HowStuffWorks Newsletter Quiz (Feb. 20 & Feb. 27, 2021)

By: Contributors  | 

Thanks for taking our weekly newsletter quiz, reader! Answers are below. Have a great and healthy weekend!

Feb. 27, 2021 Quiz

1. False

Around half of fatal crashes are primarily caused by pilot error. Mechanical failure, weather, sabotage and other human error (nonflight crew) are the other common causes of crashes.

Learn more: 5 Reasons Commercial Airplanes Crash

2. In the fallout debris of a nuclear bomb

Einsteinium is a synthetic element, meaning that it cannot be found in nature. On Nov. 1, 1952, a team of American scientists working for the U.S. military detonated "Ivy Mike," the world's first hydrogen bomb. Workers in protective suits gathered fallout material from a neighboring island and sent it back to Berkeley Lab in California for analysis. There, a team of Manhattan Project researchers isolated just 200 atoms of a brand-new element containing 99 protons and 99 electrons

Read more: Scientists Unlock Secrets of H-bomb Element Einsteinium

3. Fact

It requires more energy to keep the house at its normal temperature than it does to heat it back up. That doesn't mean you should shut the furnace or air conditioning unit off entirely before you leave your house, especially if you're going to be gone for a while. When a house gets too cold, it puts the pipes at danger of freezing. If you're looking for a sweet spot, keep the thermostat at about 68 degrees F (20 degrees C) when you're home and drop it down to about 55 degrees (13 degrees C) before you go out or go to bed.

Read more: Should You Turn Your Heat Down When You're Not Home?

4. True

Even though food was canned in tin cans around 1813, can openers for home use didn't become popular until the 1860s. Before then? Hammer and chisel.

Read more: Does Canned Food Really Deserve a Bad Rap?

5. Blue

When selecting a backdrop color, anything that resembles human skin tones is probably a non-starter. You can't have the leading lady's hands and face disappear without warning. Bright green and royal blue look nothing like human skin, and they're seldom used in costumes. For these reasons, they've become the two most popular backdrop color choices in scenes that depend on chroma keying tech.

Read more: Green Screens and the Art of Filming Crazy Cool Effects

6. Babylon

The king Hammurabi united warring Mesopotamian tribes into a single powerful city-state and created his famous legal code to help keep the peace among people that were without ties of blood or religion. This early system of retributive justice — inscribed on an 8-foot (2.4-meter) diorite obelisk that is housed in the Louvre in Paris — is believed to have been the basis of the ancient Hebrews' code of laws laid out in Exodus, known as "an eye for an eye, a tooth for a tooth."

You might like: Where Was Babylon and Does It Still Exist?

Looking for more answers? We have them for you!

Feb. 20, 2021 Quiz

1. True

Human dander allergy in dogs is often mistaken for chronic dermatitis. One of the first signs that will present itself is excessive scratching, which is often followed by sneezing, coughing, and even wheezing. The breeds that are most at risk for developing a human dander allergy are bulldogs, German shepherds, miniature schnauzers, pugs, retrievers, setters, and terriers.

Read more: Why Do Dogs (and Cats) Shed So Much?

2. 7,400

Between 1999 and 2016 the average case count for mushroom poisoning was 7,428 per year. The majority of cases were frequently unintentional and caused no or only minor harm. Approximately 39 cases per year resulted in major harm. The 2.9 fatalities per year were mostly caused by cyclopeptide-producing mushrooms, which some foragers mistake as edible mushrooms.

Read more: Mushrooms: Wash 'em or Brush 'em Off?

3. False

The Gompertz law of mortality is accurate for most mammals after they reach sexual maturity. The only one that straight-up defies it is the naked mole rat.

Read more: How Did Benjamin Gompertz Predict Our Deaths?

4. False

Freezing Niagara Falls solid would be quite a feat. During the winter, a whopping 22.4 million gallons (85 million liters) of water tumble over the falls per minute. Scientists say it'd be extremely difficult to freeze that much fast-flowing water, even in subzero temperatures.

Related: How in the World Does a Waterfall Freeze?

5. Doused in acid; thrown rock

Everyone has haters — including Mona Lisa. In 1956, a Louvre visitor threw acid at her and another person pelted her with a rock. She was attacked with spray paint in 1974 and a rogue coffee cup in 2009, but thankfully, she'd already been protected by bulletproof glass by the time those two incidents took place.

Read more: Why Is the World So Captivated by the Mona Lisa?

Originally Published: Nov 19, 2020