Did Toxic Gas Kill the Dinosaurs?
In Did Toxic Gas Kill the Dinosaurs?, naturalist Steve Backshall explains how invisible, toxic gas came to be a killer of dinosaurs millions of years ago. In addition to causing lava flows and forest fires, volcanic eruptions also produced fumes that were extremely deadly to dinosaurs. This video is excerpted from BBC’s Deadly Dinosaurs, a documentary series in which host Steve Backshall is on the hunt for the deadliest animals to have walked the Earth — dinosaurs — exploring features of several species and putting their abilities to the test to reveal the raw power of these creatures.
Lesson Express
Q: As described in the video, what dangerous conditions are caused by volcanoes?
A: Volcanoes can cause hot lava flow, black smoke, forest fires, hot rock bombs, clouds of ash, and gas that comes out of the vents of a volcano.
Q: What makes the gas that comes from volcanoes so dangerous?
A: It cannot be seen and it has no smell, taste, or color.
Q: What made the tinfoil boat appear to “float” near the top of the glass aquarium even though there is no water to hold it up?
A: There is an invisible gas that is very heavy, so it sinks to the bottom of the tank and stays there. The tinfoil boat is above the gas.
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