Quiz: Timing is Everything!

Sometimes minutes matter when it comes to your health. So does the day and time of day. Ready, set, learn!

Sari Harrar Health March 27, 2015


How fast can a child drown, or die in a hot car? When is the worst time to have surgery? How much screen time hurts your eyes? Test your timing smarts.

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chocolate chip cookies

Question 1 of 11 Score: 0

How long would you have to walk to burn off the calories in three small chocolate chip cookies?

To burn off the 160 calories in a serving of three cookies from a popular, packaged brand, you’d have to hoof it at a brisk 15-minutes-per-mile pace for 30 minutes if you weight 150 pounds. If you weigh more you’ll burn a bit more, and vice versa.

child in car

Question 2 of 11 Score: 0

How fast can the temperature inside a closed car rise to deadly levels on a hot sunny day?

Stanford University emergency medicine researchers found that when the outside air was 88 degrees Fahrenheit, temperatures inside rose to 110 degrees in about ten minutes. That’s enough time for a child’s body temperature to rise to 106 degrees, a life-threatening situation that can lead to brain and organ damage, heat stroke and seizures.

brushing teeth

Question 3 of 11 Score: 0

How long after drinking soda, coffee, tea or OJ should you wait to brush your teeth?

“Because these beverages are acidic, they can temporarily soften tooth enamel,” says Sivan Finkel, DMD. “Brushing after drinking them can damage the surface of your teeth.” One study found that waiting 30 to 60 minutes resulted in considerably less loss of dentin (the layer under enamel) than brushing after just 10 or 20 minutes.


Question 4 of 11 Score: 0

What is the worst time of day to have surgery?

Some research suggests doctors are less sharp as the day goes on. In one study of doctors performing endoscopies, each elapsed hour in the day was associated with a 4.6 percent reduction in polyp detection. In another study, risk for adverse events related to anesthesia was higher in patients whose surgery started at 3 p.m. or 4 p.m. than in those treated at 7 a.m.

aerobic exercise

Question 5 of 11 Score: 0

How much aerobic exercise do people need each week for optimal health?

According to the Centers for Disease Control and Prevention, adults should aim for 150 minutes of moderate exercise (like brisk walking) or 75 minutes of vigorous exercise (like jogging or lap swimming) each week to control weight and lower risk for heart disease, diabetes and other chronic illnesses. More is even better.

screen time

Question 6 of 11 Score: 0

How long can you look at a screen before developing symptoms of computer vision syndrome?

In a small study, it took just 20 minutes for eye strain and discomfort to develop. The number of blinks per minute drops from 20 to as low as 7 when we stare at a screen, blurring vision as the eye’s surface becomes dry and cloudy. The muscle that controls close focus stays engaged, causing eye fatigue and headaches.


Question 7 of 11 Score: 0

When it’s 0 degrees and the wind is at 15 mph, how fast will exposed skin develop frostbite?

When the temperature plummets and the wind speed picks up, cover up all bare skin before venturing outdoors. Or wait until things warm up. The colder and windier it is, the faster you can get in trouble. According to the National Weather Service, it takes just five minutes to develop frostbite at -15 degrees with 45 mile-per-hour winds howling.

child swimming

Question 8 of 11 Score: 0

How fast can a child drown when unattended in a tub or pool?

According to the Safe Kids Worldwide, the majority of kids who survive a near-drowning are discovered within 2 minutes. A child loses consciousness 2 minutes after slipping below the water surface. Irreversible brain damage happens in 4 to 6 minutes. Don’t leave kids unattended in the bathtub or unsupervised while swimming.


Question 9 of 11 Score: 0

How much summer sun exposure do you need to significantly boost your vitamin D levels?

Memorial Sloan-Kettering Cancer Center researchers estimate that in the summer in the Northern Hemisphere, a Boston resident would need 6 to 8 minutes of sun exposure without sunscreen (and with about 25 percent of their skin bare) to synthesize 400 IU of vitamin D.

TV time

Question 10 of 11 Score: 0

How much screen time do experts recommend kids over age 2 be limited to each day?

Watching any more cuts into time they spend being active, raising their risk for obesity, sleep problems, anxiety and depression, the American Academy of Pediatrics warns. Sitting and staring at a TV also exposes kids to more advertising for unhealthy foods and encourages mindless munching, the AAP notes.

stepping on scale

Question 11 of 11 Score: 0

What's best day of the week for weigh-ins that help you lose weight?

Researchers from Cornell University and Finland’s Tempere University of Technology found that weight followed a weekly cycle and was lowest on Wednesdays — making the middle of the week the most consistently accurate and inspiring time to step on your bathroom scale.


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