C5: Materials and Everyday Chemistry Flashcards Preview

DS 8E Science 3 > C5: Materials and Everyday Chemistry > Flashcards

Flashcards in C5: Materials and Everyday Chemistry Deck (15)
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1
Q

What is the word equation for photosynthesis?

A

Carbon Dioxide + Water + Light —> Glucose + Oxygen

2
Q

What does a ‘metabolic pathway’ mean and give an example of one

A

A series of chemical reactions occurring within a cell. For example, cellular respiration.

3
Q

Give 5 features of a sustainable house and a reason why it is sustainable.

A

Motion sensor lighting: This means that the lights will only be on when people are inside the house, reducing energy usage.

Triple Glazed Windows: This will reduce heat loss through the windows, meaning that less energy will be required to heat the house, reducing energy usage.

Faucet Aerator: Adds air to water meaning that less water is used, reducing water waste.

Gas Condensing Boiler: An incredibly efficient boiler that uses transforms 90% of the energy used into heat, reducing energy consumption.

Insulation: Heats home quicker, less heat is loss, reducing energy consumption.

4
Q

What are some of the drawbacks of sustainability?

A

Extra cost

Require sacrifice

Many houses are currently inefficient and are difficult to make sustainable

Some people don’t believe in climate change or that sustainability is necessary.

5
Q

Identify a trend in this data

A

Slow and steady increase up to 1950. Much sharper rise (still steady / straight line) since then

6
Q

What is the word equation for aerobic respiration?

A

Glucose + Oxygen –> Carbon Dioxide + Water + (Energy)

7
Q

State the equation for anaerobic respiration (fermentation) in Yeast.

A

Glucose –> Ethanol + Carbon Dioxide + (small amount of energy)

8
Q

How are respiration and photosynthesis linked in a metabolic pathway (in plants)?

A

Photosynthesis must occur first to produce glucose. The glucose can the be broken down and energy released by respiration.

Respiration can’t happen before photosynthesis in this metabolic pathway.

9
Q

Write a word equation for the complete combustion of methane

A

methane + oxygen –> carbon dioxide + water

10
Q

Why do particulates cause global dimming?

A

The particulates, as solid tiny particles, reflect sunlight away from the earth so causes global dimming

11
Q

How is acid rain formed?

A

Sulphur dioxide and nitrogen oxides react with oxygen in the air and dissolves in water to produce acid rain

12
Q

How can we reduce the amount of sulphur dioxide being produced? Name 2 ways

A

•remove the sulphur from the fuel before you burn it •remove sulphur dioxide from the waste gases produced from power stations

13
Q

Define sustainable development.

A

Managing the way we use resources so that the needs of our growing population can be met without destroying things for future generations.

14
Q

What does conservation mean?

A

Protecting species (of plants and animals) and habitats

15
Q

State 3 different conservation schemes

A

Captive Breeding Programs

Fishing Quotas

Protected Areas e.g. National Parks