6th grade earth and rocks

Example

What type of rock is gneiss?

1. Metamorphic rocks form when other rocks are changed by heat and pressure without melting.
2. So the answer is: metamorphic

Answer: metamorphic

Example

Which layer of the Earth is liquid?

1. The outer core is liquid iron and nickel; the inner core is solid.
2. So the answer is: the outer core

Answer: the outer core

Example

Which type of weathering is this: water freezes in a crack, expands and splits the rock?

1. Physical weathering breaks rock into pieces without changing its chemicals.
2. So the answer is: physical (freeze–thaw, heating and cooling)

Answer: physical (freeze–thaw, heating and cooling)

Example

Why do we have very few fossils of jellyfish?

1. Soft-bodied organisms rarely fossilise, which is one reason the fossil record is incomplete.
2. So the answer is: They have no hard parts, so they usually rot before being preserved

Answer: They have no hard parts, so they usually rot before being preserved

Example

Undisturbed rock layers, listed from the bottom up: D, C, E. Which layer is the youngest?

1. In undisturbed layers, the lowest is oldest and the highest is youngest.
2. So the answer is: E

Answer: E