Sheet # 95/Heart
Name: _____________________ Date_____________
Show your work.
Fact 1: The average adult heart weighs about 11 ounces or 310 grams.
Fact 2: A seven year old child's heart beats about 90 times per minute at rest.
Fact 3: An adult's heart beats about 70 times per minute at rest.
Fact 4: The heart pumps about 5 liters of blood every minute.
1) How many times will a child's heart beat in a 30 minute Math class? in 1 hour? While the child is asleep? in 1 day?
2) How many times will a teacher's heart beat in a 30 minute Math class? in 1 hour? in 1 day?
3) How many liters of blood will a heart pump in a 30 minute Math class? in one hour? in a day?
Answers for Sheet # 95
1) 30 minutes x 90 beats/minute = 2700 beats
60 minutes x 90 beats = 5400 beats/hour
5400 x 10 hour (sleep) = 54,000 beats
5400 x 24 hours = 129600 beats/day
2) 70 beats x 30 minutes = 21 beats
70 beats x 60 minutes = 4200 beats/hour
4200 x 24 = 100800 beats/day
3) 5 liters x 30 minutes = 150 liters
5 x 60 = 300 liters/hour
300 x 24 = 7200 liters/day