SINKING CHANGE

MATERIALS

• Different types of change
• Water
• Bowl
• Timer

Independent variable- amount of water
Dependent variable- different types of change.

All coins will be dropped into 10 inches of water from 2 inches before the surface of the water, and the clock will be stopped when the coin hits the bottom of the cup.

We predicted that the bigger the size of the coin, the faster it would hit the bottom of the cup. Therefore, the quarter would go through the water the fastest, then the nickel, then penny, then dime.

The masses of the coins:
Quarter: 5.67 grams
Nickel: 5.02 grams
Dime: 2.27 grams
Penny: 2.5 grams

After doing the experiment, we found the following times of the coins going through the water:
Quarter: .37 seconds
Nickel: .44 seconds
Penny: .51 seconds
Dime: .52 seconds

Untitled Slide

The equation for our data is:
y= .063375x +.725444
From this lab we've found that size does not matter when something is going through water, but the mass is what matters.