Science Quick Check. 1 correct answer per question.

Question

1. A student drops a basketball into a pool from a height of 5 meters while a friend records the approximate splash height. They want to make a bigger splash in their next trial. How can they achieve this?
a. They can drop the same ball with less speed.
b. They can use a ball with the same diameter but more mass.
c. They can use a ball with the same diameter but less mass.
d. They can drop the same ball from a lower height.

2. Which characteristic will be affected by increasing the speed of an object from 30 meters per second ( ms )
to 40 meters per second( ms )
a. weight
b. kinetic energy
c. mass
d. gravitational attraction

3. A student drops a 350-gram rock and a 500-gram rock into a pool from a height of 8 meters. Which statement about the investigation is accurate?
a. The 500-gram rock causes a smaller splash because it has more mass.
b. The 350-gram rock causes a smaller splash because it has more kinetic energy.
c. The 350-gram rock causes a larger splash because it has less mass.
d. The 500-gram rock causes a larger splash because it has more kinetic energy.

4. Use the table of information from a student's investigation to answer the question.

Object Splash Size Ranking
W 2
X 4
Y 1
Z 3
A student drops several objects of the same size into a bucket of water from a height of 2 meters. She ranks the splash size from 1-4, with 1 being the smallest splash and 4 being the largest splash. Which object most likely has the greatest mass?
a. w
b. z
c. y
d. x

Answer 1

Here are the correct answers to each question:

1. b. They can use a ball with the same diameter but more mass. (Increasing the mass of the ball will increase the energy upon impact, leading to a larger splash.)

2. b. kinetic energy. (Kinetic energy increases with the square of the speed, so increasing the speed from 30 m/s to 40 m/s will affect kinetic energy.)

3. d. The 500-gram rock causes a larger splash because it has more kinetic energy. (More mass at the same height results in greater kinetic energy, leading to a larger splash.)

4. a. w (In the ranking, object W has a ranking of 2, which, when looking at the relationships, suggests it has a larger mass, leading to a bigger splash than the others ranked lower.)

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