Science 8 - Forms of Energy

Which of the following best explains why sound travels fastest in solids?

• Molecules in solids vibrate more intensely

• Solids have a higher temperature than liquids and gases

• Molecules in solids are closer together

• Sound waves can bend around solid objects more easily

A student observes that sound travels faster on a hot summer day compared to a cold winter day. What is the most likely explanation for this observation?

• Air pressure is higher in summer

• Molecules move more vigorously at higher temperatures

• Sound waves are longer in summer

• The air is less dense in summer

When white light passes through a prism, it disperses into different colors. What physical property of light causes this phenomenon?

• Reflection

• Refraction

• Diffraction

• Polarization

In the visible light spectrum, which color has the highest frequency?

• Red

• Green

• Blue

• Violet

A scientist is studying the behavior of light passing through different materials. Which of the following statements is true about the relationship between a light wave's energy, wavelength, and frequency?

• Energy is directly proportional to wavelength and inversely proportional to frequency

• Energy is inversely proportional to wavelength and directly proportional to frequency

• Energy is directly proportional to both wavelength and frequency

• Energy is inversely proportional to both wavelength and frequency

When white light passes through a prism, which color is bent the least?

• Red

• Green

• Blue

• Violet

How would you define heat in terms of molecular motion?

• The average speed of molecules in a substance

• The total kinetic energy of randomly moving atoms and molecules

• The potential energy stored in molecular bonds

• The difference in temperature between two objects

Which of the following best describes the relationship between heat and temperature?

• Heat is a measure of temperature change

• Temperature is the total amount of heat in a system

• Heat is thermal energy transfer due to temperature differences

• Temperature and heat are interchangeable terms

In an electrical circuit, what causes the flow of electrons?

• Resistance in the circuit

• The total voltage of the battery

• An imbalance in electrical charges

• The number of components in the circuit

How does the total voltage in a series circuit compare to that of its individual components?

• It is less than the voltage of any individual component

• It is equal to the voltage of any individual component

• It is the sum of the voltages of all components

• It is the average of the voltages of all components