C165 Integrated Physical Sciences - Set 2 - Part 2

Correct Answer: Wavelength

Wavelength is the distance between two consecutive crests or troughs of a wave.

Correct Answer: Stratosphere

The stratosphere contains the ozone layer, which absorbs and protects Earth from harmful ultraviolet radiation.

Correct Answer: Elasticity

Elasticity refers to a material's ability to bounce back to its original shape after being disturbed.

Correct Answer: Two equal and opposite forces acting on different objects

According to Newtons Third Law, for every action there is an equal and opposite reaction, which forms an action-reaction force pair.

Correct Answer: Rust forming on iron

Rust formation is a chemical change because it involves the reaction of iron with oxygen to form a new substance, iron oxide.

Correct Answer: Melting ice

Melting is a physical change because it changes the state of matter without altering the chemical composition.

Correct Answer: Mesosphere

The mesosphere is the layer where meteoroids burn up due to friction with the atmosphere.

Correct Answer: It decreases

As water evaporates, it changes from a liquid to a gas, reducing the volume of liquid water.

Correct Answer: To absorb harmful ultraviolet radiation

The ozone layer absorbs most of the harmful ultraviolet radiation from the sun, protecting life on Earth.

Correct Answer: Positive

Protons have a positive electric charge, which contributes to the overall charge of an atom.

Correct Answer: Convection

Convection is the transfer of heat by the movement of fluids such as air or water.

Correct Answer: Condensation

Condensation is the phase change in which gas becomes a liquid, usually as it cools.

Correct Answer: Troposphere

The troposphere is the lowest layer of Earth's atmosphere and is where most weather events occur.

Correct Answer: Chemical potential energy

Chemical potential energy is stored in the bonds between atoms and molecules in a substance.

Correct Answer: Gravity

Gravity is the force that attracts objects with mass toward one another, such as planets and objects on Earth.

Correct Answer: Violet

Violet light has the shortest wavelength and the highest energy in the visible light spectrum.

Correct Answer: Water vapor

Water vapor is the most abundant gas emitted during volcanic eruptions.

Correct Answer: The temperature remains constant

During a phase change, the temperature of a substance remains constant as energy is used to change the state of matter.

Correct Answer: Differences in air pressure

Winds are caused by differences in air pressure, which result from the uneven heating of Earth's surface.

Correct Answer: Drag

Drag is the force exerted by a fluid, such as air or water, that opposes the motion of an object moving through it.