Lesson 10: Earth in the Solar System

What is the cloud of gases and dust particles that formed our solar system?

• planetesimal

• solar nebula

• gravity

• density

What is an object in space that continues to grow to form a planet called?

• planetesimal

• wind

• planetary

• gravity

What is the force of attraction between two objects because of their masses?

• density

• magma

• gravity

• planetesimal

What is the ratio of a substance's mass to its volume?

• density

• solar nebula

• ozone layer

• lava

What layer of Earth is the thin, outermost layer?

• the inner core

• the crust

• the mantle

• the outer core

What is Earth's middle layer found between the crust and the core?

• the inner core

• the outer core

• the crust

• the mantle

What is hot, liquid rock within Earth?

• lava

• mantle

• magma

• inner core

What is magma that flows to Earth's surface called?

• lava

• magma

• ozone layer

• crust

What is the central part of Earth?

• the mantle

• the core

• the crust

• lava

What is the mixture of gases that surrounds Earth?

• ozone layer

• pressure

• rotation

• atmosphere