4%

Here's Question 1! How many traditional senses are recognized by humans?

5
4
3
6

Stunning!

Not quite right. 😢

-

4%

How many major blood types are there in the human ABO system?

3
2
4
5

That's right!

Doh! 🤬

-

4%

How many chromosomes are there in a typical human cell?

72
23
2
46

You're doing great!

Having difficulty with this one?

-

4%

The number of bones in an adult human skeleton is typically:

250
300
150
206

Fabulous!

Not quite right. 😢

-

4%

The average lifespan of a human red blood cell is about:

180 days
30 days
60 days
120 days

Sensational!

Uh-oh. That was incorrect. 😔

-

4%

How many chambers are there in a human heart?

5
4
2
3

Nice!

Having difficulty with this one?

-

4%

How many elements are on the periodic table?

153
57
118
100

Brilliant! 👍

Uh-oh. That was incorrect. 😔

-

4%

A water molecule (H₂O) contains how many oxygen atoms?

4
3
2
1

Marvelous!

Not quite right. 😢

-

4%

At what temperature do Celsius and Fahrenheit scales read the same value?

-40
-30
-50
-20

That's right!

Nope, sorry. 😢

-

4%

At what temperature does water boil at sea level (in Celsius)?

90
80
100
110

Bravo!

Hmm, I don't think so. 😔

-

4%

The density of water at room temperature is:

1000 kg/m³
500 kg/m³
750 kg/m³
1250 kg/m³

Was that too easy for you?

Not quite.

-

4%

The speed of light in a vacuum is approximately:

200,000 km/s
400,000 km/s
100,000 km/s
300,000 km/s

Woohoo! 🥳

Nope, sorry. 😢

-

4%

Celebrate your progress! You're halfway through the quiz! The pH of pure water is approximately:

11
7
5
9

Perfect! 👊

Having difficulty with this one?

-

4%

The average speed of sound in dry air at room temperature is:

343 m/s
300 m/s
380 m/s
250 m/s

Sensational!

I'm afraid that wasn't it. 😔

-

4%

A typical magnet has how many poles?

3
2
1
4

Bravo!

Uh-oh. That was incorrect. 😔

-

4%

The electromagnetic spectrum encompasses a wide range of radiation types. How many main regions are traditionally recognized within this spectrum?

5
3
7
9

Spot on! 🥳

Hmm, I don't think so. 😔

-

4%

The structure of the earth is divided into how many major components?

4
5
2
3

Spot on! 🥳

Doh! 🤬

-

4%

The gravitational acceleration on Earth is approximately:

5.2 m/s²
9.8 m/s²
10.7 m/s²
8.9 m/s²

Stunning!

Not quite right. 😢

-

4%

How long does it take for Earth to make one rotation on its axis?

24 hours
28 days
7 days
365 days

Beautiful! 👍

Hmm, I don't think so. 😔

-

4%

The Earth is both spinning on its axis and orbiting the Sun at the same time. How long does it take for Earth to orbit the Sun?

365 days
28 days
24 hours
7 days

Yay!

That was incorrect.

-

4%

Earth is estimated to be approximately how many years old?

3.8 billion
5.2 billion
4.5 billion
6.7 billion

Sweet!

Doh! 🤬

-

4%

Keep up the momentum! Scientists estimate the universe to be approximately how many years old?

15.1 billion
10.5 billion
12.3 billion
13.8 billion

Stunning!

Hmm, I don't think so. 😔

-

4%

You're almost done! Excluding dwarf planets, how many planets are currently recognized in our solar system?

7
8
9
10

Beautiful! 👍

That was incorrect.

-

4%

And last but not least, approximately how many years ago did the dinosaurs become extinct?

65 million
30 million
100 million
200 million

Cool! 👍

Uh-oh. That was incorrect. 😔

-

Your Support Makes a Difference

Here's Question 1! How many traditional senses are recognized by humans?

How many major blood types are there in the human ABO system?

How many chromosomes are there in a typical human cell?

The number of bones in an adult human skeleton is typically:

The average lifespan of a human red blood cell is about:

How many chambers are there in a human heart?

How many elements are on the periodic table?

A water molecule (H₂O) contains how many oxygen atoms?

At what temperature do Celsius and Fahrenheit scales read the same value?

At what temperature does water boil at sea level (in Celsius)?

The density of water at room temperature is:

The speed of light in a vacuum is approximately:

Celebrate your progress! You're halfway through the quiz! The pH of pure water is approximately:

The average speed of sound in dry air at room temperature is:

A typical magnet has how many poles?

The electromagnetic spectrum encompasses a wide range of radiation types. How many main regions are traditionally recognized within this spectrum?

The structure of the earth is divided into how many major components?

The gravitational acceleration on Earth is approximately:

How long does it take for Earth to make one rotation on its axis?

The Earth is both spinning on its axis and orbiting the Sun at the same time. How long does it take for Earth to orbit the Sun?

Earth is estimated to be approximately how many years old?

Keep up the momentum! Scientists estimate the universe to be approximately how many years old?

You're almost done! Excluding dwarf planets, how many planets are currently recognized in our solar system?

And last but not least, approximately how many years ago did the dinosaurs become extinct?

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