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Gekata [30.6K]
2 years ago
7

Sarah heated some orange coloured crystals in a test tube. The crystals turned green and fizzed. After the fizzing stopped, the

test tube was allowed to cool. A green powder was left in the tube. Determine whether a chemical or a physical reaction has occurred. Identify two observations that support your decision.
Chemistry
1 answer:
Anni [7]2 years ago
6 0
A chemical change has occurred.
This is indicated by a colour change occurring (from orange to green) as well as a gas being given off (seen as the fizzing). If the fizzing made a small amount of noise, it also indicates that sound energy is given off, which is another indication that a chemical reaction has occurred.
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inysia [295]

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Sever21 [200]

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B,D

Explanation:

In December, a city in the Southern Hemisphere has warm weather all month long.

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The city experiences fewer hours of daylight.

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6 0
3 years ago
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2.A

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3 0
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Answer:

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8 0
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