Question:
Use evidence from the fact that friction acts to counter the motion of two objects when their surfaces are touching to answer the following question. OPTIONS:
- marble floors
- a shag runner
- wood floors
- ice "I would have a harder time sliding with my socks on"

Answer:
a shag runner

Question:
Use evidence from the fact that natural magnetism is used for pointing north by a compass to answer the following question. OPTIONS:
- the world is positive
- the world is wet
- the Earth is fat
- the Earth yanks it "A compass uses natural magnetism so it works only because"

Answer:
the Earth yanks it

Question:
Use evidence from the fact that the respiratory system takes in oxygen from the air to answer the following question. OPTIONS:
- insects
- birds
- plants
- bears "The substance that the respiratory system takes in from the air is released by"

Answer:
plants