Q: In what type of mining must tunnels be blasted into the rock so that miners and equipment can get to the ore? Choices: - open-pit mining - strip mining - gold mining - underground mining A:
underground mining

Q: What tides occur during the new moon and full moon? Choices: - autumn - high - bottom - spring A:
spring

Q: What is a common condition caused by stomach acid? Choices: - arthritis - headache - sunburn - heartburn A:
heartburn