Read the "things that matter'
...strong hydrogen bonds between the oxygen and hydrogen atoms of neighbouring atoms increases the amount of energy needed to cause water to change states.
Answer:
Explanation:
Not sure about the first question but
#2: hybrid
#3: alleles
Answer:
1. Before: carbon dioxide After: Oxygen
2. Oxygen
3. Chloroplast
First, he should measure how long it takes for the liquid to become clear if X and Y are mixed together. Then, he should measure how long it takes if he also adds substance A to X and Y. He will find out if substance A is a catalyst. hope this helps :)
