Week 2 Key Facts

Question 1

What is homeostasis?

Answer 1

Maintaining a stable internal environment

Question 2

Where are hormones made?

Answer 2

Endocrine glands

Question 3

How are hormones transported to the target organs?

Answer 3

In the blood

Question 4

What causes type 1 diabetes?

Answer 4

Lack of insulin made in the body

Question 5

What causes type 2 diabetes?

Answer 5

Insulin resistance

Question 6

Where do we extract most metals from?

Answer 6

Ores found in the earth’s crust

Question 7

How are unreactive metals found in the earth’s crust?

Answer 7

Uncombined as pure metals

Question 8

How are most ores found in the ground?

Answer 8

Metal Oxides

Question 9

What is removed to extract an ore?

Answer 9

Oxygen

Question 10

What is reduction?

Answer 10

The removal of oxygen

Question 11

What is corrosion?

Answer 11

Rusting. Adding oxygen to a metal

Question 12

What process amkes crude oil useful?

Answer 12

Fractional distillation

Question 13

What is gas used for?

Answer 13

Heating and cooking

Question 14

What is petrol used for?

Answer 14

Fuel in cars

Question 15

What is kerosene used for?

Answer 15

Fuel in planes

Question 16

What is diesel used for?

Answer 16

Fuel in cars and trains

Question 17

What is bitumen used for?

Answer 17

Tar on the roads

Question 18

Name a biofuel

Answer 18

Ethanol

Question 19

How is ethanol made?

Answer 19

From sugar cane or sugar beet

Question 20

Name an advantage of biofuesl

Answer 20

They reduce the demand for petrol

Question 21

How do fuel cells make energy?

Answer 21

Combining oxygen and hydrogen to make water

Question 22

What is ultrasound?

Answer 22

Sound with a frequency of greater than 20000 Hertz

Question 23

What is infrasound?

Answer 23

Sound with a frequency of less than 20 hertz