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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Aug 17
How do people breathe on a submarine? Submarines can carry a pressurized air supply, but most modern submarines make oxygen through a process called electrolysis.
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How do people breathe on a submarine?
How do people breathe on a submarine? Submarines can carry a pressurized air supply, but most modern submarines make oxygen through a process called electrolysi
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Aug 16
How do people live in the Arctic and the Antarctic? People live in the Arctic by staying warm, protecting themselves from the extreme weather, and having enough food to last through the winter. #antarctic #arctic #indigenouspeople #live #snow
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How do people live in the Arctic and the Antarctic?
How do people live in the Arctic and the Antarctic? People live in the Arctic by staying warm, protecting themselves from the extreme weather, and having enough
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Aug 14
How does hydroelectric power work? Hydroelectric power works by converting the gravitational potential energy of stored water into kinetic energy, and then into electricity.
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How does hydroelectric power work?
How does hydroelectric power work? Hydroelectric power works by converting the gravitational potential energy of stored water into kinetic energy, and then into
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Aug 13
What is the Sargasso Sea? The Sargasso Sea is the only sea in the world that doesn’t have any land borders. It is located in the Atlantic Ocean and has an area of 3.5 million square kilometers. That makes it roughly 3% of the Atlantic Ocean.
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What is the Sargasso Sea?
What is the Sargasso Sea? The Sargasso Sea is the only sea in the world that doesn’t have any land borders. It is located in the Atlantic Ocean and has an are
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Aug 12
What makes a rainbow? A rainbow forms when light is refracted, reflected, and dispersed by raindrops in the air. The rainbow can only be seen from an angle of 42 degrees. The sun, or the source of light, must be behind you.
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What makes a rainbow?
What makes a rainbow? A rainbow forms when light is refracted, reflected, and dispersed by raindrops in the air. The rainbow can only be seen from an angle of 4
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Aug 9
What did Florence Nightingale do? She managed to improve hospital hygiene, made nursing into a profession, used statistical analysis, and became the first female member of the Royal Statistical Society.

Florence Nightingale was born in 1820.
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What did Florence Nightingale do?
What did Florence Nightingale do? She managed to improve hospital hygiene, made nursing into a profession, used statistical analysis, and became the first femal
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Aug 5
What was the Texas Revolution? It was a fight by Texas for independence from Mexico. It led to the Republic of Texas, which didn’t last long before it was absorbed into the growing United States of America.
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What was the Texas Revolution?
What was the Texas Revolution? It was a fight by Texas for independence from Mexico. It led to the Republic of Texas, which didn’t last long before it was abs
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Jul 30
Why do bees buzz? Bees buzz because of the speed with which they beat their wings. All insects with wings make a sound, but some of them are too high pitched for us to be able to hear it.
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Why do bees buzz?
Why do bees buzz? Bees buzz because of the speed with which they beat their wings. All insects with wings make a sound, but some of them are too high pitched fo
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Jul 29
Can alcohol keep you warm? No, alcohol can’t keep you warm. It might make you feel warm for a short period of time, but it will actually make you lose heat in the long term.
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Can alcohol keep you warm?
Can alcohol keep you warm? No, alcohol can’t keep you warm. It might make you feel warm for a short period of time, but it will actually make you lose heat in
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Jul 28
What causes gout? Gout is caused by a buildup of uric acid crystals in joints, which leads to a form of inflammatory arthritis. You have probably heard of gout. King Henry VIII was, amongst other things, famous for suffering from gout.
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What causes gout?
What causes gout? Gout is caused by a buildup of uric acid crystals in joints, which leads to a form of inflammatory arthritis. You have probably heard of gout.
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Jul 25
Why did the Spruce Goose only fly once? The Spruce Goose only flew once because the need for it had passed, it was too heavy, and Howard Hughes lost interest. #HowardHughes #Libertyship #SpruceGoose #WorldWar2
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Why did the Spruce Goose only fly once?
Why did the Spruce Goose only fly once? The Spruce Goose only flew once because the need for it had passed, it was too heavy, and Howard Hughes lost interest.
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Jul 24
What is a calorie? A calorie is a unit of energy. There are small calories and large Calories. A small calorie is a measurement of the energy required to raise 1 gram of water by 1 degree Celsius at 1 atmospheric pressure (or sea level).
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What is a calorie?
What is a calorie? A calorie is a unit of energy. There are small calories and large Calories. A small calorie is a measurement of the energy required to raise
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Jul 23
What was the Gilded Age? It was the period in American history between 1870 and about 1900 where the country rapidly industrialized and there was a lot of wealth inequality. The wealthy became increasingly richer and the poor became increasingly poorer.
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What was the Gilded Age?
What was the Gilded Age? It was the period in American history between 1870 and about 1900 where the country rapidly industrialized and there was a lot of wealt
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Jul 22
How do compound eyes work? Compound eyes work by having a large number of microscopic eyes that each have a lens and see an image, which then gets combined in the brain.

