Science Video Response - Day 9

What is groundwater?

• Water found in rivers

• Water found in lakes

• Water found under the ground

• Water found in oceans

What materials primarily make up aquifers?

• Clay and silt

• Gravel, rock, and sand

• Volcanic ash

• Solid granite

What is the main reason wells are drilled into aquifers?

• To create new lakes

• To provide water for homes, farms, and industries

• To study rock formations

• To generate electricity

How much water do underground aquifers hold compared to all surface reservoirs and lakes in the US?

• About the same amount

• Much less water

• Slightly less water

• Far more water

What is a challenge with how quickly aquifers naturally refill?

• They refill too quickly

• They don't refill at all

• They refill very slowly

• They only refill during winter

Which NASA mission is used to measure groundwater levels from space?

• Apollo Mission

• Voyager Mission

• GRACE Mission

• Hubble Mission

How do GRACE satellites detect changes in groundwater levels?

• By taking pictures of the ground

• By measuring the temperature of the water

• By detecting small changes in Earth's gravity

• By using sound waves

What is happening to the ground in the Central Valley of California because of groundwater depletion?

• It is rising

• It is becoming more fertile

• It is sinking

• It is becoming rocky

What is the process called when ponds or wells are used to put water back into aquifers?

• Water extraction

• Dam construction

• Groundwater recharge

• Water purification

How many additional gallons of water does Santa Clara Valley Water District plan to add to their aquifers using recycled water?

• 15 million

• 30 million

• 15 billion

• 30 billion