Problem: Two cities had different energy source. Big city burned fossil fuels cut forests and cleared land, while Blue city used alternative sources of energy. Which city destroyed more autotrophic organisms?

A: Big

Problem: Rob is learning about ionization. He looks at a specific group of elements from top to bottom to figure out thier ionization energy. Which element will have a higher shielding effect, the top element or the bottom element?

A: bottom element

Problem: Mike and John are brothers. Their dad sent them to the doctor's office to get tested for hepatitis because Mike was feeling sick all the time. It turned out Mike has hepatitis B, while John doesn't. Which brother had a disease of the liver?

A: Mike

Problem: Johnathan is trying to find two blocks of wood with the same mass for a project he is working on. He doesn't have a balance, so he makes a crude one out of materials he has on hand. He put a block of wood on either side and the block on the left side was at a lower level than the block on the right. Sarah is using a traditional balance to estimate the mass of her peppers. She wants to make 1 kg bushels to sell at the farmers market so she puts a 1 kg weight on the right side and the peppers on the left side. If the 1 kg weight is higher than the peppers does Sarah need to add more peppers or remove peppers?

A:
remove peppers