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Stells [14]
2 years ago
8

What is the hallmark of a chemical change?

Biology
1 answer:
Oksi-84 [34.3K]2 years ago
4 0
There are five signs that indicate a chemical reaction has occurred: odor, energy change, gas bubbles, precipitate formation, and color change. When any of these changes occur, the reaction is irreversible and cannot be undone.
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Why is scientific knowledge more reliable than other types of knowledge?
RUDIKE [14]

Answer:

D. Because science only uses facts that are proven 100% true through the use of  variables.

Explanation:

All the knowledge we read is science books are not merely some observed facts but the result of a systematic scientific methodology through which facts are tested. Science only gives us that knowledge as facts which is  proven 100% true through the use of  variables.For example: if a scientist has studied the effect of salt stress on the growth of plants and he got the results in form of graphs which show that growth of salt treated plants in very less than normal plants. Then he needs to draw conclusion after consulting relevant previous experiments and say that salt stress hinders growth and why? with reasonable logic.

Variables are the things hat he changes like environmental conditions in previous example to see that in changed conditions plant is showing changed behavior. This way a scientist strengthens his results. Therefore, we can say that whatever knowledge we get through science is proven 100% true through the use of  variables.

Hope it helps!

8 0
3 years ago
Which statement correctly describes a feature of carrying capacity? A. can only change if the population experiences migration B
svet-max [94.6K]

The answer is; E


With environmental changes, the carrying capacity can either increase or decrease. It is important to note that the carrying capacity is the number of individuals of a species that a habitat can sustain indefinitely.  With favorable environmental conditions, the carrying capacity increases while unfavorable environmental conditions decrease the carrying capacity.


6 0
3 years ago
Read 2 more answers
Which 3 organisms reproduce sexually
anzhelika [568]

Jellyfish, Komodo dragon, & bacterium

8 0
3 years ago
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Explain some of the processes involved in a scientific investigation.
Dominik [7]

Answer:

The steps involves making hypothesis, deriving predictions from the logical consequences and then carrying out experiments based on those predictions.

Explanation:

Step 1: make a observation .

Step 2: Formulate a statement or question.

Step 3: Form  the hypothesis .

Step 4: make a prediction based on the hypothesis.

Step 5: test the hypothesis whether its true or not.

Step 6: use the results to conclude the experiment.

8 0
3 years ago
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4. Sunlight, water, and carbon dioxide are environmental factors that affect the rate of photosynthesis?
Anton [14]

Answer:1.Yes plants take in carbon dioxide for "air" they need water to keep hydrated sunlight helps it make food.

2.Then the entire process of photosynthesis would crash. If no carbon dioxide the plant would not be able to breath and die, No water and it dies of thrist and no sunlight and the plant shivers and dies.

8 0
3 years ago
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