How many experimental trials are needed before a hypothesis can be accepted as true ?

Answers

Answer 1
Answer: approximately, or at least the test must be repeated until 3 times, to find an accurate average and hypothesis.
Answer 2
Answer: 3 times or more because you need to have 3 trails or more to be able to explain why your hypothesis is correct!!

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Must new substances be formed when you observe a chemical property? explain

Answers

Yes. Whenever a chemical change is observed (a few examples being change in color, odor, or precipitate formation) a new substance is formed.

What device do scientists use to measure radiation

Answers

Answer:

Geiger counter

Explanation:

Came from Google.

Geiger counter is used to measure radiation

Within each Biome
how can the environment be organized into levels from complex to simple

Answers

The levels of a biome's environment can be organized as populations, species, community, and the ecosystem.

Which is an example of an atom?A)the smallest unit of Ne
B)the smallest unit of p4
C)the smallest unit of NH3
D)the smallest unit of H2O

Answers

It is A)The smallest unit of Ne 

What is called what a scientist personal opinion affects the way experimental results are reported?A. Bias
B. Classifying
C. Inductive reasoning
D. Procedure

Answers

Answer;

A. Bias

If the personal opinion of a scientist affects the way that the experimental results are reported, that is called bias.

Explanation;

-An experimenter bias, is a process where the scientists performing the research influence the results, in order to portray a certain outcome.

-Bias is among the factors that makes a qualitative research much more dependent upon experience and judgment than quantitative research.

-Bias in a research may arise from experimental errors and failure to consider all the possible variables and also when the researchers select the subjects that are more likely to generate the desired results.

The answer would be A.Bias because the scientist can form a Bias opinion based on his beliefs 

Lithium, sodium, and potassium are examples of

Answers

Answer:

The correct answer is: Alkali Metals

Explanation:

The chemical elements that belong to the group 1 of the periodic table are known as the alkali metals. The alkali metals belong to the s-block and are highly reactive in nature.

The alkali metals are lithium (chemical symbol Li), sodium (chemical symbol Na), potassium (chemical symbol K), rubidium (chemical symbol Rb), caesium (chemical symbol Cs), and francium (chemical symbol Fr).

Therefore, lithium, sodium, potassium are examples of alkali metals.

Metals in the periodic table.