Trace fossils represent fossilized behavior and usually do not include any of the original organic material. Identify the trace
fossils in the images by dragging the labels to the correct location.
a) footprints
b) feeding marks
c) burrows
d) coprolites
a) footprints
b) feeding marks
c) burrows
d) coprolites
1 answer:
Answer:
1. d) coprolites, 2. b) feeding marks, 3. a) footprints, 4. c) burrows
Explanation:
- Trace fossils are those that have a fossil record of the biological activity and not the preserved parts of the plants and are usually altered by the later chemical activity or mineralization.
- A coprolite is a fossilized feace and are opposed to the body fossils and is evident from the behaviour of the animals and formed in different shapes and compose of animal dung.
- The feeding marks are the longest and deepest tooth marks left by carnivorous dinosaurs.
- Burrows in a fossil is the remains of the holes and tunnels excavated into the ground or the seafloor.
- The footprints are the tracks that are left by the ancient animals upon the sedimentary rocks.
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Answer:
Explanation:
We have a right triangle with sides AB, BC=5cm and AC=13cm (the hypotenuse). Let's apply the Pithagorean Theorem to find AB:
(1)
(2)
(3)
(4)
Now that we know the value of each side of the triangle, we will use the trigonometric function sine to find the angles C and A (angle B is remembering we are talking about a right triangle):
For angle C:
(5)
(6)
(7)
For angle A:
(8)
(9)
(10)
Calculating the difference between both angles: