1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
strojnjashka [21]
3 years ago
5

Which is a closed system.a tree, a human ,a clock , or a car

Biology
1 answer:
melomori [17]3 years ago
4 0
A closed system is a system that makes no physical or chemical exchanges with its environment. Of these systems provided as choices (tree, human, clock, car), only a clock does not make exchanges with the environment, except for energy.
Therefore, of that list, only a clock would be a closed system.
Hope that helped! =)
You might be interested in
What country owns the Prince Edward Islands? a. United States b. England c. France d. South Africa
Anuta_ua [19.1K]

The correct answer is option D, South Africa

Prince Edward Islands is found in the South Africa in the sub Antarctic Indian Ocean.


8 0
3 years ago
Give the atomic number, electron configuration and the number of valence electron if the following elements:
marishachu [46]

Answer:

Atomic number: 13

Electron Configuration:[NE] 3s²3p¹

Valence electron: 3

5 0
2 years ago
Every year a rice farmer collects his crops and burns the soil when he is done once the soil is enriched with debris he replants
brilliants [131]

Every year the farmer was taking care of his ice field, keep it clean and clear of all the unnecessary shrubs and then reuse the debris to fertile the soil again and then grow rice again. But since he fell sick, there is no one to take care of his rice field which will leads to the growth of unnecessary plants and weeds in it.

There will grow wild plants and shrubs which will contaminate the rice field.


5 0
3 years ago
Scientists once believed that Tyrannosaurus rex dragged its tail along the ground. Today, they know that T. rex did not drag its
Dima020 [189]
<span>The correct answer is d. the idea that T. rex held its tail aloft was supported by the studies of many scientists. This is how science works, things are discovered by having members of the scientific community do experiments and come to the same conclusion. Many of them confirmed this theory and a concensus was established.</span>
3 0
3 years ago
Read 2 more answers
What means acid rain?<br> What causes acid rain?<br> What are the effects of acid rain?
AlexFokin [52]
Acid rain can be caused by factors and there chemicals in the air
Acid rain effects- getting into our under ground waters, the animals might get sick from the acid rain, fish might die, animal health, and human health when it gets in our drinking water
Acid rain-meaning that it has elevated levels of hydrogen ions. is a rain or any other form of precipitation that is unusually acidic.
Hope this helps have a nice day

5 0
3 years ago
Other questions:
  • What part of cellular respiration is affected by shikonin
    14·1 answer
  • A student notices long, wispy clouds in the sky. which inference is the student most justified in making?
    10·1 answer
  • 1. Heat always moves from an object of
    6·2 answers
  • Which term indicates the style of reasoning that uses data to form a conclusion?
    11·1 answer
  • Which of these organisms does not need a digestive system because it produces its own food? A)cactus B)bee C)tiger D)dinosaur
    10·2 answers
  • Please help me fast its science which science is the study of living organisms
    15·1 answer
  • Select all of the answers that apply. If global warming were to raise temperatures 1.5°C to 4.5°C, what would most-likely happen
    6·2 answers
  • A division is always associated with _____.
    8·2 answers
  • Which of the following does not happen when a cell divides?
    10·1 answer
  • Environments are made up of living (biotic) and nonliving (abiotic) factors,
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!