Semester 1 Review

Front

What determines the life cycles of stars?

Back

The life cycles of stars are determined by their mass (size).

Front

What is the phenomenon that allows a water bug to walk on water?

Back

The ability of a water bug to walk on water is an example of surface tension and cohesion.

Front

True or False: Waves with a greater amplitude have less energy than waves with a lower amplitude.

Back

False.

Front

What is the pH status of pure water?

Back

Pure water is neutral.

Front

Which characteristic is NOT used to classify stars?

Back

Shape is NOT a characteristic used to classify stars.

Front

Define mass in the context of stars.

Back

Mass refers to the amount of matter in a star, which influences its life cycle and evolution.

Front

What is surface tension?

Back

Surface tension is the cohesive force between liquid molecules at the surface, allowing objects to float.

Front

Explain cohesion in terms of water molecules.

Back

Cohesion is the attraction between water molecules, which helps maintain the structure of water.

Front

What is amplitude in wave physics?

Back

Amplitude is the maximum extent of a wave's displacement from its rest position, related to its energy.

Front

What does it mean for a substance to be neutral?

Back

A neutral substance has a pH of 7, indicating it is neither acidic nor basic.