Week 2 - Changing Earth

According to the theory of Natural Selection, individuals that survive and reproduce are those that..

• Produce the most offspring

• Produce the greatest variety of offspring

• Have variations that are best suited to survival in that particular environment

• Encounter the least competition from other species

• Have become faster and stronger over time

What is the composition of the Earth's atmosphere?

• 79% Nitrogen, 20% Oxygen, 1% other gases

• 79% Nitrogen, 20% Carbon Dioxide, 1% other gases

• 79% Carbon Dioxide, 20% Nitrogen, 1% other gases

• 49% Nitrogen, 30% Carbon Dioxide, 1% Other gases

Which is true about planet Earth?

• Much of the seismic activity occurs at the boundary of the tectonic plates

• The inner Earth is comprised only of a liquid core

• The outer layer is broken into tectonic plates which are rigidly fixed to the inner mantle

• Gondwana land describes a northern land mass that was once joined.

What is the difference between weather and climate?

• Climate is short term, weather is day to day

• Climate is regional, weather is local

• Climate is long term, weather is short term

• They are interchangeable

Which of the following is true about rocks?

• Rocks are the same as minerals

• Rocks are matter composed of a singular type of mineral

• Rocks do not contain minerals

• Rocks are mixtures of different types of minerals

Which of the following is not a type of rock that makes up the rock cycle

• Sedimentary

• Metamorphic

• Igneous

• Magma

Metamorphic rocks are formed as a result of..

• Extreme heat or pressure

• The settling and compaction of particles

• The melting of solid rock

• The transformation of crystals over time

Which type of information can be gained from ice cores? Choose all that apply.

• Past composition of Earth's atmospheric gases

• Types of pollen (and hence plant types) that were once present

• Particles of dust, ash, trace elements that were present in the atmosphere when the ice froze

What is the half-life of a radioactive isotope in a fossil defined as?

• Half the age of the fossil

• The ration of daughter (unstable) to parent (stable) isotope in a fossil

• The time it takes for half the (unstable) parent isotope in the fossil to break down into a (stable) isotope

Earth's crusts move on top of the..

• Ocean

• Mantel

• Outer core

• Inner core