Daily Trivia Quiz - Day 205 (2026-06-04)

Question 1

What does the color of beach sand usually reveal?

Accepted Answer

What its grains are made from

Answer

The average wave height

Answer

The depth of the nearest reef

Answer

The salt level of the last tide

Question 2

Empty seashells on a beach often still make a 'ocean sound' when held to your ear. What are you actually hearing?

Accepted Answer

Ambient noise resonating inside the shell's cavity

Answer

Residual ocean water vibrating inside

Answer

Air trapped from when the animal was alive

Answer

The shell vibrating from temperature changes in the air

Question 3

Trees drop their leaves in autumn partly to survive winter — but there's a surprising secondary benefit. What resource does a tree recover by shedding its leaves?

Accepted Answer

Part of the leaf's nitrogen and other nutrients

Answer

Water stored in the leaf cells

Answer

Sugar produced during the last days of photosynthesis

Answer

Calcium from the leaf's structural tissue

Question 4

Roads are salted in winter to melt ice, how does it melt the snow?

Accepted Answer

It lowers the freezing point of water so ice melts at colder temperatures

Answer

It absorbs heat from sunlight more efficiently than snow

Answer

It creates a chemical reaction that releases heat

Answer

It breaks the molecular bonds holding ice crystals together

Question 5

Road salt used in winter is effective — but it has a well-known environmental downside. What is a major documented ecological impact?

Accepted Answer

It raises salt levels in nearby freshwater lakes and streams

Answer

It makes lake water too acidic for fish

Answer

It blocks sunlight from reaching underwater plants

Answer

It fertilizes lakes by adding nitrogen and phosphorus

Question 6

Dust mites live in house dust and feed on dead skin cells. They're invisible to the naked eye — but they're not actually what causes most dust mite allergies. What does?

Accepted Answer

Their feces and shed exoskeletons

Answer

The dust mites biting human skin

Answer

Bacteria that live on the mites

Answer

Pollen grains carried by the mites

Question 7

On many tropical white-sand beaches, which animal helps make part of the sand?

Accepted Answer

Parrotfish

Answer

Sea turtles

Answer

Jellyfish

Answer

Reef crabs

Question 8

Why should beachgoers be cautious about taking attractive shells from shorelines?

Accepted Answer

They can still serve as habitat and shelter

Answer

They keep beach sand from compacting

Answer

They prevent waves from eroding dunes

Answer

They control the salinity of tide pools

Question 9

Why can sunny days and cool nights make some fall leaves redder?

Accepted Answer

They can boost anthocyanin production

Answer

They increase chlorophyll faster than it breaks down

Answer

They remove carotenoids from leaf cells

Answer

They dry the leaf surface into a red film

Question 10

Prague's Astronomical Clock, built in 1410, still shows 'Babylonian time' — a system almost nobody uses. What is Babylonian time?

Accepted Answer

Hours counted from sunrise, so hour length changes with the season

Answer

Time counted backward from midnight

Answer

A 10-hour day with 100-minute hours

Answer

Time synced to lunar cycles rather than solar