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Questions and Answers
Which gas makes up the majority of Earth's atmosphere?
Which gas makes up the majority of Earth's atmosphere?
- Hydrogen
- Oxygen
- Carbon dioxide
- Nitrogen (correct)
What causes the blue color of the sky during the day?
What causes the blue color of the sky during the day?
- Presence of clouds
- Scattering of sunlight by the atmosphere (correct)
- Reflection of the ocean
- Absorption of sunlight by the atmosphere
What is the layer of the Earth's atmosphere where weather occurs?
What is the layer of the Earth's atmosphere where weather occurs?
- Thermosphere
- Troposphere (correct)
- Stratosphere
- Mesosphere
What is the primary ingredient in concrete?
What is the primary ingredient in concrete?
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What is the process called when concrete hardens and becomes durable?
What is the process called when concrete hardens and becomes durable?
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What is the purpose of adding aggregates to concrete?
What is the purpose of adding aggregates to concrete?
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What is the typical ratio of water to cement in concrete?
What is the typical ratio of water to cement in concrete?
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What is the purpose of curing concrete?
What is the purpose of curing concrete?
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What is the most common type of reinforcement used in concrete construction?
What is the most common type of reinforcement used in concrete construction?
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