What is your question?

{t c="richEditor.description.title"} {t c="richEditor.description.paragraphMenu"} {t c="richEditor.description.inlineMenu"} {t c="richEditor.description.embed"}

Mathematics English History Science Physics Chemistry Geography Contemporary World Financial Education French Other

Grade 1 Grade 2 Grade 3 Grade 4 Grade 5 Grade 6 Secondary I Secondary II Secondary III Secondary IV Secondary V Postsecondary

Publish

Discussion List

• Verified by Alloprof
  ZenZombie9054

  Verified by Alloprof

  Secondary II • 3yr.

  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!

  Science

  0

  1 answer
• Verified by Alloprof
  ZenZombie9054

  Verified by Alloprof

  Secondary II • 3yr.

  How do you distinguish between physical changes and chemical changes? What is the difference?

  Science

  0

  1 answer
• Verified by Alloprof
  ZenZombie9054

  Verified by Alloprof

  Secondary II • 3yr.

  Hello,

  I have a hard time understanding how physical changes work. Can you explain to me how they work please?

  Thanks a lot!

  Science

  0

  1 answer
• Verified by Alloprof
  ZenZombie9054

  Verified by Alloprof

  Secondary II • 3yr.

  Hello alloprof

  How can conservation of matter be experimentally verified?

  thank you

  Science

  0

  1 answer
• Verified by Alloprof
  ZenZombie9054

  Verified by Alloprof

  Secondary II • 3yr.

  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!

  Science

  0

  1 answer
• Verified by Alloprof
  QuietDragon2728

  Verified by Alloprof

  Secondary II • 3yr.

  A chemical reaction between gases takes place and their volume suddenly doubles. True or false: matter was created.

  I need help!!

  Science

  0

  1 answer
• Verified by Alloprof
  QuietDragon2728

  Verified by Alloprof

  Secondary II • 3yr.

  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?

  Science

  0

  1 answer
• Verified by Alloprof
  QuietDragon2728

  Verified by Alloprof

  Secondary II • 3yr.

  What is the difference between photosynthesis and cellular respiration and how to remember it?

  Science

  0

  1 answer
• Verified by Alloprof
  QuietDragon2728

  Verified by Alloprof

  Secondary II • 3yr.

  Good afternoon,

  I don’t really understand the difference between gene, chromosome, DNA and genome?

  Can you help me?

  Thank you!

  Science

  0

  1 answer
• Verified by Alloprof
  QuietDragon2728

  Verified by Alloprof

  Secondary II • 3yr.

  What is the difference between the mechanisms of transformation and transmission of movement? I don’t understand.

  Science

  0

  1 answer
• Verified by Alloprof
  DeltaPotassium727

  Verified by Alloprof

  Secondary I • 3yr.

  At the molecular level, what explains the phase changes?

  Thanks!

  Science

  0

  1 answer
• Verified by Alloprof
  DeltaPotassium727

  Verified by Alloprof

  Secondary I • 3yr.

  Hello, can you help me with one of my homework numbers? It says:

  "Determine the phase of the substance with the statements below:

  a) I am an incompressible substance, my particles are ordered, brought together and linked together, and only vibrate.

  B) I am a compressible substance, my particles can vibrate and make rotational and translational movements

  c) I am an incompressible substance, with undefined volume and my particles are disordered and loosely bound together. ”

  Thank you for your help!

  Science

  0

  1 answer
• Verified by Alloprof
  DeltaPotassium727

  Verified by Alloprof

  Secondary I • 3yr.

  Hello! Let's say I do a pH test with litmus paper and my two papers turned red, what does it mean about my solution?

  Thank you!!!

  Science

  0

  1 answer
• Verified by Alloprof
  DeltaPotassium727

  Verified by Alloprof

  Secondary I • 3yr.

  Hi! How do we conduct the litmus paper test?

  Science

  0

  1 answer
• Verified by Alloprof
  DeltaPotassium727

  Verified by Alloprof

  Secondary I • 3yr.

