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Tcecarenko [31]
3 years ago
8

PLZ HELP

Biology
1 answer:
quester [9]3 years ago
4 0
The answer is b. I am not sure exactly how to explain this, but it fits in much better with that question. I hope this could help you!
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Which of these is NOT an example of a pure substance? A a tablet of the element known as calcium
11111nata11111 [884]

Answer:

a glass of muddy water

Explanation:

Pure substances contain only one element or compound.

Calcium is one element so it is a pure substance. Ice and water have the same molecular structure, so it is a pure substance. Aluminum oxide is a chemically pure compound.

The only example that is not a pure substance is muddy water due to the multiple components of mud mixing with the components of water.

Hope that helps.

7 0
3 years ago
Sound waves travel through gas liquid and solids A) True B) False
Novay_Z [31]

Answer:

True.

Explanation:

  • Sound is a form of Energy that produces a sensation of hearing in our ears.
  • Sound is produced as a result of vibration produced in a body.
  • Sound energy is transmitted from one place o other place by wave motion.
  • When a body vibrates, the particles of medium surrounding it starts vibrating about their mean position.
  • During vibration, they collide with the surrounding particle and transfer some energy to them.
  • They then start vibrating faster and transferring  energy to the next surrounding particle. This process continues till the vibration reaches a person ear.
  • Thus, particles are an important factor in propagation of sound.
  • Sound cannot travel in vacuum.
  • It requires a medium to travel from one point to another.
  • A sound can travel in all medium, solids, liquids and gases as all of these have particles.
  • The speed of sound is highest in solids and lowest in gases as the inter molecular space is largest in gases and smallest  in solids.
4 0
3 years ago
How does the digestive system interact<br> with other body systemms?
wolverine [178]

Answer:

(1) Digestive System gets nutrients (good) from food and hands it over to the blood and Circulatory System then carries those nutrients where they need to go. (2) Filters out waste from food and pushes it through intestines and out the body (and you know how and where it gets out).

Explanation:

6 0
3 years ago
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Answer:

anyone can join

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In aquatic ecosystems, which zone does not receive light?
gizmo_the_mogwai [7]

C. aphotic zone

... ... ...

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