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Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does LED stand for?
💡 Hint: Think about the type of light technology used in modern bulbs.
Question 2
Easy
Name one benefit of electric vehicles.
💡 Hint: Consider what power source EVs use.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What percentage less energy do LED bulbs use compared to incandescent bulbs?
- 50%
- 75%
- 85%
💡 Hint: Remember the comparison made between the two types of bulbs.
Question 2
True or False: Electric vehicles run completely on fossil fuels.
- True
- False
💡 Hint: Consider the primary power source of these vehicles.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A family switches from incandescent bulbs to LED bulbs in their home. If they had 10 bulbs, each consuming 60 watts, calculate the total energy saved per month (30 days) if they use the lights for 5 hours a day. Assume an LED uses 9 watts.
💡 Hint: First, find the monthly energy consumed for both types of bulbs.
Question 2
Discuss how implementing electric vehicles in a city can affect its overall energy consumption and pollution levels. What measures can be taken to promote their adoption?
💡 Hint: Consider both environmental and economic factors.
Challenge and get performance evaluation