Why do scientists focus their attention on sedimentary rock? How do you know? A It is a type of rock that builds up slowly. "Koobi Fora is made up of sedimentary rock, a type of rock that forms when sediment, or sand and soil, builds up in layers."
B
It is the primary rock found in Koobi Fora. "All lakes, rivers and streams carry sediment, such as soil and sand."
C
It is where many fossils are located. "Bones of ancient humans and other animals stay buried in the rock and can become fossils."
D
It contains a special rock called tuff. "Over time, it is packed together into a special kind of rock called tuff."

Astudent conducts an experiment to see how music affects plant growth. the student obtains four identical plants. each one is potted in the same type of soil and receives the same amount of sunlight and water each day. plant a listens to classical music for three hours each day. plant b listens to rock music for three hours each day. plant c listens to country music for three hours each day. plant d does not listen to any music at all. 2. based on the experiment in the scenario, which visual aid would be most in showing the change in the plants' heights over time? a. a pie chart b. a line graph c. a timeline d. a bar graph

Mexico city is an example of how humans alter their environment because it was a. one of the world’s largest cities b. built on drained and filled lake beds c. built after conquest by the spanish d. once the capital of the aztec empire

How will globalization most likely affect language around the world? no new languages will be created. nations will adopt a universal language. more languages will become extinct. english will become less prevalent. languages will grow more isolated and distinct.