Như bất kỳ học sinh cấp lớp nào có thể nói với bạn, Trái đất có bốn đại dương: Thái Bình Dương, Đại Tây Dương, Ấn Độ Dương và Bắc Cực. Về mặt lịch sử, hầu hết các quốc gia đều công nhận mô hình 4 đại dương này, có xu hướng tập trung vào Thái Bình Dương, Đại Tây Dương và Ấn Độ Dương là các đại dương chính.
The correct answer is - False.
When a species is classified as threatened, it means that that particular species is expected to become endangered, not extinct. The species that are threatened, are species that have experienced a significant drop in numbers in recent times, but still have enough individuals to be able to survive and keep the species going. But if the situation starts to become worse and the species continues to lose numbers, than the species will fall into the category of endangered species, which will mean that it is expected that the species will die out in the very near future.
Explanation:
When light shines on an object, it is reflected, absorbed, or transmitted through the object, depending on the object's material and the frequency (color) of the light. ... However, because light can travel through space, it cannot be a matter wave, like sound or water waves.
When parallel light rays hit a concave mirror they reflect inwards towards a focal point. Each individual ray is still reflecting at the same angle as it hits that small part of the surface. ... Light rays travel towards the mirror in a straight line and are reflected inwards to meet at a point called the focal point. Opaque objects block light from traveling through them. Most of the light is either reflected by the object or absorbed and converted to thermal energy.
Also, when light is reflected from a mirror, it bounces off at the same angle in the opposite direction from which it hit. ... If the surface is concave, or curved inward, a group of light rays from a distant source is reflected back toward a single location known as the focal point