Midterm 1 Practice

Which subatomic particle(s) is/are responsible for most of the mass of an atom?

• the electrons only

• the protons and neutrons

• the protons only

• the protons and electrons

Tags

NGSS.HS-PS1-8

Which of the following graphs represents the functional relationship between the frequency of light and its corresponding wavelength?

• 
• 
• 
• 

Tags

NGSS.HS-PS4-1

Solve the following problem using your knowledge of scientific notation. [(6×10^−34)(3×10^8)]/(2×10^−18)

• 2×10^−8

• 1×10^−8

• 5×10^−9

• 9×10^−8

Which is true regarding percentage error?

• The percentage error is calculated by multiplying the approximation value and the exact value.

• The percentage error is calculated by dividing the absolute error by the exact value and multiplying by 100.

• The percentage error is a percentage that states how many mistakes were made during an experiment.

• The percentage error is a set of inferences made by human senses and scientific equipment.

In the metric system nanometers represent a measure of _______.

• Energy

• Distance

• Volume

• Mass

What is the correct order of decreasing frequency?

• Radio waves, visible light, ultraviolet radiation, infrared radiation

• Visible light, ultraviolet radiation, infrared radiation, radio waves

• Infrared radiation, radio waves, visible light, ultraviolet radiation

• Ultraviolet radiation, visible light, infrared radiation, radio waves

Tags

NGSS.HS-PS4-1

What is the frequency of yellow light with a wavelength of 600 nm?

• 2 x 10^-17 Hz

• 5 x 10^16 Hz

• 2 x 10^-15 Hz

• 5 x 10^14 Hz

Tags

NGSS.HS-PS4-1

X-rays are dangerous because _________.

• They cause the molecules inside cells to become very hot

• They are not dangerous as they pass straight through your body

• They are not dangerous because they are scattered off the surface of your skin

• They have high energy photons that excite core electrons in atoms.

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

Which of the following interactions of light and matter is incorrectly paired?

• The rotation of water molecules is excited by the microwave radiation

• The electron spin in atoms is excited by radio frequency radiation

• The vibration of molecules is excited by infrared radiation

• The valence electron in a hydrogen atom is excited by ultraviolet radiation

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-4

The work function of a silver surface is 4.73 eV. Two photons of 2.5 eV each hit the silver. What happens?

• A pit forms in the silver due to the impact

• One electron is released from the silver surface, with kinetic energy of about 0.47 eV

• Two electrons are released from the silver surface

• Nothing. The photons just bounce off the surface

Tags

NGSS.HS-PS4-3