Edlin QUIZ

Active

1

2

3

10

THE RERIAINING

55:49

Which describes the correct procedure when converting a number from scientific notation to standard notation if the

power of 10 is -10?

的

Move the decimal point to the left.

Move the decimal point to the right.

Add 20 to the number.

Subtract 20 from the number.

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

(b) which contains higher levels of vitamin b, oranges or spinach?

explanation:

you can eliminate a, c, and d because they are questions based on opinions.