Recycling and sustainability in EV Technology - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is recycling?

Recycling is the process of collecting and processing used materials to make new products. It helps reduce waste and saves natural resources.

beginner

Why is sustainability important in electric vehicle (EV) technology?

Sustainability in EV technology means using resources wisely to reduce harm to the environment, such as lowering emissions and using recyclable materials.

intermediate

Name one common material recycled from electric vehicle batteries.

Lithium is a common material recycled from EV batteries to reduce mining and environmental impact.

beginner

How does recycling help reduce pollution?

Recycling reduces pollution by lowering the need to extract and process raw materials, which often causes air and water pollution.

intermediate

What does the term 'circular economy' mean in sustainability?

A circular economy means designing products and systems so materials are reused and recycled continuously, reducing waste and saving resources.

What is the main goal of recycling?

A To create more pollution

B To increase landfill size

C To reduce waste and save resources

D To use more raw materials

Recycling aims to reduce waste and save natural resources by reusing materials.

Which material is commonly recycled from EV batteries?

A Lithium

B Glass

C Plastic

D Wood

Lithium is a key material recycled from electric vehicle batteries.

Sustainability in EV technology helps to:

A Increase emissions

B Use more fossil fuels

C Waste resources

D Reduce environmental harm

Sustainability aims to reduce environmental harm by using resources wisely.

What does a circular economy focus on?

A Reusing and recycling materials continuously

B Increasing waste production

C Using only new raw materials

D Throwing away products after use

A circular economy focuses on reusing and recycling materials to reduce waste.

How does recycling reduce pollution?

A By increasing mining activities

B By lowering the need to extract raw materials

C By burning more waste

D By producing more plastic

Recycling reduces pollution by lowering the need to extract and process raw materials.

Explain how recycling contributes to sustainability in electric vehicle technology.

Think about how used EV parts can be reused instead of thrown away.

Describe the concept of a circular economy and why it is important for sustainability.

Imagine a system where nothing is wasted and everything is reused.

Practice

1. What is the main goal of recycling in sustainability?

easy

A. To turn old materials into new products

B. To increase the use of plastic

C. To create more waste

D. To use more energy

Solution

1. Step 1: Understand recycling purpose

   Recycling means reusing old materials to make new things.

2. Step 2: Connect recycling to sustainability

   This reduces waste and saves resources, helping the environment.

3. Final Answer:

   To turn old materials into new products -> Option A

4. Quick Check:

   Recycling = reuse materials [OK]

Hint: Recycling means reusing old stuff [OK]

Common Mistakes:

• Thinking recycling creates more waste
• Believing recycling uses more energy
• Confusing recycling with waste creation

2. Which of the following is a correct example of a sustainable action?

easy

A. Throwing all trash into one bin

B. Leaving lights on when not needed

C. Cutting down trees without planting new ones

D. Using reusable bags instead of plastic bags

Solution

1. Step 1: Identify sustainable actions

   Sustainable actions save resources and reduce harm to nature.

2. Step 2: Evaluate each option

   Using reusable bags reduces plastic waste, which is sustainable.

3. Final Answer:

   Using reusable bags instead of plastic bags -> Option D

4. Quick Check:

   Reusable bags = sustainable choice [OK]

Hint: Choose actions that save resources [OK]

Common Mistakes:

• Thinking all trash in one bin is sustainable
• Believing wasting electricity is sustainable
• Ignoring tree planting importance

3. Consider this code snippet representing waste sorting:

bins = {'plastic': 5, 'paper': 3, 'glass': 2}
recycled = {k: v*2 for k, v in bins.items() if v > 2}
print(recycled)

What will be the output?

medium

A. {'plastic': 10, 'paper': 6}

B. {'plastic': 10, 'paper': 6, 'glass': 4}

C. {'plastic': 5, 'paper': 3}

D. {'glass': 4}

Solution

1. Step 1: Understand dictionary comprehension with condition

   Only items with value > 2 are included and values doubled.

2. Step 2: Apply condition to bins

   'plastic' (5) and 'paper' (3) qualify; 'glass' (2) does not.

3. Step 3: Calculate new values

   'plastic': 5*2=10, 'paper': 3*2=6

4. Final Answer:

   {'plastic': 10, 'paper': 6} -> Option A

5. Quick Check:

   Filter >2 and double values = {'plastic':10,'paper':6} [OK]

Hint: Filter values >2, then double [OK]

Common Mistakes:

• Including 'glass' which has value 2
• Not doubling the values
• Printing original dictionary

4. This code tries to calculate total recycled items but has an error:

items = {'plastic': 4, 'paper': 6, 'glass': 3}
total = 0
for item in items:
    total += items[item]
print(totall)

What is the error?

medium

A. Using += instead of =

B. Missing colon after for loop

C. Variable name typo in print statement

D. Incorrect dictionary syntax

Solution

1. Step 1: Check variable names used

   Variable 'total' is defined, but 'totall' is printed (typo).

2. Step 2: Identify impact of typo

   Printing 'totall' causes a NameError because it is undefined.

3. Final Answer:

   Variable name typo in print statement -> Option C

4. Quick Check:

   Print typo = NameError [OK]

Hint: Check variable names carefully [OK]

Common Mistakes:

• Ignoring typo and assuming logic error
• Thinking dictionary syntax is wrong
• Confusing += with =

5. A community wants to reduce waste by recycling and composting. They have 100 kg of waste: 40 kg plastic, 30 kg food scraps, 20 kg paper, and 10 kg glass. If they recycle all plastic, paper, and glass, and compost all food scraps, how much waste is diverted from landfill?

hard

A. 70 kg

B. 100 kg

C. 60 kg

D. 90 kg

Solution

1. Step 1: Identify recyclable and compostable waste

   Plastic (40 kg), paper (20 kg), glass (10 kg) are recycled; food scraps (30 kg) are composted.

2. Step 2: Calculate total diverted waste

   Sum recycled and composted: 40 + 20 + 10 + 30 = 100 kg.

3. Step 3: Confirm total waste and diversion

   Total waste is 100 kg; all waste is diverted from landfill.

4. Final Answer:

   100 kg -> Option B

5. Quick Check:

   All waste recycled or composted = 100 kg diverted [OK]

Hint: Add all recycled + composted weights [OK]

Common Mistakes:

• Forgetting to include composted food scraps
• Adding only recycled waste
• Misreading total waste amount