Mid Term Practice Test 1

What is a scientific model?

• A representation of an object but smaller
• An exact representation made of similar material
• A representation of an object or system
• A familiar copy of an object

What is the best definition of the term "theory," as it is used in science?

• A guess about something that has occurred in nature.
• a comprehensive set of ideas explaining a phenomenon in nature.
• based on verifiable laws and can be proven true.
• a hypothesis that uses laws and observation to make an assumption.

Which statement correctly identifies the difference between laws and theories?

• Laws are a statement of fact, while theories are a statement of opinion.
• Laws explain why phenomena exist, while theories explain how.
• Laws are a prediction of phenomena, while theories are an explanation.
• Laws describe phenomena, while theories explain why phenomena exist.

Electromagnetic waves with the shortest wavelengths and the highest frequencies.

• Gamma rays
• radio waves
• infrared
• visible light

Tags

NGSS.HS-PS4-1

Where can electromagnetic waves travel?

• empty space or matter
• matter only
• empty space only
• Outer Space

Tags

NGSS.MS-PS4-2

The color light that has the lowest energy, lowest frequency, and longest wavelength is

• Orange
• Blue
• Green
• Red

In the longitudinal wave the areas of high density represent

• compressions
• rarefactions
• wavelength
• amplitude

Through which medium does sound travel fastest?

• solids
• liquids
• gas

Occurs when waves bounce off of a surface back towards its source

• refraction
• reflection
• diffraction

Tags

NGSS.MS-PS4-2

X-rays have a high frequency and can pass through skin and muscle, but not bones.

• True
• False

Tags

NGSS.MS-PS4-2