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  ZenZombie9054

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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!

  Science

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  1 answer
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  QuietDragon2728

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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!!

  Science

  0

  1 answer
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  QuietDragon2728

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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?

  Science

  0

  1 answer
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  QuietDragon2728

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  Secondary II • 2yr.

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

  Science

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  1 answer
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  QuietDragon2728

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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!

  Science

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  1 answer
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  QuietDragon2728

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  Secondary II • 2yr.

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

  Science

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  1 answer
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  DeltaPotassium727

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  Secondary I • 2yr.

  At the molecular level, what explains the phase changes?

  Thanks!

  Science

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  1 answer
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  DeltaPotassium727

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  Secondary I • 2yr.

  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

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  1 answer
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  DeltaPotassium727

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  Secondary I • 2yr.

  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
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  DeltaPotassium727

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  Secondary I • 2yr.

  Hi! How do we conduct the litmus paper test?

  Science

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  1 answer
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  DeltaPotassium727

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  Secondary I • 2yr.

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

  Science

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  1 answer
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  AdorableMoose4991

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  Secondary I • 2yr.

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

  Science

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  1 answer
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  AdorableMoose4991

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  Secondary I • 2yr.

  Hello,

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

  Thanks a lot!

  Science

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  1 answer
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  AdorableMoose4991

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  Secondary I • 2yr.

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

  Science

  0

  1 answer
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  QuietDragon2728

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  Secondary II • 2yr.

  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

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  1 answer
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  AdorableMoose4991

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  Secondary I • 2yr.

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

  Science

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  1 answer
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  AdorableMoose4991

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  Secondary I • 2yr.

  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

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  1 answer
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  AdorableMoose4991

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  Secondary I • 2yr.

  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

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  1 answer
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  AdorableMoose4991

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  Secondary I • 2yr.

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

  Science

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  1 answer
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  LionSolidaire8599

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  Secondary I • 2yr.

  Hello,

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

  Thanks a lot!

  Science

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  1 answer
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  LionSolidaire8599

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  Secondary I • 2yr.

  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

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  1 answer
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  LionSolidaire8599

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  Secondary I • 2yr.

  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

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  1 answer
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  LionSolidaire8599

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  Secondary I • 2yr.

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

  Thanks a lot!!!

  Science

  0

  1 answer
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  LionSolidaire8599

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  Secondary I • 2yr.

  Hello!

  How do you measure the temperature with a thermometer?

  Science

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  1 answer
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  NaiveAbafar3712

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  Secondary I • 2yr.

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

  Science

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  1 answer
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  NaiveAbafar3712

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  Secondary I • 2yr.

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

  Science

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  1 answer
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  NaiveAbafar3712

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  Secondary I • 2yr.

  What are the visible structures in animal cells and plant cells under a microscope?

  Science

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  1 answer
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  NaiveAbafar3712

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  Secondary I • 2yr.

  Hey Alloprof,

  What is the difference between Linkage and guidance?

  Science

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  1 answer
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  NaiveAbafar3712

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  Secondary I • 2yr.

  Can you help me in the following exercise:

  "Name the different effects of forces:

  1. We push on a concrete block
  2. We pull on a rope
  3. We twist a rag
  4. We press on a plank of wood held by two blocks
  5. We tear a piece of fabric ”

  Science

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  1 answer
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  NaiveAbafar3712

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  Secondary I • 2yr.

  What is the difference between a helical motion and a rotational motion?

  Science

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  1 answer