Chemistry help. answers somebody help?
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Question by Big Wes: Chemistry help. answers somebody help?
Q1
Which situation would be considered pseudoscience?
Students gather to identify species of plants in their neighborhood.
A student’s lucky shirt helps him do well on a job interview.
Students successfully petition for organic food in the cafeteria.
A student tries eating all natural foods for one month to see if she has more energy.
Q2
What would be the best tool to measure the amount of matter in an object?
balance
graduated cylinder
spectroscope
scale
Q3
Which of the following could be considered a scientific statement?
“Soda A tastes better than Soda B.”
“Nuclear energy is bad because of potential radiation damage.”
“White light is composed of many colors of light.”
“You should not get rays because of the high frequency.”
Q4
Observation and experimentation have led scientists to accept a theory about the atom. This theory is called the Atomic Theory. Scientific evidence collected and observed by scientists over time suggests that the atom has a nucleus, containing protons and neutrons, and electrons that surround the nucleus.
What makes this a scientific theory?
It has been proven by several scientists independently, resulting in its being accepted as truth.
It is based on the beliefs and opinions of the majority of the scientific community.
It is an observation of the natural world that has been proven as fact.
It is the best explanation that scientists can offer, based on many scientific investigations.
Q5
Which of the following best represents potential energy being converted to kinetic energy?
A roller coaster starts at the top of a hill and then rolls down the hill.
A pitcher throws a baseball, and then the batter hits a homerun.
A man jogs around the block and then stops to drink an energy drink.
A woman peddles her bicycle across town and back again.
Q 6
Kati was in the kitchen when she heard a crash. She went into her bedroom and found her window broken and a baseball lying on the ground. Kati said “this baseball broke my window.”
This statement is an
inference because she is blaming someone else for the broken window.
inference because she drew a conclusion based on evidence.
observation because she heard the crash before she came into the room.
observation because she can see the evidence
Question 7
Which of the following is an example of a scientific theory?
Scientists use three mathematical laws to predict the movement of planets in the solar system.
Scientists observe the effect of climate changes on plants and primary producers living in the ocean.
Scientists use the relationship between the DNA of various species to estimate how long ago they diverged evolutionarily from each other.
Scientists agree that there is an amount of attraction between any two objects, called gravity, and can describe the attraction in mathematical terms.
Q8
The atoms and molecules in a liquid are in constant motion. As temperature decreases, what is true of the particles in the liquid?
the rate of particle movement decreases
the distance between the particles decreases
the attraction between the particles decreases
the potential energy of the particles decreases
Question 9
Convert 238 cm to the unit km.
0.00238 km
0.238 km
2.38 x 105 km
2.38 x 107 km
Question 10 (Multiple Choice Worth 2 points)
If you are using the unit Kelvin, you are measuring the average
kinetic energy of molecules.
rate of reaction of particles.
mass of ionic compounds.
volume of a sample of gas.
Best answer:
Answer by TheAnvil
Hah. How about you at least try to do your own work by yourself first. Then ask for assistance when you get stuck.
Give your answer to this question below!
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- Observation and experimentation have led scientists to accept a theory about the atom This theory is called the Atomic Theory Scientific evidence collected and observed by scientists over time suggests that the atom has a nucleus containing protons and ne
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