Why did miners take canary birds down into the mines with them?

The birds were used to detect the presence of carbon monoxide.
The birds were used for communication.
The birds were used instead of radio.
The birds cried for help in case of a landslide

Amazing facts

In 1935, the International Labour Organization banned women from working as miners, with some exceptions.

Canary birds are particularly sensitive to toxic gases such as carbon monoxide. If a canary has been silent for a while, it's time for evacuation.

How old are students when they enter Hogwarts in the Harry Potter universe?

Amazing facts

In the second book, Harry and Ron used the enchanted car to fly to Hogwarts. They flew directly north, which means that Hogwarts is supposed to be located north of London. However, according to some interviews, Hogwarts is situated somewhere in Scotland.

Hogwarts is a fictional school of magic in the Harry Potter universe. Students have to be minimum 11 years of age to study at Hogwarts. They study for 7 years.

Which holiday do New Yorkers usually celebrate on Times Square?

New Year's Eve
Thanksgiving Day
Independence Day
Easter

Amazing facts

According to statistics, there are 10 times more people bitten by New York residents than there are people attacked by sharks.

Every year, since 1907, on December 31 at 23:59 local time, a huge ball is dropped on Times Square from a height of 23 meters.

What will happen to a grape in a microwave?

It will explode
It will soften
It will boil
It will become a raisin

Amazing facts

Much like the berries, vine leaves are also used in cooking. For example, they can replace cabbage in some dishes. next q

When put in a microwave, a grape will heat on the inside because microwaves will first heat up the water inside the grape. The skin of the berry will not let the water vaporize, so the grape will simply explode.

What was the name of the country of Ghana before 1957?

Gold Coast
Pepper Coast
Sunny Coast
Silver Coast

Amazing facts

This toponym comes from "Ghana" - the title of the rulers of the Ghana Empire, which means a "military leader.

Gold Coast was a British colony on the Gulf of Guinea in West Africa, which later became the independent state of Ghana in 1957.

Which water is the purest?

Rainwater
Lake water
Seawater
Spring water

Amazing facts

In Botswana, in the Tswana language, the word "pula" means rain, and is used as the name for the country's currency because rain is very scarce and valuable in Botswana.

Of all natural sources of water, rainwater is the purest, although not entirely pure. For example, if you collect some rainwater and let it sit for some time, you'll see solid precipitation – those are dust particles that were carried with water from the atmosphere.

What is the capital of Finland?

Helsinki
Copenhagen
Stockholm
Oslo

Amazing facts

Maple tree and squirrel are the symbols of the city.

Helsinki is the capital and the largest city of Finland. The city is located on the shore of the Gulf of Finland in southern Finland.

How many of the Seven Wonders of the Ancient World have survived to this day?

Amazing facts

For about 4,500 years, the Great Pyramid of Giza remained the highest building on Earth only to lose this title in 1880.

The Great Pyramid of Giza is the only one of the Seven Wonders of the Ancient World that has survived to the present day. Other pyramids were never included in the list, to begin with.

What did the South American Indians use as money?

Tobacco leaves
Sugarcane
Sweet potato fruit
Orange peel

Amazing facts

In some countries, such as Australia, Malaysia, and Vietnam, paper money is not actually paper money. It is made of a thin and soft plastic that is durable and does not accumulate bacteria.

The Indians of South and Central America once used cocoa beans and tobacco leaves as money. Livestock is the most common substitute for money around the world.

Which ocean is home to the Philippine Sea?

The Pacific Ocean
The Atlantic Ocean
The Arctic Ocean
The Indian Ocean

Amazing facts

The sea has an average depth of 4,108 meters, and a maximum depth of 10,994 meters.

The Philippine Sea is an oceanic inter-island sea of the Pacific Ocean located near the Philippine archipelago. it is the second largest sea on Earth. It has no clear land borders and is separated from the ocean by groups of islands.