SCIENTIFIC METHOD PRACTICE

Directions: The following are steps from scientific experiments. Read each one and decide if the step is a QUESTION, HYPOTHESIS, EXPERIMENT OR CONCLUSION.

Does a baseball travel farther than a golfball if hit with the same amount of force?

Practice #1

QUESTION

PRACTICE ANSWER #1

PRACTICE #2

When the golfball and baseball were hit with the same amount of force, the golfball traveled 30 meters, while the baseball traveled 25 meters. The golfball traveled 5 meters farther than the baseball. Therefore the golfball will travel farther.

PRACTICE ANSWER #2

CONCLUSION

PRACTICE #3

Take ten baseballs and ten golfballs and hit each with 60 pounds of force. Measure how far each ball travels and record your data on a chart.

PRACTICE ANSWER #3

EXPERIMENT

PRACTICE #4

I think that if a baseball and golf ball are hit with the same force, the baseball will travel farther because it is heavier.

PRACTICE ANSWER #4

HYPOTHESIS

PRACTICE #5

IS IT POSSIBLE TO RAISE A SHIP FROM THE BOTTOM OF A LAKE USING PINGPONG BALLS?

PRACTICE ANSWER#5

QUESTION

PRACTICE #6

Take one thousand ping pong balls and pump them into the boat using air pressure. Observe the boat to see if it begins to rise. If not, continue pumping ping pong balls into the boat until it rises or cannot hold anymore balls.

PRACTICE ANSWER#6

EXPERIMENT

PRACTICE #7

CAN A PERSON BE LIFTED OFF THE GROUND BY HELIUM BALLOONS?

PRACTICE ANSWER#7

QUESTION

PRACTICE #8

I think that if you fill a boat with ping pong balls, you will be able to lift it off the bottom of a lake.

PRACTICE ANSWER #8

HYPOTHESIS

PRACTICE #9

After filling the boat with 5000 ping pong balls, the boat still did not float at all, therefore, ping pong balls cannot be used to raise a boat from the bottom of a lake.

PRACTICE ANSWER#9

CONCLUSION

PRACTICE #10

Fill helium balloons with helium and tie the strings of the balloons together to make a balloon bouquet. Select people with different masses and have them hold the balloons. Keep giving balloons to people until they either begin to float or cannot hold anymore.

PRACTICE ANSWER #10

EXPERIMENT

PRACTICE #11

We gave people of different masses as many helium balloons as they could hold and they all failed to be lifted off the ground, therefore, a person cannot be lifted off the ground by helium balloons.

PRACTICE ANSWER #11

CONCLUSION

PRACTICE #12

I think that helium balloons can lift someone off the ground if the person was really small, like a two year old, and you used about one hundred balloons tied together.

PRACTICE ANSWER#12

HYPOTHESIS