Hoping to rebound from their Monday Night loss in Atlanta, the Broncos returned home for an AFC duel with the Houston Texans. The Broncos jumped out to a 5-0 lead in the first quarter, with defensive end Elvis Dumervil sacking Texans' quarterback Matt Schaub in the end zone for a safety, followed by a 32-yard field goal placekicker Matt Prater. However, the Texans would reel off 21 unanswered points, with Schaub throwing three touchdown passes&#8212;a 60-yarder to wide receiver Andre Johnson, followed in the second quarter by a 3-yarder to running back Arian Foster and a 52-yarder to wide receiver Kevin Walter. The Broncos narrowed the Texans' lead to 21-11 at halftime, with a pair of field goals by Prater&#8212;from 23 and 53 yards. The Texans increased their lead in the third quarter, with a 41-yard field goal by placekicker Shayne Graham, followed by a 14-yard touchdown pass from Schaub to tight end Owen Daniels. Trailing 31-11 with 10:20 remaining in the fourth quarter, the Broncos tried to rally, with quarterback Peyton Manning throwing a pair of touchdown passes&#8212;a 38-yarder to wide receiver Brandon Stokley and a 6-yarder to tight end Joel Dreessen to narrow Houston's lead to 31-25 with three minutes remaining. After forcing a Texans' punt, the Broncos got the football back with 20 seconds remaining, but the Texans' defense stood their ground. Former wide receiver Rod Smith, who played with the Broncos from 1994-2007, was inducted into the Broncos Ring of Fame during halftime. Smith is the Broncos' franchise leader in receptions, receiving yards and touchdowns.
Question: How many more field goals were made in the first half than the second?
Answer: 2