If you have a mass of 50 kg on Earth, what is your weight in newtons? An object with more mass is pulled by gravity with greater force. Mass and weight are closely related. However, the weight of an object can change if the force of gravity changes. On Earth, the force of gravity is the same everywhere. So how does the force of gravity change? It doesnt if you stay on Earth. What if we travel to another planet or moon in our solar system? Look at the photo of astronaut Edwin E. Aldrin Jr. taken by fellow astronaut Neil Armstrong in the Figure. They were the first humans to walk on the moon. An astronaut weighs less on the moon than he would on Earth. This is because the moons gravity is weaker than Earths. The astronauts mass, on the other hand, did not change. He still contained the same amount of matter on the moon as he did on Earth. If the astronaut weighed 175 pounds on Earth, he would have weighed only 29 pounds on the moon. If his mass on Earth was 80 kg, what would his mass have been on the moon? [Figure 3]

Question: "Why is it that a man on the moon who weighs 175lbs would only weight 29 pounds on the moon?"

Answer: "The force of gravity is less"

Response: yes

The center of an atom is held together by powerful forces. This gives them a huge amount of stored energy. This type of energy is called nuclear energy. This energy can be released and used to do work. This happens in nuclear power plants where they split apart the nucleus of an atom. This splitting apart is called nuclear fission. Another type of nuclear energy happens in the Sun. Here the atoms nuclei are not split apart. Instead, the nuclei of the atoms are fused, or joined together. This process is called nuclear fusion. Some of the suns energy travels to Earth. This energy from nuclear fusion warms the planet and provides the energy for photosynthesis.

Question: "Nuclear fusion happens inside what space body?"

Answer: "Mars"

Response: no

First of America Bank Corp. said it completed its acquisition of Midwest Financial Group Inc. for about $250 million. First of America, which now has 45 banks and $12.5 billion in assets, announced an agreement to acquire the Peoria, Ill., bank holding company in January. Midwest Financial has $2.3 billion in assets and eight banks. The Midwest Financial subsidiary banks will continue to operate under their current names until early 1990, when each will adopt the First of America name. Kalamazoo, Mich.-based First of America said it will eliminate the 13 management positions of the former Midwest Financial parent company. First of America said some of the managers will take other jobs with First of America. But it said that severance payments to those executives not staying with the company will reduce First of America's operating results for 1989 by $3 million to $4 million, or 15 cents to 20 cents a share.

Question: "How many banks did First of America Bank Corp gain with its acquisition of Midwest Financial Group Inc."

Answer: "12"

Response: no

Sometimes a full Moon moves through Earths shadow. This is a lunar eclipse . During a total lunar eclipse, the Moon travels completely in Earths umbra. During a partial lunar eclipse, only a portion of the Moon enters Earths umbra. When the Moon passes through Earths penumbra, it is a penumbral eclipse. Since Earths shadow is large, a lunar eclipse lasts for hours. Anyone with a view of the Moon can see a lunar eclipse. So unlike a solar eclipse, it doesnt get dark on Earth. Instead it gets dark on the Moon. Partial lunar eclipses occur at least twice a year, but total lunar eclipses are less common. The Moon glows with a dull red coloring during a total lunar eclipse.

Question: "How often does total lunar eclipse occur and what color is the moon?"

Answer: "Dull red"

Response:
yes