That is true. the nuclei change in nuclear rxns. Chemical rnxs use electrons..
A and D
Density is mass over volume, if mass decreases or volume increases density decreases
Answer:
C
Explanation:
Rust is a chemical change (reaction) all of the other options only change the state meaning that it is a physical reaction.
Answer:
Convection currents are the result of differential heating. Lighter (less dense), warm material rises while heavier (more dense) cool material sinks. It is this movement that creates circulation patterns known as convection currents in the atmosphere, in water, and in the mantle of Earth.
