A Hole Is Drilled to the Center of the Earth

question 24

Multiple Choice

A hole is drilled to the center of the earth and a ball is dropped into it. When the ball is at the earth's center, compared with their respective values at the earth's surface,

• A) its mass and weight are the same.
• B) its mass and weight are both 0.
• C) its mass is the same and its weight is 0.
• D) its weight is the same and its mass is 0.

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Definitions:

Parkinson Disease

A progressive neurological disorder characterized by motor symptoms such as tremors, stiffness, and slow movements, due to dopamine-producing neuron decline.

Transplanting Brain Tissue

A medical procedure involving the transplantation of healthy brain cells or tissues to repair or replace damaged areas in the brain.

Cortex

The outer layer of the cerebrum, involved in higher brain functions such as thought and action.

Parkinson Disease

A progressive neurological disorder marked by tremor, muscular rigidity, and slow, imprecise movement, chiefly affecting middle-aged and elderly people.