8th Grade Science Fall Final 2024-25

A student is assigned a test tube containing an unknown liquid for identification. After the lab, what is the correct way to dispose of the liquid?

• A.

  Pour directly down the sink.

• .

  Dilute with water, and then pour down the sink

• C.

  Pour into the waste container set out by the teacher.

• D.

  Throw the liquid in the trashcan.

A student drops a large glass beaker on the floor, where it breaks. What should the student do first?

• A.

  Tell the teacher about the broken glass.

• B.

  Tell other students not to use glass beakers.

• C.

  Use heavy gloves to pick up the broken glass.

• D.

  Sweep up the broken glass with a broom and dustpan.

In an investigation over force, mass, and acceleration, five different students lined up behind five different objects. Each student pushed their assigned object with the same amount of force as the other students. The distance traveled by each object is listed in the table below. Based on the data displayed in the table above, which of the following conclusions can be made concerning the objects involved in the investigation? Select TWO correct answers.

• A. Object 3 had the greatest mass.

• B. All of the objects were made of different material.

• C. Object 4 had the greatest mass.

• D. Object 4 had the least mass.

• E. Objects 1, 3, and 5 were made of different material than Objects 2 and 4.

Tags

NGSS.HS-PS2-1

A roller coaster containing four cars is accelerating at 15 m/s² before it comes to an abrupt stop at the end of the ride. The mass of one car is 200 kg. How much force was exerted on the roller coaster to bring it to a stop? (HINT: All 4 cars are stopping!)

• 60N

• 800N

• 3000N

• 12000N

Tags

NGSS.HS-PS2-1

A racecar accelerates at a rate of 19 m/s² each second. If the mass of the race car is 1600 kg, determine the net force acting on the car.

• 30,400 N

• 8,400 N

• 300 N

• 84 N

Tags

NGSS.HS-PS2-1

The following pictures show a space shuttle during launch and then in orbit. What is the main difference between the two pictures?

• A. Once in orbit, the space shuttle has escaped earth’s gravitational pull and no longer requires upward force from rockets.

• B. During launch, the rocket must contend with Newton’s Laws of motion, but once in orbit these laws no longer apply.

• C. The shuttle in orbit must utilize lighting systems now that they are in space and no longer receive sunlight.

• D. During launch the shuttle moves north, once in orbit it moves east or west.

Tags

NGSS.HS-PS2-1

When investigating car crashes with the use of crash test dummies, scientists found that all three of Newton's laws were present in an accident. Pick the TWO correct statements below:

• A. Newton's First Law: Use a seatbelt and a shoulder belt to keep the inertia of the person similar to the car.

• B. Newton's Second Law: if a car hits something of an equal mass, it's inertia will be very small.

• C. Newton's Third Law: Use seatbelts and an air bag because if the car hits a wall, the wall will push back with an equal and opposite force.

• D. Newton's First Law: when a car crashes into another car, they will absorb each other's energy.

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-3

Astronomers use different types of telescopes to observe different parts of the electromagnetic spectrum. This allows astronomers to study objects in space. Each type of electromagnetic wave can travel through space at the speed of light. Sometimes astronomers will use two telescopes on opposites sides of a planet and combine the image from each telescope. When combined, the two telescopes act like one giant telescope and have the ability to reveal important details from space.

If astronomers are detecting electromagnetic waves with a wavelength of 10-2, what type of wave are they detecting?

• A. Gamma Rays

• B. Ultraviolet

• C. Microwave

• D. Radio waves

Tags

NGSS.HS-PS4-1

The twin Keck Observatory telescopes (pictured) are able to detect electromagnetic waves with a wavelength of 10^-8 meters. Use the following electromagnetic spectrum to correctly determine the type of wave the telescopes detect?

• Visible light

• Microwave

• Ultraviolet

• X-Ray

Tags

NGSS.HS-PS4-1

The Very Large Array is a series of 27 radio telescopes that work together to capture radio waves. The entire array can be arranged to have a diameter of over 22 miles. Why are radio telescopes so large?

• Only objects very far from Earth emit radio waves.

• Radio waves have very large wavelengths.

• Only very large stellar objects emit radio waves.

• Radio telescopes are monitored by computer and controlled remotely.

Tags

NGSS.HS-PS4-5