How did the asteroid wipe out the dinosaurs?
Debris from the explosion was thrown into the atmosphere, severely altering the climate, and leading to the extinction of roughly 3/4 of species that existed at that time, including the dinosaurs. Many asteroids of this type are now known; their orbits pass through the inner solar system and cross Earth’s orbit.
What happened to the asteroid that killed the dinosaurs?
The asteroid impact led to the extinction of 75% of life, including all non-avian dinosaurs. Part of the crater is offshore and part of it is on land. The crater is buried beneath many layers of rock and sediment.
How could an asteroid cause a mass extinction?
A large asteroid or comet could collide with the Earth’s surface with the force of hundreds to thousands of times the force of all the nuclear bombs on the Earth. For example, the K/T boundary impact has been proposed to have caused extinction of all non-avian dinosaurs 66 million years ago.
What survived the asteroid that killed the dinosaurs?
Survivors. Alligators & Crocodiles: These sizeable reptiles survived–even though other large reptiles did not. Birds: Birds are the only dinosaurs to survive the mass extinction event 65 million years ago. Frogs & Salamanders: These seemingly delicate amphibians survived the extinction that wiped out larger animals.
What are the two types of charges?
Electric charges are of two general types: positive and negative.
Can like charges attract each other?
When it comes to electric charge, there is one overriding theme: opposites attract, and like charges repel. As far back as 1980, research has shown that like-charged particles can attract one another when placed in an electrolyte solution containing multivalent counterions.
How does a material become positively charged?
When insulating materials rub against each other, they may become electrically charged . Electrons , which are negatively charged, may be ‘rubbed off’ one material and on to the other. The material that gains electrons becomes negatively charged. The material that loses electrons is left with a positive charge.
Why do same charges repel?
The two charges repel each other. If a positive charge and a negative charge interact, their forces act in the same direction, from the positive to the negative charge. As a result opposite charges attract each other: The electric field and resulting forces produced by two electrical charges of opposite polarity.
What happens when you rub a rod with a cloth?
The material that gains electrons becomes negatively charged. The material that loses electrons becomes positively charged. The duster picks up electrons from the rod. This leaves the rod with a positive overall charge and the duster with a negative overall charge.
Why do insulators not lose their charge?
Insulators prevent the electrons from moving and the charge remains static . Conductors , on the other hand, cannot hold the charge, as the electrons can move through them.
What is a rod with no charge called?
An atom is electrically neutral – has no overall electrical charge .
Why are negative charges heavier?
All charged particles come in one of two types: positive and negative (or plus and minus). The minus particles are the electrons, and the plus particles are the much heavier protons which are buried deep in the nucleus. As the distance between the charges is increased, the force quickly becomes smaller.
Is Earth Positive or negative?
Description. Atmospheric electricity is always present, and during fine weather away from thunderstorms, the air above the surface of Earth is positively charged, while the Earth’s surface charge is negative.
What part of the cloud is the most negatively charged?
The larger and denser graupel is either suspended in the middle of the thunderstorm cloud or falls toward the lower part of the storm. The result is that the upper part of the thunderstorm cloud becomes positively charged while the middle to lower part of the thunderstorm cloud becomes negatively charged (Figure 3).
How do clouds get charged?
During the storm, the droplets and crystals bump together and move apart in the air. This rubbing makes static electrical charges in the clouds. The minus, or negative, charges are at the bottom. When the charge at the bottom gets strong enough, the cloud lets out energy.