3 years ago

What does it mean when to say that mass is coserved during a physical change?

1 answer:

4 0

During a physical change, the mass is conserved because it isn't permanently changed, like a chemical change. A chemical change would be something like burning a piece of paper, and a physical change would be something like cutting up pieces of paper (can be put back together).

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Which of these sentences is an opinion a light pollution is an overuse of artificial light and can create negative ecological co

Gala2k [10]

Answer:

When it seemed a truly dark sky at night is one of the most magical experiences one can have.

Explanation:

an opinion is what someone thinks is true but someone else might thing a different way. In this case, the speaker thinks tha a truly dark sky at night is one of the most magical experiances someone can have. someone else might contradict this opinion by saying that its not a magical experiance. The first sentance isn't an opinion because it states that light pollution is an overuse of artificial light and it can cause bad consequences. this is a fact because it's true. The last sentance is a fact because it states something that is happening in the world as well.

I hope this helps you!

6 0

2 years ago

Keisha is making a diagram of a simple machine in the body.

NemiM [27]

Answer:

The answer is X: Load, Y: Fulcrum, Z: Lever

Explanation:

I've taken this question before!

Hope this helps! :D

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