References:

10- Can a tree without leaves still produce oxygen?

https://www.quora.com/Photosynthesis-How-do-we-get-oxygen-in-winter-when-trees-dont-have-leaves-and-theres-no-sunshine

https://sciencing.com/photosynthesis-pine-trees-5851690.html

http://www.rsc.org/Education/Teachers/Resources/cfb/Photosynthesis.htm


9 - What would happen if Mars was as close as our Moon?

https://www.quora.com/What-if-Mars-were-our-moon-at-its-current-orbit

https://science.nasa.gov/science-news/science-at-nasa/2005/07jul_marshoax

8 - Do animals abandon their young if they are touched by another creature?

https://www.scientificamerican.com/article/fact-or-fiction-birds-abandon-young-at-human-touch/

https://www.livescience.com/33620-baby-bird-touch-mother-abandon.html

7 - How much of your body could you lose and survive?

http://abcnews.go.com/Health/Wellness/useless-body-parts-explained/story?id=23979954

https://www.livescience.com/37009-human-body.html

https://www.healthline.com/health/how-much-blood-in-human-body#howmuch-blood-can-you-lose

6 - How do goosebumps work?

https://www.scientificamerican.com/article/why-do-humans-get-goosebu/

http://www.huffingtonpost.co.uk/entry/why-we-get-goosebumps_n_1375723

5 - What would happen if there was no dirt on Earth?
https://www.care2.com/greenliving/what-would-happen-if-the-worlds-soils-disappeared.html

http://world.time.com/2012/12/14/what-if-the-worlds-soil-runs-out/

https://askmax.countrymax.com/lawn_and_gardenDetail.php?Soil-Vs.-Dirt-What-is-the-difference-46

4 - Can bacteria have bacteria?

http://indianapublicmedia.org/amomentofscience/can-bacteria-get-sick/

https://www.khanacademy.org/science/biology/biology-of-viruses/virus-biology/a/bacteriophages

https://www.sciencedaily.com/releases/2015/12/151202084238.htm

3 - What does the Sun look like from the inside?

https://www.space.com/17137-how-hot-is-the-sun.html

https://www.space.com/17170-what-is-the-sun-made-of.html


2 - What would happen if we couldn’t feel pain?

https://www.quora.com/What-if-we-couldnt-feel-pain

https://www.sharecare.com/health/pain-management/what-happen-didnt-feel-pain


1 - If the Earth was the same size as the sun, how long would it take to walk around it?

http://jordanbbates.com/2013/space/walking-across-the-sun/

https://curiosity.com/videos/how-long-would-it-take-to-walk-around-the-world-brain-stuff/