Science 8 Final Exam

What is speed in a specific direction called?

• Acceleration

• Force

• Velocity

• Distance

What do waves carry?

• Water

• Energy

• Matter

• Particles

What is the unit of force in the metric system?

• Newton

• Joule

• Watt

• Meter

______ is the distance between one point of a wave to the same point in 

        the next wave.

• Amplitude

• Frequency

• Wavelength

• Crest

Which of the following best summarizes the definition and causes of global warming, along with its effects on climate change?

• Global warming is the gradual increase in Earth's temperature due to human-induced greenhouse gas emissions, leading to climate change.

• Global warming is a sudden climatic event unrelated to human activities, with no significant impact on climate change.

• Global warming is a myth that has no scientific basis and does not affect the climate.

• Global warming refers to the Earth's cyclical temperature variations that occur without any human influence.

EM waves ________ a medium.

• require

• don't require

• can have

• sometimes have

Calculate the kinetic energy of a truck that has a mass of 3000 kg moving down a hill at a velocity of 22 m/s.

• 726,000 J

• 700,000 J

• 750,000 J

• 720,000 J

Select the correct order of waves on the EMS 

• Radio, Micro, Infra, Visible, Ultra, X-ray, Gamma
• Gamma, X-ray, Ultra, Vis, Infra, Micro, Radio
• Vis, Micro, Infra, Ultra, X-ray, Gamma, Radio
• Micro, Radio, Vis, Infra, Ultra, X-ray, Gamma

Carbon is exchanged among Earth's spheres (biosphere, geosphere, hydrosphere, and atmosphere) through various processes including

• It is exchanged only through photosynthesis and respiration.

• It is exchanged through photosynthesis, respiration, decomposition, and sedimentation.

• It is exchanged only through geological processes.

• It is exchanged solely in the atmosphere.

The greenhouse effect is defined as the process by which certain gases trap heat in the Earth's atmosphere. Select the statement that correctly describes the greenhouse effect and its causes.

• It is a process where greenhouse gases in the atmosphere trap heat, with causes including both natural phenomena and human activities such as burning fossil fuels.

• It is a process where the Earth loses heat to space due to the absence of greenhouse gases.

• It describes the reflection of sunlight off the atmospheric layers with no role for human activities.

• It refers to the trapping of heat exclusively by water vapor with no contribution from other gases or human activities.