What is the primary function of the Earth's atmosphere?

Atmosphere protects life on Earth.

• Provides essential warmth.

• Absorbs harmful radiation.

• Stabilizes climate conditions.

The Earth's crust is compared to which part of an egg?

The Earth's crust is compared to the thin shell of a hard-boiled egg, highlighting its thinness relative to the other layers of the Earth.

Fill in the blank: The thickness of the Earth's crust varies from ___ km on land to ___ km under the oceans.

25-90 km on land; 5-10 km under the oceans.

True or False: The Earth's mantle is a solid layer that does not flow.

False. The Earth's mantle is made of hot rock that is sticky and flows slowly.

Riddle: I am the outermost layer of the Earth, thin as a shell. Without me, life would not thrive, and the sun's rays would be a danger. What am I?

The Earth's atmosphere.

What materials are believed to make up the solid inner part of the Earth's core?

The solid inner part of the Earth's core is believed to be made from iron and nickel.

What hypothesis did Alfred Wegener propose in 1912 regarding the movement of continents?

Continental drift explains land movement.

• All continents were once connected.

• Theory proposed by Alfred Wegener.

• Movement occurred over millions of years.

Fill in the blank: The coastlines of continents show patterns of layers of different types of rock that ___, supporting Wegener's hypothesis.

Match

True or False: Wegener was able to clearly explain the mechanism behind the movement of continents.

False; Wegener could not explain what caused the continents to move.

Riddle: I was once a supercontinent but have now split into many. I hold the secrets of ancient climates and fossils. What am I?

Pangaea

What evidence did Wegener find regarding identical fossils, and what conclusion did it support?

Continents were once connected.

• Identical fossils found globally.

• Species unable to travel far.

• Supports continental drift theory.

Fill in the blank: The theory that continents were once joined together and have moved apart over time is known as ___ drift.

Continental

Short Answer: Who suggested that the continents around the Atlantic Ocean had been joined together millions of years ago before Wegener?

German biologist Alexander von Humboldt suggested this idea.

Which scientist faced opposition to his ideas about continental drift at a conference, stating that accepting his hypothesis would require disregarding previous scientific knowledge?

Alfred Wegener faced this opposition.

What significant geological theory was developed in the 1960s that built upon Wegener's hypothesis of continental drift?

The theory of plate tectonics.