Question

1. you have two attempts and the average of the scores will be used if both attempts are done.

1 multiple choice 1 point
image of penguins on ice
if lakes were to freeze solid during the winter, the organisms in the lake would die. which of these characteristics of water helps prevent permanent freezing of lakes?
ice loses heat when it melts.
water freezes at 0 degrees celsius.
water becomes a solid in a freezer.
ice floats when it freezes

Explanation:

To determine which water characteristic prevents lakes from freezing solid, we analyze each option:

• "Ice loses heat when it melts": Melting ice absorbs heat, not loses, so this is incorrect.
• "Water freezes at 0 degrees Celsius": This is just the freezing point, not a reason for preventing solid freezing.
• "Water becomes a solid in a freezer": This is about freezing in a controlled environment, not relevant to lake freezing in winter.
• "Ice floats when it freezes": When water freezes into ice, it becomes less dense and floats on the surface. This layer of ice insulates the water below, preventing it from freezing solid and allowing organisms to survive.

Answer:

The correct option is "Ice floats when it freezes" (the last option among the given choices).