Question

multiple choice 1 point
when water freezes it_
uses the same amount of space
takes up less space
takes up more space
the legends of frozen water are so diluted now, no one can really know what water does in the depths of cold

6 multiple choice 1 point
reefs are an important source of...
neither food nor income, just good vibes
not food, but income
not income, but food
both income and food

7 multiple choice 1 point
as water is heated_
the average speed of water molecules stays the same
the average speed of water molecules can never be tested because we dont have the technology to know
the average speed of water molecules increases (goes faster)
the average speed of water molecules decreases (goes slower)

Explanation:

1. When water freezes, its molecules arrange in a more open - lattice structure, causing it to expand and take up more space.
2. Reefs are important ecosystems that provide food sources such as fish and other marine organisms for humans and other animals, and also contribute to income through activities like tourism and fishing.
3. Heating water increases the kinetic energy of its molecules, which in turn increases their average speed.

Answer:

1. C. takes up more space
2. D. both income and food
3. C. the average speed of water molecules increases (goes faster)