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Kitty [74]
3 years ago
10

The most common of the psychoactive substances, used by 90% of americans, is __________.

Biology
1 answer:
Masteriza [31]3 years ago
5 0

The answer is caffeine. Caffeine is used as a stimulant to maintain alertness and reduce drowsiness. Caffeine is used to improve performance and most take it to allow them to continue working when they naturally feel tired or to stimulate the brain in the morning.  It is consumed in beverages such as tea, coffee, and soft drinks.






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Which of the following is a fat which thickens when reduced?
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Answer:

Pectin

Explanation:

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3 years ago
What is the average for tge following set of measurements 7.1g,9.8g,2.3g,8.5g,7.4g,5.7g,
eduard

To get an average, you must add all of the numbers together, and divide that sum by the amount of numbers there are. There are 6 number, which is what we must divide by.

7.1+9.8+2.3+8.5+7.4+5.7= 40.8\\40.8/6=6.8

6.8g is the average for the set of measurements.

4 0
3 years ago
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What is the relationship between evidence, conclusions and theories.will mark brainliest
Pie

Answer:

They are inter-related with each other.

Explanation:

There is a great relationship present between evidence, conclusions and theories because evidences are those materials due to which a hypothesis can be verified and we can draw conclusion. When we repeat the same experiment and find out the same conclusion so it becomes theory and when these theories can't change with the passage of time, it becomes law. So evidence, conclusions and theories are inter-related to each other.

5 0
4 years ago
what are you supposed to do if your teacher looses your paper and you know you turned it in but it says in the grade book missin
Likurg_2 [28]

Answer:

talk to your teacher

Explanation:

talk to your teacher about your missing assignment. they will look for it for you, but if they can't find it, you might have to redo the assignment. they might also give you an exemption on the assignment, but that's unlikely.

if you're worried about talking to them face-to-face, you could email them.

4 0
3 years ago
Which best describes how ocean ridges form?
Gemiola [76]
D. pressure from lava being pushed up from th earth adds new material to the ocean floor, creating a ridge
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