Question

1. margot learned that sound waves travel at different speeds through different materials. she also learned that sound waves cannot travel through outer space at all. which best explains why sound waves cannot travel through space? space is too cold. gravity is too strong. space is a vacuum. energy from the sun is too powerful.

Explanation:

Sound waves need a medium (like air, water, or solids) to travel. Outer space is a vacuum, meaning it has no particles (or very few). Without particles to vibrate and carry the sound energy, sound waves can't propagate. The other options are incorrect: energy from the Sun (light/heat, not relevant to sound), gravity strength (unrelated to sound wave travel), and space being cold (temperature doesn't stop sound - medium presence/absence does).

Answer:

Space is a vacuum.