Chemistry

Recently Asked Questions In Chemistry

Question
ssagnmen
x
tps://г03.core.learn.edgenuity.com/Player/
pring Q3 2023
ELA 1 Essa X Q email - Set X G Gmail
X
OPS X rOs.core.le X
Which health decisions can decrease the risk of non-communicable diseases? Check all that apply.
never using tobacco products
not drinking alcohol
eating a healthy diet
exercising regularly
I limiting exposure to ultraviolet light
I eating a diet high in fats and sugars
visiting the doctor
Done
) Intro
Answer

The health decisions that can decrease the risk of non-communicable diseases are: never using tobacco products, eating a healthy diet, exercising regularly, and limiting exposure to ultraviolet light.

Download to view full explanation
Non-communicable diseases are chronic diseases that are not caused by infectious agents and cannot be transmitted from one person to another. These diseases are often...
Question
The placenta, umbilical cord, and other membranes are detached and expelled during the stage of birth.
O third
O fourth
O second
O first
Answer

Fourth

Download to view full explanation
The fourth stage of birth is the expulsion stage, during which the placenta, umbilical cord, and other membranes are detached and expelled...
Question
14. The two main items
* 1 poir
addressed in Antigua and
Barbuda's Constitution are:
The structure of government and
fundamental rights;
The structure of government and
rights of the police;
The role of the Caw...
Answer

The two main items addressed in Antigua and Barbuda's Constitution are: the structure of government and fundamental rights, and the role of the Caw.

Download to view full explanation
Antigua and Barbuda's Constitution addresses two main items: the structure of government and fundamental rights, and the role of the Caw...
Question
Are/were viruses:(See page: 71spe)
A) The most abundant form of life on earth?
B) Discovered before bacteria?
C) Grown in animals in the laboratory?
D) The cause of all human disease?
Answer

A) No, B) No, C) Yes, D) No.

Question
After the German capture of the Crimea, Hitler decided to invade Stalingrad, a major
O industrial center
O oil-producing area
O agricultural region
Answer

oil-producing area.

Download to view full explanation
Yes, Hitler decided to invade Stalingrad because it was a major oil-producing area. The city was strategically located on the Volga River,...
Question
OR THIS UNIT, YOU MAY SEE THE CORRECT ANSWERS FROM THE QUIZ TO ASSIST YOU ON YOUR
ETAKES. MAKE SURE THAT YOU LEARN FROM YOUR 'MISTAKES' ON THE LEARNING CHECK, IMPRE
OUR NOTES, AND REALLY LEARN THE MATERIAL SO THAT YOU CAN SCORE WELL ON THE FINAL U
ENCHMARK EXAM IN A FEW DAYS. YOU ARE NOT ALLOWED ANY RETAKES ON THE FINAL UNIT
ENCHMARK EXAM.
Question 1
1 pts
What is Albert Einstein's contribution to the understanding of nuclear energy?
• He proposed that matter can be converted to energy and vice versa.
• He first discovered that nuclear-reaction products are lighter than the reactants.
He developed the use of nuclear reactions to generate electricity.
He demonstrated that a uranium nucleus splits and releases neutrons.
Answer

He proposed that matter can be converted to energy and vice versa.

Download to view full explanation
Albert Einstein's most famous contribution to the understanding of nuclear energy is his famous equation E=mc², which states that matter and energy are interchangeable...
Question
Mercutio challenges Tybalt to a fight because
Answer

Mercutio challenges Tybalt to a fight because he is angered by Tybalt's insults towards Romeo.

Download to view full explanation
Mercutio is a close friend of Romeo and is angered by Tybalt's insults towards Romeo. He challenges Tybalt to a fight in...
Question
SC-GB2-18-AA The diagram below shows how DNA barcoding
is done using a plant sample. Which of the following BEST
explains what happens in step W?
mole ora
STEP W
STEP X
STEP Z
STEP Y
• a. Extraction of its chloroplast genome.
• b. Amplification of targeted genes/regions using polymerase chain
reaction.
O c. The DNA fragments from PCR are cleaned to remove buffer salts
or protein contaminants and then sequenced.
• d. Gel electrophoresis is used to check the size of the copied DNA
fragments and ensure there is plenty of good-quality DNA.
Neyt nage
Answer

The BEST explanation for step W is b. Amplification of targeted genes/regions using polymerase chain reaction.

Download to view full explanation
In step W, the DNA sample is subjected to PCR (polymerase chain reaction) which is a technique used to amplify or make multiple copies...
Question
MARK FOR REVIEW
Question 39 of 50
A food handler who is throwing out garbage in an outdoor dumpster must
ecure the garbage bag before throwing it in.
leave the lid open for easy access.
close the dumpster lid after throwing away the garbage.
make sure the garbage bag falls below the rim of the dumpster.
QUESTION/ANSWER RE
Answer

Close the dumpster lid after throwing away the garbage.

Download to view full explanation
A food handler must close the dumpster lid after throwing away the garbage in order to ensure that the garbage is properly contained and does not attract pests or...
Question
Which statement about the fossil record is correct?
A Extinction is a common event but is rarely seen in the fossil record.
B Extinction is a rare event and is rarely seen in the fossil record.
C Most species that have lived on Earth are still living.
D
Most species that have lived on Earth are now extinct.
Answer

D Most species that have lived on Earth are now extinct.

Download to view full explanation
The fossil record is a record of the species that have lived on Earth in the past. It shows that most species that have lived on Earth are now...
Solve any homework question FREE with our app, NO PAYMENT required!