Do algae release oxygen? Like most plants, many algae produce oxygen during the daylight as a by-product of photosynthesis. At night these algae consume oxygen, but usually much less than was produced during the daylight. How can algae decrease oxygen levels? The overgrowth of algae consumes oxygen and blocks sunlight from underwater plants. When the […]
Is rate of reaction slower or faster?
Is rate of reaction slower or faster? The rate of a reaction is the speed at which a chemical reaction happens. If a reaction has a low rate, that means the molecules combine at a slower speed than a reaction with a high rate. Some reactions take hundreds, maybe even thousands, of years while others […]
What happens on a molecular level?
What happens on a molecular level? On the molecular level, the individual chemical bonds in the substance are not altered; hence, a phase change is not a chemical reaction. Instead, the molecules experience a decrease in potential energy in an endothermic phase change. What happens on a molecular level when water freezes? Point out that […]
What makes a well-designed experiment?
What makes a well-designed experiment? A well-designed experiment needs to have an independent variable and a dependent variable. The independent variable is what the scientist manipulates in the experiment. The dependent variable changes based on how the independent variable is manipulated. What are 3 key aspects of a well designed experiment? Three control strategies are […]
What is the relationship of current to resistance if voltage is constant?
What is the relationship of current to resistance if voltage is constant? The relationship between current, voltage and resistance is expressed by Ohm’s Law. This states that the current flowing in a circuit is directly proportional to the applied voltage and inversely proportional to the resistance of the circuit, provided the temperature remains constant. Why […]
What is average speed equal to?
How do you tell if it is a chemical or physical property?
How do you tell if it is a chemical or physical property? Intensive properties, such as density and color, do not depend on the amount of the substance present. Physical properties can be measured without changing a substance’s chemical identity. Chemical properties can be measured only by changing a substance’s chemical identity. Is reaction with […]
What happens when many water molecules come into contact with one another?
What happens when many water molecules come into contact with one another? What happens when 2 water molecules come in contact with each other, does the orientation of the water molecules matter? When they come into contact with each other they are attracted to each other and the orientation matters because the Hydrogen of one […]
How many impact craters are there on Earth?
How many impact craters are there on Earth? 175 Whats all happened in 2020? Australian wildfires. Impeachment of President Donald Trump. Tensions with Iran. Death of Kobe Bryant. Iowa Caucus chaos. Harvey Weinstein convicted. COVID-19 pandemic. Death of George Floyd. What good has happened in 2020? 50 positive things that happened in 2020 (so far) […]
What is the medical term for the surgical removal of an entire eyeball?
What is the medical term for the surgical removal of an entire eyeball? There are two main types of eye removal surgery: Enucleation. The entire eye (globe) is removed in an enucleation. The muscles that control eye movement are left intact and are resewn to the spherical implant (artificial eyeball). Is eye removal painful? Most […]