Answer:
option A is the ans i think so
Answer:
The salt and water will pass through the filter paper while the large, undissolved pieces of sand will be trapped by the filter paper. The liquid that passes through the filter paper and is collected in the beaker is called the filtrate.
Explanation:
If you look on google it will give you the answer: Salt.
Answer:
B. The data were reproduced by other scientists using the same experimental methods.
Explanation:
One of the features of reliable experimental results is their reproducibility — other scientists must be able to produce them.
A. is wrong. An experiment that is designed to prove a hypothesis is biased.
C. is wrong. A conclusion based on a single experiment is suggestive but not conclusive. It takes a number of experiments to provide a strong statistical relation between the variables.
D. is wrong. The data may support a conclusion that the they reached using logic and critical thinking, but there may still be a flaw in the thinking, which other scientists can point out.
<span>No. Radiocarbon dating has an effective range to only about 62,000 years ago (and the further back you go, the higher your error will be). The fossils in the shale are much older than that, so you can be sure that the leaves are not recent enough to be dated that way.</span>
Haploid number of chromosomes and gamete cells.