What is the relationship between tissues and organs? OPTIONS:
- Organs are made from one type of tissue.
- Tissues are made from one type of organ.
- Tissues are made from different types of organs.
- Organs are made from different types of tissues.
A: Organs are made from different types of tissues.

Generally, the deeper rock layers of Earth are older than shallower rock layers. How can the collision of two tectonic plates change the order of the rock layers? OPTIONS:
- The rock layers contain pollutants that dissolve soil.
- The rock layers lack water due to extended droughts.
- The rock layers are compressed forming faults and folds.
- The rock layers are moved closer to rivers which erode landforms.
A: The rock layers are compressed forming faults and folds.

Which organ is most responsible for oxygen entering the blood stream? OPTIONS:
- nose
- trachea
- bronchi
- lungs
A: lungs

What event happens in a daily cycle? OPTIONS:
- cliffs erode
- rivers flood
- volcanoes erupt
- high and low tides
A:
high and low tides