Most of the insects that have eyes have compound eyes.
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How do compound eyes work?
How do compound eyes work? Compound eyes work by having a large number of microscopic eyes that each have a lens and see an image, which then gets combined in t
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Jul 17
How many atoms are there in the vacuum of space? Technically, in a true vacuum, there would be zero atoms, but it is impossible to make a completely true vacuum. There will always be some atoms.
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How many atoms are there in the vacuum of space?
How many atoms are there in the vacuum of space? Technically, in a true vacuum, there would be zero atoms, but it is impossible to make a completely true vacuum
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Jul 1
What is the conservation of energy? Conservation of energy is the principle behind the First Law of Thermodynamics. The Law of Conservation of Energy says that you can change the state of energy, but energy can never be created and energy can never be destroyed.
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What is the conservation of energy?
What is the conservation of energy? Conservation of energy is the principle behind the First Law of Thermodynamics. The Law of Conservation of Energy says that
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Jun 30
What do enzymes do? Enzymes are proteins that start and speed up chemical reactions in the body. Without enzymes, we could not survive.
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What do enzymes do?
What do enzymes do? Enzymes are proteins that start and speed up chemical reactions in the body. Without enzymes, we could not survive. Without them, our digest
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Jun 29
What is the fizz in fizzy drinks? The fizz in fizzy drinks comes from carbon dioxide, which is why the process is called carbonation, and they are called carbonated beverages.

A lot of drinks have a natural fizz.
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What is the fizz in fizzy drinks?
What is the fizz in fizzy drinks? The fizz in fizzy drinks comes from carbon dioxide, which is why the process is called carbonation, and they are called carbon
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Jun 28
What is continentality? Continentality is the condition of being in the center of a large landmass, which makes summers much hotter and winters much colder than other places. #]temperature #climate #cold #continent #continentality #hot #ocean #weather
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What is continentality?
What is continentality? Continentality is the condition of being in the center of a large landmass, which makes summers much hotter and winters much colder than
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Jun 27
How do the phases of the moon happen? The phases of the moon happen because only one side of the moon faces the Earth at any one time and as the moon rotates we can’t see the lit side.

This question was surprisingly difficult for me to get my head around.
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How do the phases of the moon happen?
How do the phases of the moon happen? The phases of the moon happen because only one side of the moon faces the Earth at any one time and as the moon rotates we
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Jun 20
How does sunscreen work? Sunscreen works by either reflecting the ultraviolet rays back up, or by absorbing the ultraviolet rays.

When we go out into direct sunlight, we are coming into a lot of energy that the sun is sending our way.
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How does sunscreen work?
How does sunscreen work? Sunscreen works by either reflecting the ultraviolet rays back up, or by absorbing the ultraviolet rays. When we go out into direct
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Jun 19
Why is soil pH important? The pH of the soil affects what kinds of nutrients and chemicals can be absorbed by water and then taken up by plants. Some plants like a high pH and some like a low pH.

PH is a way of measuring how acidic or alkaline something is.
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Why is soil pH important?
Why is soil pH important? The pH of the soil affects what kinds of nutrients and chemicals can be absorbed by water and then taken up by plants. Some plants lik
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Jun 18
How do AIDS drugs work? AIDS drugs work by preventing the HIV (Human Immunodeficiency Virus) form being able to multiply.

AIDS and HIV are not the same thing. AIDS stands for Acquired Immune Deficiency Syndrome. HIV causes AIDS.
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How do AIDS drugs work?
How do AIDS drugs work? AIDS drugs work by preventing the HIV (Human Immunodeficiency Virus) form being able to multiply. AIDS and HIV are not the same thing
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · Jun 16
What is the last common chimp-human ancestor? The last common chimp-human ancestor was probably about seven million years ago, possibly, although there are no remaining fossils of this animal.
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What is the last common chimp-human ancestor?
What is the last common chimp-human ancestor? The last common chimp-human ancestor was probably about seven million years ago, possibly, although there are no r
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ilearnedthistoday.bsky.social @ilearnedthistoday.bsky.social · May 27
What is Agent Orange? Agent Orange is a herbicide that is also a defoliant. That means it makes trees lose their leaves.

Agent Orange got its name because the 55 gallon barrel it was stored in had an orange band around it.
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What is Agent Orange?
What is Agent Orange? Agent Orange is a herbicide that is also a defoliant. That means it makes trees lose their leaves. Agent Orange got its name because th
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