Control group: 50 dogs continuing their normal diet
Experiments group: 50 dogs chosen to eat the new food
Independent variable: dog food
Dependent variable: the dogs’ weight
They are good conductors of heat and electricity.
They are solid at room tempature
They have a high melting point
Answer:
Answer down below
Explanation:
Through the processes of erosion and deposition, rivers and streams can drastically alter the Earth's surface. ... The rushing water of rivers helps to carve new features into the surface of the Earth.
Answer is: the oxidation number of oxygen must decrease.
Oxidizing agent is element (substance) that gain electrons in chemical reaction.
For example, balanced chemical reaction: C + O₂ → CO₂.
Oxygen change oxidation number from 0 to oxidation number -2 (reduction) and carbon change from 0 to +4 (oxidation)
