The hypothesis is what you think before you get your result so observations can influence your hypothesis
The answer is A. Sound can travel through matter (solids, liquids, and gases). Sound travels faster in solids, then slower in liquids and slowest in the air. When the person in the next room makes noise, the sound travels through the air in their room, through the solid wall and in the air in your room and into your ear.
Answer:
Hi
Explanation:
It separates the content of cell from their external environment.
It controls the entry and exit of materials in nd out of cell
People will have a harder time exchanging goods and services and many businesses will shut down as a result.
