Chemistry Middle School

Which statement correctly describes Earth’s magnetic field?


A) A compass can lead a hiker to the geographic North Pole.

B) The magnetic pole near the South Pole is a north pole.

C) Compasses point toward a magnetic pole that is a north pole.

D) Field lines circle Earth from east to west.

Answers

Answer 1

Answer:

B) The magnetic pole near the South Pole is a north pole.

Explanation:

The north pole on the compass is the geographical South Pole.

Hope it helps.

Answer 2

Answer:

The answer is B.

Explanation:

Related Questions

The correct name for molecule I is

Molecule I

I
|
CH3-CH-CH3


a. Iodopropane

b. 2-iodylpropane

c. 2-iodopropane

D. Propyliodine



14. The correct name for molecule III is


Molecule III

F
|
C= CH
——-


a. 2-Fluoroeth 1-yne

b. Fluoroethyne

C. Fluoroethene

D. Methylfluorine



16. Synthetic chlorinated hydrocarbons such as dioxins and furans are usually greater pollution hazard then natural organic substances because synthetic hydrocarbons are

a. More volatile

b. Less water soluble

C. Less Biodegradable

D. More chemically reactive



Question 17.

Sources of pollutants

1. High temperature combustion

2. Pulp and paper industry


3. Pesticides

4. Sour gas plants


Match each source of pollutant as numbered above with its pollutant as listed below. Use each number only once



17. Dioxins/furans


18. SO2(g)

19. Nox(g)

20. Phosphates


Answers

Answer:

c). 2-iodopropane

14) C). Fluoroethene

16) D). More chemically reactive

17) 1). High temperature combustion  - Dioxins/furans

2). Pulp and paper industry  - SO2(g)

3). Pesticides  - Phosphates

4). Sour gas plants - Nox(g)

Explanation:

The correct name for molecule I would be '2-iodopropane' where the number 2 reflects the position of iodine. There are three carbons and 8 hydrogen atoms which reflect that it is an alkane compound. In the given carbon chain. In this chain of three carbons, iodine is present on the second carbon. Therefore, option C is the correct answer.

14). The appropriate name for molecule III exemplifies Fluoroethene as it consists of two carbons due to which it belongs to the 'ethane' group and it bears the prefix 'fluoro as it belongs to fluorine group and the suffix '-ene' due to double bond.

16). Synthetic hydrocarbons are 'more chemically reactive' and therefore, it generates greenhouse gases and leads to climate change, global warming, depletion of the ozone layer, etc.

17). 1). Dioxins are generated as a result of high-temperature combustion processes like commercial waste incineration or burning of fuels.

2). Pulp and paper industry releases various gases like nitrogen oxide, sulfur dioxide SO2(g), carbon dioxide, etc.

3). Phosphate is the pollutant released from pesticides that badly affects the fertility of the soil.

4). Nox(g) nitrogen oxide released by sour gas plants and coal-fired emissions is a major contributor to increased greenhouses gases and global warming.

What qualifications do you need to be a research scientist?
A. High IQ
B. College degree
C. High school diploma
D. Ph.D

Answers

Answer:

Ph.D

Explanation:

For the most part, research scientists need a bachelor's degree in a highly associated field. A master's degree or a doctorate is frequently expected.

Other Questions
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