You Throw a Ball Up in the Air and Hold

question 1

Multiple Choice

You throw a ball up in the air and hold your hand under it to catch it when it comes down. The reason why the ball stops is because

• A) your hand is there: your hand exerts no force on the ball.
• B) your hand exerts a force on the ball perpendicular to its velocity.
• C) your hand exerts a force on the ball in the direction of its velocity.
• D) your hand exerts a force on the ball in the direction opposite to its velocity.
• E) your hand and the ball exert forces in the same direction on each other.

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Definitions:

Evolutionary Faunas

Groups of animals that share a common evolutionary history and are identified in the fossil record over large geographical areas and timelines.

Sepkoski

Refers to Jack Sepkoski, a paleontologist known for his work on the biodiversity and extinction events of marine animal families through geologic time.

Arthropods

Arthropods are a phylum of invertebrate animals with exoskeletons, segmented bodies, and jointed limbs, including insects, arachnids, and crustaceans.

Synapomorphies

Shared derived characters or traits that are used to determine evolutionary relationships among organisms.