Answer:
false
Explanation:
b. meteoroid
c. dwarf planet
d. Kuiper Belt object
Ceres is best classified as a dwarf planet. Ceres is located in he asteroid belt. Ceres is much closer to Earth than Pluto and it was discovered in the year of 1801.
Answer:
All of the above
Explanation:
According to Newton's second law of motion,
If a certain force is applied on objects of different mass, the lighter object will travel farther and faster. All the options in the question have pairs where one object is lighter than other.
So, Jim can throw a tennis ball farther than a basketball. Jim can throw a can of soda farther than a liter bottle of soda and he can throw a chair farther than a couch.
According to geological data, oxygen production by photosynthetic microbes began about 2 billion years ago. This made it possible for oxygen to build up in the atmosphere, which eventually led to a switch from reducing to oxidizing circumstances.
A basic type of bacteria eventually evolved that could survive by using the energy from the Sun and the carbon dioxide in the water to produce oxygen as a byproduct. As a result, the atmosphere started to fill up with oxygen as carbon dioxide levels were falling.
Cyanobacteria underwent a stunning transformation at least 2.4 billion years ago, which was made possible by their evolution.
They evolved into the earliest photo-synthesizers on Earth, producing food out of water and solar energy, while also releasing oxygen in the process.
Therefore, living beings were able to breathe because of the oxygen in the early atmosphere.
Learn more about earth's atmosphere here:
#SPJ2
Answer: the correct options are
- were once connected
- are slowly drifting
Explanation: The continent is the main land mass of the earth which includes the following:
- Asia, Africa, Europe, Australia, North America, South America, and Antarctica.
These continents were once connected forming a supercontinent called PANGAEA
during the late palaeozoic and early mesozoic eras, millions of years ago.
Alfred Wegener, who is a German meteorologist, in 1912 came up with a hypothesis that the continents are slowly drifting the earth. He called the movement continental drift.
The continents rest on massive slabs of rock called tectonic plates. The plates are always moving and interacting in a process called plate tectonics. In recent studies, through the science of plate tectonics, we where able to understand the mechanism through which continental drift occurs. The mechanism includes:
- processes of seafloor spreading,
- rift valley formation, and
- subduction (where heavier tectonic plates sink beneath lighter ones).
Answer:
Were once connected, and Are slowly drifting
Explanation:
It's called the continental drift, At first, Wegener's theory was dismissed. No one believed that the continents moved. During the 1920s, another scientist named Arthur Holmes suggested that the magma in the earth's mantle moved through convection currents. As hot magma rose toward the crust, it cooled and then sank back down. The cycle continued over and over, causing motion that was powerful enough to move the continents. Like Wegener's theory, Holmes' idea was not accepted by the scientific community. Forty years later, geologists compared mineral and fossil samples from Africa to those in South America. The samples matched perfectly. Today, the theory of continental drift is supported by a large amount of data and evidence. The continents as a whole was once called Pangaea.