Q: Q: On insects, what are the openings on the sides of the abdomen that allows respiration to occur? Choices: - gills - wings - chloroplasts - spiracles A:
A: spiracles

Q: Q: What term describes weathering that occurs as water expands when it freezes, wedging apart rock? Choices: - chemical weathering - cleavage - erosion - mechanical weathering A:
A: mechanical weathering

Q: Q: What are the two components of a mixture called? Choices: - nutrients and a solvent - acid and base - concentration and a solvent - solute and a solvent A:
A: solute and a solvent

Q: Q: What is a group of organs that work together to do the same job? Choices: - an organ colony - an organ assembly - an organ battery - an organ system A:
A: an organ system