Unit B: Section 4.0 Flashcards Preview

Grade 8: Science > Unit B: Section 4.0 > Flashcards

Flashcards in Unit B: Section 4.0 Deck (20):
1

What did Edward Jenner do to stop people from getting small pox?

He infected people with cow pox on purpose to make them immune. Creating the first vaccination

2

Who was the first person to discover living micro-organisms?

Louis Pasteur

3

Who discovered that germs caused infectious diseases?

Louis Pasteur

4

Who introduced the practice of cleanliness and sterilization?

Joseph Lister

5

How did Louis Pasteur get rid of germs?

By heating up substances to 60 degrees

6

Why could early sailors only bring non-perishable foods?

So they wouldn't spoil

7

Why did sailors get scurvy?

Because they could only bring non-perishable foods and that meant no fruits that were rich in vitamin c. Therefor they got vitamin c deficiency

8

What are the contents of a cigarette?

Tar, carbon monoxide, and nicotine

9

What is Tar?

A dark sticky substance that forms when a cigarette burns. When a smoker inhales this it settles on the respiratory organs

10

What is carbon monoxide?

A colorless odorless gas that is released when a cigarette burns. When a smoker inhales this it get into their system and makes their heart beat faster.

11

What is nicotine?

Nicotine a speeds up the heart and raises blood pressure. It is also addictive.

12

What is bronchitis?

Bronchitis is a disease that occurs when build up of substances on the bronchi cause them to become narrower. Giving them a hard time breath

13

What is emphysema?

Emphysema occurs when cigarette smoke damages lung tissue.

14

How many chemicals in a cigarette cause cancer?

40 of the 400

15

What is cholesterol?

What the body converts fat into

16

What is the build up of cholesterol in the arteries called?

Atherosclerosis

17

How does atherosclerosis affect the body?

It makes the arteries thinner making the heart pump more

18

What are stomach ulcers?

When the stomach doesn't produce enough mucus and stomach basically eats itself.

19

What causes stomach ulcers?

H.pylori. I can't be digested.

20

What did Edward Jenner notice about small pox?

People who got cow pox almost never got small pox