The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the corresponding bones in whales have v

1. Independent Variable – This is the element changed or controlled in an experiment. Here, it is the labs, since they are given to one class but not the other.

2. Dependent Variable – This represents what is measured in the experiment and depends on the independent variable. In this case, it is the average test scores.

3. Hypothesis – A testable prediction. Here, it suggests that the class participating in labs will perform better than the one without labs.

4. Control Group – The group that does not receive the experiment variable; in this example, the class without labs.

5. Experimental Group – The group exposed to the variable being tested, here the class that completes labs.

6. Constants – The same quantity and type of notes and homework provided to both classes.

7. Possible threats to accuracy – Potential issues include improper application of independent or dependent variables, or misuse of statistical analysis, among others.

Hello!

Kinetic Energy (1/2 · mass · velocity²) arises when an object is moving, or when a force acts on it. For example, a moving car demonstrates this principle.

Potential energy (mass · height · gravity) exists when an object has the capacity to perform work. An example would be an item resting on a shelf. It possesses the potential to fall, converting its potential energy into kinetic energy.

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By examining the examples from the table, we categorize them as follows:

Girl swimming laps- Kinetic energy as the girl is in motion.

Boy standing on diving board - Potential energy since the boy is still but has the potential to move.

Girl striking volleyball - Kinetic energy as the volleyball is actively moving.

Boy grasping volleyball- Potential energy since the volleyball is at rest and can potentially be set in motion.

Thus, the accurate classification is table 1.