Answer:
The veins that carry oxygenated bloof back into the heart are the pulmonary arteries.
Explanation:
Oxygen-rich blood flows from the lungs back into the left atrium (LA), or the left upper chamber of the heart, through four pulmonary veins. Oxygen-rich blood then flows through the mitral valve (MV) into the left ventricle (LV), or the left lower chamber.
Control group: 50 dogs continuing their normal diet
Experiments group: 50 dogs chosen to eat the new food
Independent variable: dog food
Dependent variable: the dogs’ weight
Answer:
Book on Table
Car at the Hilltop
Falling Objects
Skydiver
Hammering a Nail
Dam Water
Roller Coaster
Stretched Rubber Band
Simple Pendulum
Compressed Spring
Battery
Flashlight
Exothermic Chemical Reaction
Burning of Oil, Gas and Coal
Wind Turbine
Explanation:
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