We know because we have found fossils (化石) in rocks (岩石) all over 1. ___ world. In the picture, the science workers 2. ___ (dig) dinosaur fossils carefully out of the ground. Then they 3. ___ (take) them to a museum (博物馆). At the museum, scientists will study the...
Many climbers fell down and died. The mountain is very windy. Parts of it are covered with snow. Many climbers may get caught in snowstorms and become unable 14The mountain is rocky. Sometimes, during snowstorms, rocks might fall down along the slopes. Any climber,trying to go up the ...
What eight elements make up the Earth's crust? How many tectonic plates are on Earth? How much gold is in the Earth's crust? How are most of the carbonate minerals and rocks formed? How much water is in the Earth's crust? How much water is under the Earth's crust?
On the rover arm is a Moessbauer Spectrometer, which is placed directly on samples to find iron-bearing minerals, another tool to help determine how water has affected the soil and rock. To determine the composition of rocks, there is an Alpha Particle X-ray Spectrometer — the same kind ...
On a basic level, it shouldn’t feel right. / Firstly, the way your eyes perceive light is different at the end of the day versus the start of the day. / Human eyes adapted to daylight may have a harder time / perceiving the changes in light as the day fades into the night. / ...
As we all know, the Earth's surface(表面) has many plates(板块). These plates are always moving. When two plates move past each other, the rocks begin to push against each other.After a while, the rocks break because of all the pressure that's built up. When the rocks break,there ...
①Many people are somewhat puzzled at the negative side of the voting, although some arequite happy with it, and active in doing it.尽管有些人热衷于选举,并且积极参与,但是也有很多人对选举消极的一面有点儿困惑。 ②People have long___how the Egyptians moved such huge rocks. 人们长期对埃及...
What kind of planet are Earth and Mars? If the mass of Uranus is 8.681 10 25 kg and the radius of Uranus is 2.556 10 7 m, what is the acceleration due to gravity on Uranus? How old is the planet Mars? How many rocks are in the asteroid belt? How large is the p...
As I learn more and grow up gradually, I change in many aspects. My teachers say I study harder and my parents say I am more sensible than before. As for me, I want to learn more in school and be a good boy to make my parents happy. Now, I am more focused on lessons and fini...
When did life start on Earth and how do they know? Life on Earth is believed to have originated around 3.5 billion years ago, as evidenced by the discovery of microfossils and biomarkers in some of the oldest rocks on the planet. These rocks, found in places like Western Australia, provide...