Systems are classified as human-made or natural. Match each example to the correct type of system. solar system
telephone system
plant root system
human digestive system
city transit system
water purification system
Natural System
Human-Made System
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Explanation:

Natural System:

1. solar system

2. plant root system

3. human digestive system

Human-Made System:

1. telephone system

2. city transit system

3. water purification system

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

what does the table look like