Question

#1: Terry heats two different masses of substance A to different temperatures, and measures the amounts of both carbon dioxide and water produced. Which of the following is true about this experiment?

A. This experiment is uncontrolled because two gaseous products are measured.

B. This experiment is well controlled because only the mass of substance A is varied.

C. This experiment is uncontrolled because two different masses of substance A are used.

D. This experiment is well controlled because the masses of substance A and the products are varied.
**My answer: C

Answer 1

yep no control in this

Answer 2

#2: In terms of the sequence of the scientific method, what is the immediate purpose of doing an experiment?

A. asking the question

B. formulating the hypothesis

C. gathering data

D. drawing conclusions
***my answer; C. gathering data

Answer 3

#3: Which of the following describes a physical property?

A. When two substances are mixed a precipitate forms.

B. Gunpowder explodes.

C. A substance changes color when heated, but changes back when cooled.

D. A candle burns.
**My answer: C

Answer 4

(Y) right again

Answer 5

and again haha

Answer 6

so all 3 are correct???
C,C, and C???

all 3 answers are C??

Answer 7

haha yeah somehow it worked out like that

Answer 8

lol thanks :)

Answer 9

no prob :)