BIOLOGY - Carbon-14 is a radioisotope of carbon that has a half-life of about 5,730 years. A geologist is using carbon-14 dating on charcoal samples to find the age of ancient forest fires. Match the approximate age to each charcoal sample in the following two questions. Charcoal Sample #1 has 50% of its carbon-14 remaining.
What is the approximate age of Charcoal Sample #1?
Group of answer choices:
A: 12000 years old
B: 3000 years old
C: 6000 years old
D: 18000 years old



Charcoal Sample #2 has 6% of its carbon-14 remaining.

What is the approximate age of Charcoal Sample #2?
Group of answer choices
A: 18000 years old
B: 6000 years old
C: 24000 years old
D: 12000 years old

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.

measuring physical properties lab reportinstructions: in the physical properties lab, you will test the physical properties of different building materials in order to pick the appropriate materials for a new home in tiny world. record your observations and test measurements in the lab report below. youwill submit your completed report.name and title: lyric lawton, mr.herbert, 10/13/17, physical properties lab. objective(s): i need to parvus build his house out of the right material, so he will stay cool in the mountains.hypothesis: if we use wood to build the roof of the house, then the temperature inside the house will remain cooler.if we use clay brick to build the walls and floors of the house, then the temperature inside the house will remain cooler.if we use aluminium to bring electricity into the home, then it will allow electricity to flow into the home at a faster rate.if we use iron to construct the latches on the windows and doors, then the magnetism will keep the latches secure.

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101