Discussion List
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Secondary II • 2yr.Hello,
What's the difference between prokaryotic and eukaryotic cells?
Thank you
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Secondary II • 2yr.Hi,
Why do the leaves change color in the fall? Why does the green disappear?
Good evening
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Secondary II • 2yr.Hello! Can humans and plants do both photosynthesis and cellular respiration?
Thank you :)
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Secondary II • 2yr.Hello,
I can't seem to understand how energy can manifest naturally. Can you explain to me how it manifests please?
Thanks a lot!
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Secondary II • 2yr.Hello,
I can't understand the difference between renewable and non-renewable natural resources. Can you explain it to me please?
Thanks a lot!
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Secondary I • 2yr.How does temperature vary with the atmosphere’s altitude? Thank you
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Secondary I • 2yr.Can an object guide and link at the same time?
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Secondary I • 2yr.What is the difference between rotational guiding, translational guiding, and helical guiding?
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Secondary I • 2yr.Hello, what is the difference between a direct and indirect link and a rigid and elastic link?
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Secondary I • 2yr.What is the difference between twist and tension? Thank you :)
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Secondary I • 2yr.Hi!
Can you explain to me what the deformation is, please?
Thank you
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Secondary I • 2yr.Hi! I don't fully understand the difference between movement, force, effects, and consequences ... Can you enlighten me, please?
Thank you 🙂
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Secondary I • 2yr.Hello,
Can you tell me what are the phases of matter present during laboratory distillation?
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Secondary I • 2yr.Hello,
Can we do a filtration to separate all the heterogeneous mixtures?
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Secondary I • 2yr.Hello,
Soon, I'll have an exam on all the labs that we did this year, but I was absent during the lab in which we did decantation. Could you tell me how to proceed?
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Secondary I • 2yr.Hello,
I have to separate mixtures in my laboratory, but I no longer recall techniques. Could you please remind me?
Thanks a lot!
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Secondary I • 2yr.Hello.
I learned about separating mixtures methods in class (evaporation, decantation, filtration, distillation, sieving, centrifugation, paper chromatography, and chemical techniques), but I'm not sure that I use the right technique in the right situation.
Can you explain to me, please?
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Secondary I • 2yr.How do I find the state of the matter if I have pictures like this without description:
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Secondary III • 2yr.Hello! In my homework I need to find the molar concentration of 0.874 kg of H3PO4 in 3L of water, how do I find it?
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Secondary III • 2yr.Hello! I do not understand the link between solvent, solute and solution.
Can someone help me please?
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Secondary III • 2yr.How can we tell the order in which substances float on top of each other (in what order they overlap)?
Thanks!
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Secondary II • 2yr.Hello,
I can't figure out what chemical changes are and how to recognize them. Could you explain me what they are please?
Thanks a lot!
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Secondary II • 2yr.How do you distinguish between physical changes and chemical changes? What is the difference?
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Secondary II • 2yr.Hello,
I have a hard time understanding how physical changes work. Can you explain to me how they work please?
Thanks a lot!
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Secondary II • 2yr.Hello alloprof
How can conservation of matter be experimentally verified?
thank you
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Secondary II • 2yr.Hello,
I can't quite understand how the law of conservation of matter works. Can it be applied for both physical and chemical changes?
Thanks a lot!
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Secondary II • 2yr.A chemical reaction between gases takes place and their volume suddenly doubles. True or false: matter was created.
I need help!!
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Secondary II • 2yr.Hi, I know this is a bit of an easy question, but I'm having a hard time distinguishing between energy and matter.
Can you help me?
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Secondary II • 2yr.What is the difference between photosynthesis and cellular respiration and how to remember it?
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Secondary II • 2yr.Good afternoon,
I don’t really understand the difference between gene, chromosome, DNA and genome?
Can you help me?
Thank you!