According to the graph, which element is most abundant in Earth’s crust? According to the graph, what percent of Earth’s crust is made up of titanium? % of calcium? %

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?

The term gas is limited to those substances that exist in the gaseous state at

Which of the following occurs along coasts during the day?