Evidence of Chemical Change During chemistry class, students carried out 4 tests to determine if combining two substances would produce a chemical change. They used different substances in each test. Their results for each of the four tests are shown in the following table.

Which of the tests shows clear evidence that a chemical change took place?

Test
Substance A
Substance B
Temperature Change
Solid Produced?
Gas Produced?
Appearance of Results
1
Clear liquid
Orange solid
None
No
No
Orange liquid
2
Clear liquid
Clear solid
+12°C
No
No
Clear liquid
3
Clear liquid
White solid
None
No
Yes
Bubbling pink liquid
4
Clear liquid
Clear liquid
None
Yes
No
Blue solid in clear liquid

Directions: For each Test, decide if the test shows a physical change or a chemical change. Fill in the blank with either physical or chemical. Use evidence from the data table and the signs of a chemical change we learned about to explain your reasoning and complete the sentence.

Test 1:
This shows a change because

Test 2:
This shows a change because

Test 3:
This shows a change because

Test 4:
This shows a change because