Courtney believes that the dinosaurs went extinct as a result of a giant asteroid hitting the earth. scientists discovered a 150 km wide crater dating back to the time of their extinction, according to the fossil record. the crater and the fossil record are examples of researched data that support courtney’s explanation.

 The explanation given by Courtney regarding the extinction of the dinosaurs is true.

Further Explanation:

The dinosaurs were considered to be present on the Earth about ago. It is believed that the extinction of the dinosaurs was due to the effect of a very huge asteroid that hit the Earth.

The effect of the asteroid led to the formation of the huge cloud of dust in the atmosphere. This blocked the sunlight from entering the Earth and due to this, the temperature of the Earth reduced significantly and then as the cloud cleared, the greenhouse gases caused the increase in the temperature.

This sudden change in the climatic conditions of Earth led to the extinction of the dinosaurs. The scientists discovered a wide crater on the Earth hat signifies the impact of a huge asteroid.

Therefore, the explanation given by Courtney regarding the extinction of the dinosaurs is true.

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Answer Details:

Grade: High School

Chapter: Science

Subject: Physics

Keywords:  Scientists, 150 km crater, huge asteroid, dinosaurs, impact of asteroid, gases, temperature, Yucatan peninsula.

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.

part 1: which substance has a higher solubility?

a

smallest amount left undissolved atall temps in table shown most has dissolved high sol'by