wcraig1998
28.12.2019 •
Biology
Which is most likely a physical change? cutting a substance into four pieces burning a substance into ash and smoke reacting a substance chemically to form a new substance combining a substance with water to make rust
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Ответ:
Option (a) is the correct answer.
Explanation:
A physical change is a change in which there occurs no change in chemical composition of a substance.
Whereas when chemical composition of a substance changes then it is called chemical change.
For example, cutting a substance into four pieces is a physical change as there occurs no change in chemical composition of the substance.
Ответ:
If there is 8 g of a substance before a physical change, how much will there be afterwards?
0 g
4 g
8 g
16 g
Explanation:
A
Ответ:
Freshwater is essential for our planet. Healthy freshwater environments supply water for drinking, growing crops, manufacturing, energy and transport. They also help to prevent erosion, dispose of waste and provide natural protection from flooding. and ways we can protect it is: Properly dispose of hazardous productsPut up signs. ...
Use and dispose of harmful materials properly. ...
Volunteer in your community. ...
Join in a beach, stream or wetland cleanup. ...
Prepare a presentation about your watershed for a school or civic organization. ...
Organize a storm drain stenciling project.
yes this is an example of a common good
Explanation: