Climate Change Facts and Human Evolution Evidence

What Should We Do About Climate Change?

Section 1: Climate Change Facts

• 1.a) FALSE: In Australia, peak energy demand occurs on hot summer days.
• 1.b) TRUE: Ninety-seven percent of scientists agree that climate change is happening.

Section 2: Energy Consumption and Skepticism

• 2.a) We could limit our energy consumption.
• 2.b) Perhaps [skeptics risk great financial loss] if people find out about climate change and modify their use of energy.

Section 3: Vocabulary Review

Words to review: providing, peak, because, fix.

Section 4: Grammar Review

• 4.a) Which, in
• 4.b) Was cut, to
• 4.c) Took, driving
• 4.d) Why people should use less energy.

A Relative Difference: Humans and Apes

Section 1: Primate Rights and Population

• 1.a) FALSE: "This similarity has led chimp expert Dr. Jane Goodall to call for human rights to be extended to chimpanzees."
• 1.b) FALSE: "Development and destruction of their natural habitats, along with commercial hunting for food, have cut their numbers from two million chimpanzees at the turn of the last century to less than one tenth of that now."

Section 2: Evidence of Common Ancestry

• 2.a) Yes, there is not only paleontological evidence which shows the existence of a great diversity of ape-like, human-like creatures millions of years ago, but also genetic similarities that prove our common ancestry.
• 2.b) The most important distinction has been the development of language, which has had important consequences in our human evolution.

Section 3: Vocabulary Review

Words to review: link, skull, leap forward, seemingly.

Section 4: Sentence Structure Practice

• 4.a) If you don't ask him a question, he won't speak to you.
• 4.b) She told me that I had to do it at once.
• 4.c) The exercise is too difficult for us to do.
• 4.d) The crime is being investigated by some policemen.

Do Aliens Really Exist?

Section 1: Sightings and Reports

• 1.a) TRUE: This theory is supported by many reported alien sightings.
• 1.b) FALSE: Two brothers in Chile said that they saw a humanoid creature about 80 cm tall, shiny and red, who resembled a child wearing a driver's suit.

Section 2: Descriptions and Fermi's Theory

• 2.a) They are described as green “people,” with physical characteristics similar to humans, such as arms and legs; others say that they look like tiny glistening red creatures.
• 2.b) Enrico Fermi proposed a theory in which he explains we cannot affirm that aliens exist, given that we have no proof of it; we don't even have any evidence of contact with these beings.

Section 3: Vocabulary Review

Words to review: Depicted, Nowadays, Vanished, just.

Section 4: Grammar Review

• 4.a) Hadn’t believed, to
• 4.b) Whose, by
• 4.c) Much, was given
• 4.d) Of, thought.