Exit Check 8.3 - Earth's Timeline

Front

What is the process called when smaller particles collect together into larger objects?

Back

Accretion

Front

Which type of rock sample is useful for determining when planets first formed in the solar system?

Back

Chondrite Meteorites

Front

Which type of rock sample helps us find out when a planet other than Earth cooled enough to form solid rock?

Back

Martian Meteorites

Front

If the Jack-Hills Zircons formed in wet conditions, what must be true about Earth's temperature at that time?

Back

Earth was cool enough for water to pool before the zircons were formed.

Front

How did the Rosetta mission contribute to our understanding of the origin of Earth's water?

Back

The Rosetta mission measured the types of hydrogen in comet water so that we could compare it to Earth water.

Front

What are Chondrite Meteorites?

Back

Chondrite Meteorites are stony meteorites that are believed to be some of the oldest materials in the solar system, providing insights into the early solar system.

Front

What is the significance of Martian Meteorites in planetary science?

Back

Martian Meteorites provide evidence about the geological history of Mars and help determine when it cooled enough to form solid rock.

Front

What do Jack-Hills Zircons indicate about early Earth conditions?

Back

Jack-Hills Zircons suggest that liquid water existed on Earth at least 4.4 billion years ago.

Front

What was the main goal of the Rosetta mission?

Back

The main goal of the Rosetta mission was to study the comet 67P/Churyumov-Gerasimenko and understand the origins of water and organic materials in the solar system.

Front

Define 'accretion' in the context of planetary formation.

Back

Accretion is the process by which particles and small bodies in space collide and stick together, gradually forming larger bodies like planets.