carbon dioxide

Home/Tag: carbon dioxide
19 08, 2017

What’s the atmosphere? Weather science

By |2019-02-05T05:47:27-07:00August 19th, 2017|Physics|0 Comments

Earth's atmosphere: Did the Earth look like this right after it cooled down? What is the atmosphere? The atmosphere is the air that is wrapped all around a planet. Read more about planets Why is the sky blue? All our physics articles Do all planets have atmospheres? Not all planets have atmospheres. In order [...]

18 08, 2017

Mars, the red planet – Astronomy

By |2018-05-31T11:49:29-07:00August 18th, 2017|Physics|0 Comments

Mars, the way the planet looks from space The closest planet to Earth is Mars, and Mars is also the planet that seems most likely to have life on it besides our own Earth. It's the next planet further away from the Sun after Earth. When you look at Mars from Earth, it looks reddish, and even [...]

24 06, 2017

What happened in the Cretaceous Period?

By |2019-04-29T06:34:15-07:00June 24th, 2017|Geology|0 Comments

Volcano erupting When was the Cretaceous period? During the Cretaceous period, beginning about 145 million years ago, the continents continued to drift away from each other. Plate tectonics Back to the Jurassic Summary of geological eras All our geology articles What happened during the Cretaceous? Because the continents were separated, mammals, birds, and [...]

20 06, 2017

Global warming in modern times

By |2019-07-07T11:22:27-07:00June 20th, 2017|Environment, Science|0 Comments

Coal plant in China: causing global warming When did global warming start? Human activities probably started to affect the world's climate as early as about 10,000 BC. That's when people started farming and cut down a whole lot of trees to create their fields. Climate change in world history Medieval warming The Little [...]

2 06, 2017

What is oxygen? Atoms, elements, chemistry

By |2018-04-24T14:46:22-07:00June 2nd, 2017|Chemistry|0 Comments

Diagram of an oxygen atom When a star has changed all of its hydrogen atoms into helium, it turns into a red giant and moves on to convert the helium atoms into carbon atoms and oxygen atoms. All of the oxygen in the universe starts out inside stars. Then when all the helium is used up, [...]

1 06, 2017

Helium balloon projects – Chemistry

By |2018-04-16T17:38:04-07:00June 1st, 2017|Chemistry|0 Comments

You can see that helium is lighter than air by getting a helium balloon. When you let go of it, it goes up, because the helium is lighter than the nitrogen and oxygen and carbon dioxide that make up most of the air, so the helium floats, and it pulls the balloon with it. A [...]

1 06, 2017

Carbon dioxide project with Dry Ice – Chemistry

By |2019-05-17T21:25:45-07:00June 1st, 2017|Chemistry|0 Comments

Frozen carbon dioxide (dry ice) - for your carbon dioxide project How can you see carbon dioxide? Normally you can't see carbon dioxide because it is an invisible gas. But if you get some frozen carbon dioxide (also called dry ice), you can see it as chunks of ice. You can get dry [...]

1 06, 2017

What are covalent bonds? – Atoms and Chemistry

By |2019-04-27T14:24:16-07:00June 1st, 2017|Chemistry|0 Comments

Covalent bonds: two hydrogen molecules bonding to an oxygen molecule Covalent bonds stick atoms together When two atoms come near each other, sometimes they stick together to make a molecule. One way they can stick together is by covalent bonding. Ionic bonding More about molecules What are atoms? All our chemistry articles Are covalent [...]

1 06, 2017

What is carbon dioxide? Molecules and Chemistry

By |2019-02-28T09:28:34-07:00June 1st, 2017|Chemistry|0 Comments

Tobacco plants growing put carbon dioxide molecules back into the air - like all plants What is carbon dioxide made of? Carbon dioxide is one of the simplest and commonest molecules in the universe. It has only three atoms - one carbon and two oxygen atoms. More about carbon What is a molecule? All [...]