Problem: The properties of matter depend on the types of atoms that matter is made of. Matter can exist in two forms. It can be a pure substance. This means it is not mixed with anything. It can also be a combination of different substances. This means it can be a mix of different types of atoms. You may recall that atoms differ based on the numbers of protons they contain. Some atoms contain only one proton such as Hydrogen. Other atoms contain many protons. There are many types of atoms. For example, Helium has two protons. An Oxygen atom has eight. Water is composed of a two types of atoms. Water is made of two Hydrogen atoms and one Oxygen atoms. There are only so many types of atoms. These atoms can be mixed into an almost limitless amount of substances. So what do we call a substance that has only a single type of atom?

Question: "What are the two forms of matter?"

Answer: "A pure substance, or a mixture of substances"

OPTIONS:
- no
- yes
Answer: yes

Problem: The highest point of a wave is the crest. The lowest point is the trough. The vertical distance between a crest and a trough is the height of the wave. Wave height is also called amplitude. The horizontal distance between two crests is the wavelength. Both amplitude and wavelength are measures of wave size. The size of an ocean wave depends on how fast, over how great a distance, and how long the wind blows. The greater each of these factors is, the bigger a wave will be. Some of the biggest waves occur with hurricanes. A hurricane is a storm that forms over the ocean. Its winds may blow more than 150 miles per hour! The winds also travel over long distances and may last for many days.

Question: "Other factors being equal, why would an ocean wave be larger if the wind were blowing 150 miles per hour than if it the wind were blowing 100 miles per hour?"

Answer: "Because the faster wind speed will cause the wave to be larger than a slower wind speed"

OPTIONS:
- no
- yes
Answer: yes

Problem: His exile lasted nearly a year and a half. Long before that time there had come a reaction in his favour. The new consuls were well disposed towards him; Clodius's insolence had already disgusted Pompey; Caesar was absent with his legions in Gaul; his own friends, who had all along been active in his favour (though in his querulous mood he accused them of apathy) took advantage of the change, his generous rival Hortensius being amongst the most active; and all the frantic violence of Clodius and his party served only to delay for a while the return which they could not prevent. A motion for his recall was carried at last by an immense majority. Cicero had one remarkable ally on that occasion. On one of the days when the Senate was known to be discussing his recall, the 'Andromache' of Ennius was being played in the theatre. The popular actor Esop, whose name has come down to us in conjunction with that of Roscius, was playing the principal character. The great orator had been his pupil, and was evidently regarded by him as a personal friend. With all the force of his consummate art, he threw into Andromache's lament for her absent father his own feelings for Cicero. The words in the part were strikingly appropriate, and he did not hesitate to insert a phrase or two of his own when he came to speak of the man

Question: "How long did his exile last before a recall was carried by an immense majority?"

Answer: "Three years"

OPTIONS:
- no
- yes
Answer:
no