Gases can be chemically active or inactive. This means that a gas either reacts or does not react when combined with other elements.A definition of a noble gas is a gas that does not combine easily with other elements. An example of a noble gas is helium. A protective layer of helium prevents reactions with other elements such as oxygen.
Helium has a very low density. It is used daily in weather balloons to carry instruments that record temperature, humidity, and pressure readings in the atmosphere.
People with breathing problems may be treated with a mixture of helium and oxygen. Helium atoms are small and light. A helium-oxygen mixture can be pumped in and out of the lungs more easily than air. Helium-oxygen mixtures are also used in breathing tanks of deep-sea divers.

Using information from the passage, which statement is accurate?

1.A noble gas mixes well with other elements.
2.Gases usually are chemically active.
3.Helium is an example of a chemically inactive gas.
4.Helium-oxygen mixtures are used in weather balloons.

Which of the following would not affect self-image?

1. Stress involves what kinds of reactions?Hormonal
Psychological
O
Physiological
All the above

Nelson's hobby is tinkering with small appliances.Tinkering with implies that Nelson is unskilled at his hobby. You want to change the flavor of this sentence
to show that Nelson is, in fact, quite skilled at his hobby. Which of the following should you choose to
replace tinkering with so that the reader gets the right idea?
A. Fiddling with
b. Selling
C. Messing with
D. Repairing

The information looks like a paragraph, but it’s not. Can you figure out why?An Italian named Marconi invented the radio. The first radio was called a wireless. During World War II, most people got their news from listening to a radio. Today, people often listen to radio programs in their cars. Cell phones have changed the way people live. Everywhere you go these days, you see people talking on cell phones. Some people think cell phones make life more dangerous. They can cause accidents. People shouldn’t talk on their cell phones while driving a car. Watching television can be a waste of time. Many people spend many hours every day watching television. It would be better if people would talk to each other. That would be a good idea. Some of us might discover that our neighbor is more interesting than our favorite television series.

Which sentence does not contain any errors?a. Be sure to dot all your i's.

b. You don't think this is your's?
c. How many ps are in the word pepperoni?

d. Our bus company's local phone number has five 5's in a row.
b?

Who remembers the name of Lyndon johnsons dogs?A. Personal pronoun
B. Reflexive pronoun
C. Interrogative pronoun
D. Indefinite pronoun
*WHO is underlined.