amplitude and energy data for four ocean waves, as shown in the table. Which equation best represents the relationship between the amplitude (A) of an ocean wave and its energy (E), according to the data in the table?

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Tags

NGSS.MS-PS4-1

The diagram below shows an electromagnetic spectrum. Based on the information shown, which statement is not true?

• Ultraviolet waves occur at a higher frequency than Infrared waves.
• Gamma Rays have the shortest wavelength of all wave types.
• Ultraviolet waves have a longer wavelength than visible light.
• Visible light waves carry more energy than microwaves.

Tags

NGSS.MS-PS4-1

This diagram models a sound wave from a car horn hitting a wall. According to the model, which statement best describes what happens to the sound energy when the sound wave hits the wall?

• Ten percent of the sound energy is absorbed by the wall.
• Thirty percent of the sound energy is absorbed by the wall.
• Eighty percent of the sound energy is reflected by the wall.
• Eighty percent of the sound energy passes through the wall.

Tags

NGSS.MS-PS4-2

A student created an electromagnet out of a piece of copper wire, a nail, and a battery, as shown. The student observed that the electromagnet could not lift paper clips off a desktop as expected. Which hypothesis will most likely help the student build an electromagnet capable of lifting paper clips?

• Using a wooden stick instead of a nail will increase the number of paper clips that the electromagnet can pick up.
• Adding more coils of copper wire to the nail will increase the number of paper clips that the electromagnet can pick up.
• Pushing the coils of copper wire closer together will increase the number of paper clips that the electromagnet can pick up.
• Using a battery that produces less electric current will increase the number of paper clips that the electromagnet can pick up.

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

This graph represents sound waves generated by a vibrating string at two energy levels. Which statement best describes the difference in energy between Wave X and Wave Y?

• The energy of Wave Y is 4 times less than the energy of Wave X.
• The energy of Wave Y is 4 times greater than the energy of Wave X.
• The energy of Wave Y is 16 times less than the energy of Wave X.
• The energy of Wave Y is 16 times greater than the energy of Wave X.

Tags

NGSS.MS-PS4-1

A group of students is using resistors to investigate energy changes in electrical circuits. The group builds an electrical circuit using batteries, a switch, and a 10-ohm resistor. A schematic of their circuit is shown. Which claim is supported by both scientific reasoning and evidence obtained in this investigation?

• When the thermal energy of an object changes, energy has been created or destroyed.
• When the kinetic energy of an object changes, energy is transferred to or from the object.
• When the electrical energy of an object changes, energy has been created or destroyed.
• When the potential energy of an object changes, energy is transferred to or from the object.

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

NGSS.MS-PS3-5