What is a physical change and a chemical change

A physical change --> is the change in appearance or form Example --> ice melting.

A chemical change --> is the change in chemical composition. Example --> rust

Additionally, physical changes can be reversible (water melting or freezing), while chemical changes can't. Rust cannot be reversed.

your picture is not part of the scientific method.

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

hope this : )