Unit 1 Exam (3rd Block) Earth's Sphere, Cycles, & System

Front

What is density?

Back

Density is the mass of an object divided by its volume, typically expressed in grams per cubic centimeter (g/cm³) or grams per milliliter (g/mL).

Front

How do you calculate density?

Back

Density (D) can be calculated using the formula: D = mass (m) / volume (V).

Front

What is the density of a sphere with a mass of 50 g and a volume of 25 mL?

Back

Front

What is the primary energy source that drives the water cycle?

Back

The primary energy source that drives the water cycle is the Sun.

Front

What is the composition of Earth's mantle compared to the crust?

Back

The density of the Earth's mantle is greater than that of the crust.

Front

Why is rain considered fresh water?

Back

Rain is considered fresh water because when water evaporates from oceans, most of the salt remains in the oceans.

Front

What is the function of the ozone layer?

Back

The ozone layer blocks harmful ultraviolet (UV) rays from reaching the Earth's surface.

Front

What is salinity?

Back

Salinity is the concentration of salt in water, usually expressed as a percentage.

Front

What percentage of Earth's water is found in the oceans?

Back

About 97% of Earth's water is found in the oceans.

Front

What happens to salt when ocean water evaporates?

Back

When ocean water evaporates, most of the salt remains in the ocean, resulting in fresh water.