Why are sharks afraid of dolphins? They know how to protect themselves. When they see an aggressive shark, they immediately attack it with the whole pod. This is why sharks avoid pods with many dolphins. Dolphins have soft skin and a flexible skeletal structure which allows them to be efficient in a fight. What would […]
Which event occurred more than 10 billion years ago?
Which event occurred more than 10 billion years ago? The Milky Way achieved its present form about 10 billion years ago when it merged with a smaller, neighbouring galaxy, new observations and modelling show. Will wind go into or out of a low? When warm air rises, cooler air will often move in to replace […]
How much energy is lost at each trophic level?
How much energy is lost at each trophic level? The amount of energy at each trophic level decreases as it moves through an ecosystem. As little as 10 percent of the energy at any trophic level is transferred to the next level; the rest is lost largely through metabolic processes as heat. Why is 10% […]
How much does neutron star matter weigh?
Do waves move matter as they travel?
Do waves move matter as they travel? In a wave phenomenon, energy can move from one location to another, yet the particles of matter in the medium return to their fixed position. A wave transports its energy without transporting matter. Energy is transported through the medium, yet the water molecules are not transported. Does light […]
Is the first step in a scientific investigation?
Is the first step in a scientific investigation? The first step in the Scientific Method is to make objective observations. These observations are based on specific events that have already happened and can be verified by others as true or false. Step 2. Form a hypothesis. Why is it important to have a hypothesis? Often […]
Is Inertia is the tendency of an object to stay at rest or in motion?
What is meant by a magnetic field?
What is meant by a magnetic field? A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A permanent magnet′s magnetic field pulls on ferromagnetic materials such as iron, and attracts or repels other magnets. What is another name for magnetic field? magnetic flux; […]
When hydrogen is a part of a it has a slight positive charge?
When hydrogen is a part of a it has a slight positive charge? Hydrogen Bonds Opposite charges attract one another. The slight positive charges on the hydrogen atoms in a water molecule attract the slight negative charges on the oxygen atoms of other water molecules. This tiny force of attraction is called a hydrogen bond. […]
How can metals be classified?
How can metals be classified? The elements can be classified as metals, nonmetals, or metalloids. Metals are good conductors of heat and electricity, and are malleable (they can be hammered into sheets) and ductile (they can be drawn into wire). When elements combine to form compounds, there are two major types of bonding that can […]