Review Questions 2B 1-7 (Earth Science)

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Name the force responsible for the following: A landslide.

Shear or Gravity.

Name the force responsible for the following: A rope holding up a cave explorer

Tension

What force acts against gravity to keep you from sinking into solid ground when you stand?

The force of the solid ground against your feet keeps you from sinking into the ground.

What are the two types of forces? How are they different?

The two types of forces are contact and field forces. Contact forces are exerted only between objects that touch. Field forces can be exerted on objects that are separated by distance.

(True or False) Your feet exert a compressive force on the ground where you stand.

True

What is a force? In what two ways can a force relate to an object?

A force is a push or a pull. An object may exert a force, and a force may be exerted on the object. Both always occur at the same time.

Name the force responsible for the following: Increasing pressure as you go deeper into the ocean.

Compression.

Name the force responsible for the following: Lightning

Electrical energy.

Name the force responsible for the following: Sand wearing away rock as water flows over the rock.

Friction.

Which force is most significant for earth scientists?

Gravity is the most significant force for earth scientists.

Name the force responsible for the following: A chunk of a glacier falling into the ocean to form an iceberg.

Gravity.

What is true about the forces acting on a rock sitting on the ground?

In general, if the rock is sitting on the ground, then it is not accelerating, which means that all forces acting on it are balanced. There is no net force.


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