  I don't understand the difference between temperature and heat, can someone help me?

  Science

  0

  1 answer
• Verified by Alloprof
  AdorableMoose4991

  Verified by Alloprof

  Secondary I • 3yr.

  Why does a hot object change the temperature of a cold object?

  Science

  0

  1 answer
• Verified by Alloprof
  AdorableMoose4991

  Verified by Alloprof

  Secondary I • 3yr.

  Hello,

  I have a hard time using a thermometer in the laboratory. Could you please explain how to use it?

  Thanks a lot!

  Science

  0

  1 answer
• Verified by Alloprof
  AdorableMoose4991

  Verified by Alloprof

  Secondary I • 3yr.

  I do not understand the difference between temperature and heat. Could you explain it to me please?

  Science

  0

  1 answer
• Verified by Alloprof
  QuietDragon2728

  Verified by Alloprof

  Secondary II • 3yr.

  Hello,

  I can't tell the energy source from the energy form. Can you explain to me how it works?

  Thank you for helping me!

  Science

  0

  1 answer
• Verified by Alloprof
  AdorableMoose4991

  Verified by Alloprof

  Secondary I • 3yr.

  Hi, I am having trouble reading a graduated cylinder. Could you help me?

  Science

  0

  1 answer
• Verified by Alloprof
  AdorableMoose4991

  Verified by Alloprof

  Secondary I • 3yr.

  Hi,

  How do you convert between units of volume (cubic meter, cubic millimeter, cubic decimeter, cubic centimeter, etc.)?

  I do not understand!?! 

  Thank you

  Science

  0

  1 answer
• Verified by Alloprof
  AdorableMoose4991

  Verified by Alloprof

  Secondary I • 3yr.

  Hello,

  I have to measure the volume of a solid in my lab, but I don't know how. Could you explain the techniques to me please?

  Thanks a lot!

  Science

  0

  1 answer
• Verified by Alloprof
  AdorableMoose4991

  Verified by Alloprof

  Secondary I • 3yr.

  Hi, how do you go from mL to cubic meters (m^3)? Thanks in advance!!

  Science

  0

  1 answer
• Verified by Alloprof
  LionSolidaire8599

  Verified by Alloprof

  Secondary I • 3yr.

  Hello,

  Could you explain to me how volume works? I don't really understand what it is.

  Thanks a lot!

  Science

  0

  1 answer
• Verified by Alloprof
  LionSolidaire8599

  Verified by Alloprof

  Secondary I • 3yr.

  Hello, 

  My teacher told us that our weight is not the same on Earth and on the Moon, I don't understand why, can you help me please?

  Science

  0

  1 answer
• Verified by Alloprof
  LionSolidaire8599

  Verified by Alloprof

  Secondary I • 3yr.

  Hello,

  Could you explain to me how the beam balance works in the laboratory? I have a lot of difficulty using it.

  Thanks a lot!

  Science

  0

  1 answer
• Verified by Alloprof
  LionSolidaire8599

  Verified by Alloprof

  Secondary I • 3yr.

  Can someone remind me how I convert grams (g) to kilograms (kg)?

  Thanks a lot!!!

  Science

  0

  1 answer
• Verified by Alloprof
  LionSolidaire8599

  Verified by Alloprof

  Secondary I • 3yr.

  Hello!

  How do you measure the temperature with a thermometer?

  Science

  0

  1 answer
• Verified by Alloprof
  NaiveAbafar3712

  Verified by Alloprof

  Secondary I • 3yr.

  How do you calibrate a beam scale? Either way, I don't understand why this is important.

  Science

  0

  1 answer
• Verified by Alloprof
  NaiveAbafar3712

  Verified by Alloprof

  Secondary I • 3yr.

  What is the difference between the biosphere, the hydrosphere, the lithosphere, and the atmosphere?

  Science

  0

  1 answer