Revelation 8:1 "And when he had opened the seventh seal, there was silence in heaven about the space of half an hour. 2 And I saw the seven angels which stood before God; and to them were given seven trumpets. 3 And another angel came and stood at the altar, having a golden censer; and there was given unto him much incense, that he should offer it with the prayers of all saints upon the golden altar which was before the throne. 4 And the smoke of the incense, which came with the prayers of the saints, ascended up before God out of the angel's hand. 5 And the angel took the censer, and filled it with fire of the altar, and cast it into the earth: and there were voices, and thunderings, and lightnings, and an earthquake. 6 And the seven angels which had the seven trumpets prepared themselves to sound. 7 The first angel sounded, and there followed hail and fire mingled with blood, and they were cast upon the earth: and the third part of trees was burnt up, and all green grass was burnt up. 8 And the second angel sounded, and as it were a great mountain burning with fire was cast into the sea: and the third part of the sea became blood; 9 And the third part of the creatures which were in the sea, and had life, died; and the third part of the ships were destroyed. 10 And the third angel sounded, and there fell a great star from heaven, burning as it were a lamp, and it fell upon the third part of the rivers, and upon the fountains of waters; 11 And the name of the star is called Wormwood: and the third part of the waters became wormwood; and many men died of the waters, because they were made bitter. 12 And the fourth angel sounded, and the third part of the sun was smitten, and the third part of the moon, and the third part of the stars; so as the third part of them was darkened, and the day shone not for a third part of it, and the night likewise. 13 And I beheld, and heard an angel flying through the midst of heaven, saying with a loud voice, Woe, woe, woe, to the inhabiters of the earth by reason of the other voices of the trumpet of the three angels, which are yet to sound!"
The whole chapter shows God destroying the world.
8:1 - This starts the second account of the Tribulation with the trumpets (Revelation 8-11). This verse proves that there are no women in heaven (Joke).
8:2-3 - These verses show that there is a temple in the third heaven (Revelation 7:15,17, 11:19). This temple is probably like the one God gave Moses directions to build on earth (Hebrews 8:5). When Eternity begins, New Jerusalem will not have a temple in it (Revelation 21:22). The golden altar is an altar of incense (Hebrews 9:4, Exodus 37:25-28). Cross references for verse 2 are Revelation 10:7 and 11:15. Cross references for verse 3 are Psalms 141:2 and Luke 1:9-10(type of prayers of the saints).
8:4-5 - The fire comes from either the golden (inside) or brazen altar (the altar outside). The souls martyred in the Tribulation in Revelation 6:9-10 will now get their prayers answered and get vengeance.
8:6-7 - In this plague, plants are destroyed with hail and fire with blood. The cross reference for verse 7 is Ezekiel 32:6.
8:8-9 - The sea mentioned is probably the Mediterranean sea and is mentioned again in Revelation 13:1. Cross reference for verse 8 are Jeremiah 51:25 and Revelation 16:3-6.
8:10-11 - The cross reference is found in Jeremiah 9:15 and 51:25. The waters become bitter and make people die from drinking it. The Tribulation saints will have the Apostolic signs and not die (Mark 16:17-18). Also, temple worship, sacrifice, water baptism for the Holy Spirit and observing the Sabbath come back in the Tribulation (Matthew 24:15,20, Joel 2, Acts 2:17-18).
8:12-13 - Cross references are Joel 2:10, Amos 8:9, Revelation 6:12.