Answer:
It uses less energy to make something from recycled materials than from new materials.
Explanation:
Recycling reduces the need for extracting (mining, quarrying, and logging), refining, and processing raw materials. All of these create substantial air and water pollution. As recycling saves ene2rgy it also reduces greenhouse gas emissions, which helps to tackle climate change.
A gas is given off when two substances are mixed.
<u>physical change: A copper rod is hammered into a thin sheet. </u>
A solid forms when two clear liquids are mixed.
A matchstick changes color when it burns.
explanation
a physicals change vs chemical
physical change is like cutting, changing shape etc, it the molecules that make it and the chemicals of it stay same
chemical change when it chemically changed such as cooking meat
Complex carbohydrates require enzymes such as Salivary amylase, Pancreatic amylase, and Maltose for digestion.
Answer:
1. Smog from the factories
2. The lighter colored moths
3. The darker colored moths
4. (see explanation)
Explanation:
The peppered moth originally had light wings with dark speckles, which blended in with the tree trunks they would land on. This kept them hidden from predators.
A genetic mutation was found in which some moths appeared with dark wings with light speckles. Predators could easily spot these moths, so there were much less of them.
During the industrial revolution, smog put into the air by new factories would cause the once light colored trees to be coated in black from the pollution.
Now, the light moths with dark speckles were more easily identified than their genetically mutated counterparts.
The dark moths with light speckles were now the ones that could camouflage with the tree trunks, and became the dominant variation as the light moths were being eaten more.