The molecules in a solid object are packed together, meaning that they are closely together and can’t move freely
Coal is considered a non renewable source because the earth cannot replenish it.
Answer:
When the diaphragm contracts (it's a large flat muscle), it pulls the lungs down this causing expansion which eventually lead to inhalation of air. If it's injured, then that will be affected.
Answer:
It excites electrons
Explanation:
Energy from sunlight excites electrons in plant cells and drives the chemical reaction needed to produce food in plants.
- This reaction is called photosynthesis.
- During photosynthesis, green plants manufacture their food using sunlight in the presence of carbon dioxide and water.
- The product of the reaction is glucose and oxygen gas.
- The role of the sunlight is to excite electrons which facilitates the process.
