Compare the motion of two fish. Which fish was moving at a higher speed?
a fish that moved 50kilometers in 10hours a fish that moved 85kilometers in 10hours
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 faster will go a farther distance in that time. It is moving at a higher speed.
Look at the distance each fish moved and the time it took to move that distance.
One fish moved 85 kilometers in 10 hours.
The other fish moved 50 kilometers in 10 hours.
Notice that each fish spent the same amount of time moving. The fish that moved 85 kilometers moved a farther distance in that time. So, that fish must have moved at a higher speed.