Fossils are evidence of life on Earth from long, long ago. Fossils can be bones or teeth or whole insects encased in amber. Foss
ils can be footprints or impressions of plant of animals parts. Fossils are often found buried in layers of soil and rock. When scientists find layers of rock containing fossils, they know that the oldest fossils are found in the bottom layer and as they work up toward the ground, the layers get younger. What story do these layers containing fossils tell you? Check all the sentences that are TRUE.
The first five layers show life that lived in the ocean.
There were plants on Earth before animals.
Layer 7 to layer 12 shows the fossils of life living on land.
Life on Earth changed over time.
Life on Earth was extinct in layer 6.
I will like to leave a constructive comment that can potentially lead you to the correct answer!
Most fossils are found in sedimentary rock. Sedimentary rock is formed by dirt (sand, silt, or clay) and debris that settles to the bottom of an ocean or lake and compresses for such a long time that it becomes hard as a rock.
6. contain abundant clouds of cool gas and dust --- Spiral galaxies.
7. have significant, ongoing star formation --- Spiral galaxies
Explanation:
Most galaxies that contain a central bulge that is surrounded by a rotating disk of arms that circles the galaxies are said to be a spiral galaxy.
About 60% of the galaxies are made up of spiral shapes and they are mostly found n low-density regions and are in the central of the galaxy clusters. Spiral galaxies often have beautifully shaped made form hot and young stars.
The more reddish in color indicates much older galaxies and are resemble that of an elliptical shape. Also, they consist of a little amount of dust and gas left. Spiral galaxy has rich gas and high star formations.
