(Question)
Q: How does the liquid in a thermometer respond to heat or cold?   Read this paragraph and choose the correct option from the provided answers:  Many thermometers measure temperature with a liquid that expands when it gets warmer and contracts when it gets cooler. Look at the common household thermometer pictured in the Figure below . The red liquid rises or falls in the glass tube as the temperature changes. Temperature is read off the scale at the height of the liquid in the tube. To learn more about measuring temperature, watch the animation “Measuring Temperature” at this URL: http://www. sciencehelpdesk. com/unit/science2/3.   Choices:  - freezes or boils  - disappears  - rises or vaporizes  - expands or contracts   A:
(Answer)
expands or contracts


(Question)
Q: What do you call it when adult fish of the same species come together in a group and release gametes into the water at the same time?   Read this paragraph and choose the correct option from the provided answers:  Nearly all fish reproduce sexually and have separate sexes. Fertilization is generally external, and most fish are oviparous. Many adults of the same species may come together in a group and release gametes into the water at the same time, which is called spawning. Fish hatch into larvae that are different from the adult form of the species.   Choices:  - migration  - schoaling  - poaching  - spawning   A:
(Answer)
spawning


(Question)
Q: What "plumbing" structures inside the veins maintain a unidirectional flow of blood despite the low blood pressure?   Read this paragraph and choose the correct option from the provided answers:     Choices:  - funnels  - tubes  - pumps  - valves   A:
(Answer)
