8th Science Final (Previously Tested Topics - May '25)

What can happen to light when it shines on an object?

Answer explanation

When light shines on an object, it can be reflected, absorbed, or transmitted through the object.

Tags

NGSS.MS-PS4-2

Humans see different colors because our eyes are responding to light that is different in its __________.

The diagram shows the relative positions of a light source, apple, paper, and person. The person can’t see the apple. Which of the following correctly describes the light interactions taking place in the diagram?

• Light is reflected off the apple, but absorbed by the light source.

• Light is transmitted through the paper and then reflected off the apple.

• Light is absorbed by, not transmitted through the paper.

• Light from the light source is reflected only off the apple.

Tags

NGSS.MS-PS4-2

What are some advantages that analog signals have over digital signals, and what are the advantages of using digital signals?

Answer explanation

Analog signals have the potential for an infinite amount of signal resolution, & the signals have a higher density than digital signals. Analog signals are also easier to process than digital signals. Digital signals are able to carry more information than analog signals, which result in a more efficient use of frequencies and allow for a higher definition of images.

Tags

NGSS.MS-PS4-3

The characteristics of several different kinds of information technology are presented in the table. Which of the devices described above is an example of one that uses digital technology?

• Record album

• Clock

• Cell phone

• Thermometer

Tags

NGSS.MS-PS4-3

During ​ (a)   eclipses, the Moon passes between the Earth and the Sun; during ​ (b)   eclipses, the Earth passes between the Moon and the Sun.

• solar
• lunar

Tags

NGSS.MS-ESS1-1

Students use the materials pictured below to create a model of the lunar cycle. What action must the students perform to demonstrate what causes the changing appearance of the Moon from Earth?

Answer explanation

To demonstrate what causes the changing appearance of the Moon from Earth, students must move the tennis ball (modeling the Moon) around the basketball (modeling Earth) to model the Moon’s orbit around Earth. The flashlight (modeling the Sun) should stay still and remain pointing toward the basketball.

Tags

NGSS.MS-ESS1-1

Which of the following is primarily responsible for the changing of seasons on Earth?

• Orbit of Earth around the Sun and rotation of the Sun

• Tilt of the axis of Earth and the orbit of Earth around the Sun

• Orbit of Earth around the Sun and the rotation of Earth

• Rotation of Earth and rotation of the Sun

Tags

NGSS.MS-ESS1-1

Describe the role of gravity in the solar system and in the Milky Way galaxy.

Answer explanation

Gravity is the force that holds together the solar system and the Milky Way galaxy. It controls the orbits of planets and other objects within the solar system.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Which of the following best describes the formation of the solar system?

• A rotating disk of gas and dust was drawn together by the force of gravity.

• Several stars of different masses cooled and formed the planets and the Sun.

• The Sun ejected rocky material which formed the planets due to magnetic attraction forces.

• One very large planetary body broke apart into several smaller planets.

Tags

NGSS.MS-ESS1-2