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
Nady [450]
3 years ago
12

Evidence of climate changes and conditions that affected early societies are gathered from _____. written records ice core sampl

es tree rings maps
Biology
1 answer:
pogonyaev3 years ago
8 0
I go with Ice Core examples since early sociteties probably didn't have Written Records or maps, and tree rings would only tell if they were fossilized. I hope this helped :)
You might be interested in
Fluid filled sacs in the knee are specifically called
antoniya [11.8K]
Fluid filled sacs in the knee are specifically called Bursa or Bursae. Bursae is plural for Bursa.
A bursa is a closed fluid filled sac that function as a gliding surface to reduce friction between tissues of the body. Knee bursitis occurs when there is irritation or inflammation in one one of the knee bursa. The procedure of removing fluid-filled sac is called bursectomy. When the bursa become infected with bacteria, this condition is called septic bursitis.
5 0
2 years ago
Wood deposits recovered from an archaeological site contain 36% of the C-14 they originally contained. How long ago did the tree
Veseljchak [2.6K]

Answer: It was obtained 8515 years ago

Explanation:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant

t = age of sample

a = let initial amount of the reactant

a - x = amount left after decay process  

a) to find the rate constant:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

t_{\frac{1}{2}}=\frac{0.693}{k}

k=\frac{0.693}{5760}=0.00012years^{-1}

b) for completion of 36% of reaction

t=\frac{2.303}{k}\log\frac{100}{36}

t=\frac{2.303}{0.00012}\log\frac{100}{36}

t = 8515 years

The time was 8515 years.

3 0
3 years ago
Which two minerals are also elements?
Iteru [2.4K]

Answer:

carbon and titanium,  hope that helps

Explanation:

5 0
2 years ago
Name one pair of rays that are opposite<br> not rays
soldi70 [24.7K]

Answer:

Rays having same endpoint E but not in the opposite directions are ED and EC. This pair of rays meet at point E having different directions.

6 0
3 years ago
What are the four factors that determine a population's growth rate?
nekit [7.7K]
Pick the one that gets to your heart
8 0
2 years ago
Read 2 more answers
Other questions:
  • Which model of eating disorders includes a "core pathology"?
    13·1 answer
  • Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. The decay r
    7·2 answers
  • What structure is attached to the nuclear envelope and lined with ribosomes?
    5·2 answers
  • 4. When considering your updated definition of human carrying capacity, are the impacts of almost 900,000 residents in SF indefi
    14·1 answer
  • Elemento vital para todas las especies que habitan el planeta
    7·1 answer
  • The correct answer to number 25 is 3 ! Why is it correct ? Explain why please !!
    11·1 answer
  • Skeletal muscle fibers Select one: a. possess striations. b. can contract but are not extensible or excitable. c. do not require
    11·1 answer
  • How does normal weather, moderate rain or snow, affect the rock cycle?
    8·1 answer
  • Tell whether the given processes occur in the mitochondria, cytoplasm, or chloroplast
    12·1 answer
  • Which theory is most widely accepted in describing the formation of our universe?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!