Climate change

Question 1

When did COP26 happen and what were the outcomes of this meeting?

Answer 1

COP 26 happened in 1978 and it was decided to stop producing ODS, which allowed the ozone layer to heal a bit. It is called the Montreal protocol and was a global agreement.

Question 2

What does ODS stand for?

Answer 2

Ozone depleting substances

Question 3

What are CFCs and what does it stand for?

Answer 3

It is an abbreviation of the word chlorofluorocarbon. CFCs are compounds that are broken up when hit by UV light, which makes them release chloride, which destroys ozone.

Question 4

Definition of compound

Answer 4

substance made of two or more types of atom chemically joined in a fixed ratio

Question 5

What is a molecule?

Answer 5

particle

Question 6

What is a mixture?

Answer 6

Different things that are jumbled up together.

Question 7

What are the 8 life processes?

Answer 7

Movement
Respiration
Sensitivity

Control

Growth
Reproduction
Excretion
Nutrition

Question 8

Word equation for respiration

Answer 8

Glucose + oxygen -> water and carbon dioxide(and releases energy)

C6 H12 O6 + O2 -> 6H2O + 6CO2

Question 9

Word equation for Photosynthesis

Answer 9

heat energy
Water and Carbon dioxide —————> glucose and oxygen
(Opposite of respiration)

Question 10

Chemical symbol for oxygen and ozone and how they merge together.

Answer 10

Oxygen is O(small 2 at the bottom)
Ozone is O(small 3 at the bottom)
With UV light, 2 Ozone make 3 oxygen and using the energy again, 3 oxygen makes 2 Ozone, wasting UV light energy.

Question 11

Troposphere

Answer 11

0-10 km over the Earth’s surface. Contains humans and 99percent of water and weather. Temperature ranges from -50 to 50 degrees celcius usually.

Question 12

Stratosphere

Answer 12

10-50 km above Earth. Temperatures usually around -15 degrees celcius. There are planes in this region.

Question 13

Mesosphere

Answer 13

50-80km above the earth. Temperatures usually around -100 degrees celcius. Burning stars are occasionally found in this layer.

Question 14

Thermosphere

Answer 14

500-1000 km above the Earth. Temperature around 200 degrees celcius. In this layer, meteorites burn.

Question 15

Exosphere

Answer 15

100-1000 km above the earth’s surface. Temperatures around 0-1700 degrees celcius. Satellites and spaceships are in this area.

Question 16

Oxygen

Answer 16

21% of it in the air 0(small 2)

Question 17

Carbon dioxide

Answer 17

0.04% of it in the air CO(small 2)

Question 18

Nitrogen

Answer 18

Makes up 78% of air. N(small 2). Relatively unreactive.

Question 19

Hydrogen

Answer 19

Not in the air. H(small 2) Reacts with other substances when they burn.