Unit 1-Objective 1

Question 1

Nebular Theory Step 1

Answer 1

Nebula starts to collapse

Question 2

Nebular Theory Step 2

Answer 2

Nebula develops a point of rotating material and flattens like a disc

Question 3

Nebular Theory Step 3

Answer 3

Chunks of smaller rocky material collide

Question 4

Nebular Theory Step 4

Answer 4

Gravity increases size, attracting surrounding objects

Question 5

Nebular Theory Step 5

Answer 5

Planetesimals begin to collide through gravity becoming protoplanets

Question 6

Nebular Theory Step 6

Answer 6

Formation of planet

Question 7

The half-life of cobalt -60 is 5 years if you have 10 grams of co-60 how much do you after 15 years?

Answer 7

1.25 grams

Question 8

Explain why it is difficult to determine the age of the Earth using samples of rock from the earth:

Answer 8

Earth’s oldest rocks have been recycled and destroyed by the process of plate tectonics.

Question 9

List 3 things that can be used as evidence of the age of the Earth:

Answer 9

Radiation Measurement. Stratigraphic Superposition. The Fossil Record.