u and now I want you to sum up all your knowledge and to do the quiz.
1. What does the word "dinosaur" mean?
1) Scarly beast
2) Fearfully great lizard
3) Giant reptile
4) Reptile with monstrous teeth (Sir Richard Owen came up with the term "dinosaur" in 1842. In Greek "deinos" means fearfully great, and "sauros" means lizard.
2. How old do scientists currently believe the Earth is?
1) 2. 2 billion years
2) 3 billion years
3) 4. 5 billion years
4) 8. 3 billion years (Bertram Boltwood used radioactive decay in rocks to calculate the Earths age to 2. 2 billion years. Since all of the worlds rocks are recycled through plate tectonics, other methods are now used. )
3. How many genes did scientists expect to find in humans when the Human Genome Project began in 1990?
1) 1,000
2) 10,000
3) 100,000
4) 1,000,000 ( When the Human Genome Project began in 1990 scientists expected to find at least 100,000 genes in humans. Great surprise greeted the final number between 20,000 and 25,000.
4. It is impossible for a person to have blue eyes if both of his natural parents have brown eyes.
1) True
2) False (It is possible for two parents each with one recessive blue-eyed gene to pass that gene to his or her off-spring, thus producing a blue-eyed child.
5. What was celluloid, the first synthetic plastic, originally used for?
1) House hold items like combs and buttons
2) Military items like helmets
3) Film
4) Scientific research (in household items)
Did you enjoy our lesson? As for me I liked it. I want to say that youve done your work well. The lesson is over. Thank you. Good-bye!
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