Compare the motion of two fish. Which fish was moving at a lower speed?
a fish that moved 20kilometers in 5hours a fish that moved 25kilometers in 5hours
An object's speed tells you how fast the object is moving. Speed depends on both distance and time.
Distance tells you how far the object has moved. One unit used to measure distance is the kilometer.
Time tells you how long the object has spent moving. One unit used to measure time is the hour.
Think about two objects moving for the same amount of time. The object that is moving slower will go a shorter distance in that time. It is moving at a lower speed.
Look at the distance each fish moved and the time it took to move that distance.
One fish moved 20 kilometers in 5 hours.
The other fish moved 25 kilometers in 5 hours.
Notice that each fish spent the same amount of time moving. The fish that moved 20 kilometers moved a shorter distance in that time. So, that fish must have moved at a lower speed.