C165 Integrated Physical Sciences Practice Questions - Set 3 - Part 1

Correct Answer: b) Air density decreases

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

Correct Answer: c) 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

The collision of tectonic plates at a convergent boundary can lead to earthquakes, volcanic eruptions, and mountain formation.

Correct Answer: Nitrogen

Nitrogen makes up about 78% of Earth's atmosphere, making it the most abundant gas.

Correct Answer: Igneous rock

Igneous rocks are formed from the cooling and solidification of lava or magma.

Correct Answer: Oxygen

Oxygen is not considered a greenhouse gas. Greenhouse gases trap heat in the atmosphere, whereas oxygen does not.

Correct Answer: Solar energy

Solar energy is a renewable resource, meaning it can be replenished naturally over time, unlike coal or natural gas.

Correct Answer: Both Earth's orbit and axial tilt

The Earth's seasons are caused by both its orbit around the Sun and the axial tilt of the planet, which changes the angle of sunlight.

Correct Answer: The Sun

The Sun is the primary source of energy for Earth, providing light and heat that sustain life and drive the planet's weather systems.

Correct Answer: Mars

Mars is often called the "Red Planet" due to its reddish appearance, which is caused by iron oxide (rust) on its surface.

Correct Answer: Skin

The skin is the largest organ in the human body, serving as a protective barrier and regulating temperature.

Correct Answer: Au

The chemical symbol for gold is Au, derived from the Latin word "aurum."

Correct Answer: Neon

Neon is a noble gas that is colorless, odorless, and inert at room temperature.

Correct Answer: H2O

The chemical formula for water is H2O, indicating two hydrogen atoms and one oxygen atom.