Q: Birds have air sacs that store inhaled air and push it into their what? Read this paragraph and choose the correct option from the provided answers: Birds have air sacs that store inhaled air and push it into the lungs like bellows. This keeps the lungs constantly filled with oxygenated air. The lungs also contain millions of tiny passages that create a very large surface area for gas exchange with the blood (see Figure below ). Choices: - beaks - bones - abdomens - lungs A:
lungs

Q: Isotopes are named for their number of ______ plus neutrons? Read this paragraph and choose the correct option from the provided answers: Isotopes are named for their number of protons plus neutrons. If a carbon atom had 7 neutrons, what would it be named?. Choices: - electrons - atoms - nuclei - protons A:
protons

Q: If you drive or take the bus to school or work, you are using a vehicle that probably burns gasoline, a material that burns fairly easily and provides energy to power the vehicle. recall that burning is a? Read this paragraph and choose the correct option from the provided answers: If you drive or take the bus to school or work, you are using a vehicle that probably burns gasoline, a material that burns fairly easily and provides energy to power the vehicle. Recall that burning is a chemical change. Choices: - physical change - temperature change - energy change - chemical change A:
chemical change

Q: What do voltmeters measure? Read this paragraph and choose the correct option from the provided answers: 21.4 DC Voltmeters and Ammeters Voltmeters measure voltage, and ammeters measure current. A voltmeter is placed in parallel with the voltage source to receive full voltage and must have a large resistance to limit its effect on the circuit. An ammeter is placed in series to get the full current flowing through a branch and must have a small resistance to limit its effect on the circuit. Both can be based on the combination of a resistor and a galvanometer, a device that gives an analog reading of current. Standard voltmeters and ammeters alter the circuit being measured and are thus limited in accuracy. Choices: - temperature - amplitude - frequency - voltage A:
voltage