Type answers here:
1. Physical Change
2. Physical Change
3. Chemical Change - Forcing a pure substance into a smaller space is physical. You can always let it out again. In fact EMTs do just that when they put the oxygen mask on patients.
4. Chemical Change
5. Chemical Change
Type answers here:
1.physical
2.physical
3.physical
4.chemical
4.chemical
11/13/09
Follow the instructions on this page:
Type answers here:
1. Physical Change
2. Physical Change
3. Chemical Change - Forcing a pure substance into a smaller space is physical. You can always let it out again. In fact EMTs do just that when they put the oxygen mask on patients.
4. Chemical Change
5. Chemical Change
Type answers here:
1.physical
2.physical
3.physical
4.chemical
4.chemical