Ch 1 Earth's Structure

Scientists see the shape of Earth in pictures taken by

• smartphones

• satellites

• explorers

These pictures show that Earth is not quite a perfect ,

which has all points on the surface at an equal distance from the center.

• flat

• mass

• sphere

• bulge

Earth has systems that interact with each another.

• 3

• 4

• 5

• 6

Earth’s outermost system is the , which is made up of the layer of gases surrounding the planet.

• biosphere

• hydrosphere

• atmosphere

• geosphere

Earth’s includes all the water found on Earth’s surface, below ground, and as a liquid in the atmosphere.

• biosphere

• atmosphere

• hydrosphere

• geosphere

As ___________ moves between the air and Earth’s surface forming raindrops or evaporating from puddles, the atmosphere and the hydrosphere interact.

• water

• oxygen

• dirt

• gases

Earth’s entire solid body is called the .

• biosphere

• atmosphere

• hydrosphere

• geosphere

All the living things on Earth form the .

• biosphere

• atmosphere

• hydrosphere

• geosphere

_____________ made the material in the cloud come together to form the Sun and the rest of the solar system.

• Density

• Gravity

• Temperature

• Nebula

The strength of gravity depends on the amount of in objects. It also depends on the __________ between objects.

• force, mass

• water, distance

• mass, attraction

• mass, distance