C165 Integrated Physical Sciences - Set 3 - Part 1

Correct Answer: Air density decreases

As altitude increases, air density decreases due to the reduced gravitational pull and less atmospheric pressure.

Correct Answer: Longitudinal wave

Sound is a longitudinal wave where particles of the medium vibrate parallel to the direction of the wave's travel.

Correct Answer: Charge separation within clouds

Lightning occurs due to the build-up and release of electrical charge in the atmosphere, typically within clouds during thunderstorms.

Correct Answer: Carbon dioxide

Carbon dioxide is released during volcanic eruptions and contributes to the greenhouse effect.

Correct Answer: Carbon dioxide

Carbon dioxide is the most abundant greenhouse gas produced by burning fossil fuels, contributing to global warming.

Correct Answer: Thermosphere

The thermosphere is the hottest layer of the atmosphere due to the absorption of high-energy solar radiation.

Correct Answer: Wind patterns

Ocean currents are primarily driven by wind patterns, which cause the surface waters to move.

Correct Answer: Covalent bond

A covalent bond forms when atoms share pairs of electrons to achieve a full outer electron shell.

Correct Answer: All of the above

Convergent boundaries result in earthquakes, volcanic eruptions, and mountain formation due to the intense pressure and collision of plates.

Correct Answer: Ultraviolet rays

Ultraviolet (UV) rays have high energy and can damage skin cells, leading to sunburns.

Correct Answer: Air resistance

Air resistance is a type of friction that opposes the motion of objects as they move through air.

Correct Answer: The speed decreases

In a denser medium, wave particles encounter more resistance, slowing down the speed of the wave.

Correct Answer: Mechanical wave

Mechanical waves, such as sound, require a medium (solid, liquid, or gas) to travel through, unlike electromagnetic waves.

Correct Answer: Second

The SI unit for time is the second (s), which is the standard unit of time measurement.

Correct Answer: Weight depends on mass and gravitational force

Weight is the force exerted by gravity on an object, which depends on both the object's mass and the local gravitational field strength.

Correct Answer: Earth’s rotation

The Coriolis effect is caused by the rotation of the Earth, which deflects the path of moving air and water to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.

Correct Answer: Red

Red light has the longest wavelength and the lowest energy among the visible light spectrum.

Correct Answer: Condensation

Condensation occurs when water vapor cools and changes into liquid water, typically forming clouds or dew.

Correct Answer: It opposes motion

Friction is a force that opposes the relative motion of objects in contact with each other, slowing them down.

Correct Answer: Kinetic energy

Kinetic energy is the energy an object has due to its motion, dependent on its mass and velocity.