How do you classify a metal? 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). Is Silicon harmful to humans? Silicon crystalline irritates the skin and eyes on contact. […]
Which state reaches farthest north?
Which state reaches farthest north? Alaska What is the most north town in the world? Longyearbyen What country is closest to the North Pole? Nunavut What is the most northern habitable area on Earth? Alert, in the Qikiqtaaluk Region, Nunavut, Canada, is the northernmost permanently inhabited place in the world, located on Ellesmere Island (Queen […]
Who predicted properties of undiscovered elements?
Who predicted properties of undiscovered elements? Mendeleev What are elements that have some properties of metals and some properties of nonmetals called? Metalloids may act either like metals or nonmetals in chemical reactions. Most metalloids have some physical properties of metals and some physical properties of nonmetals. They fall between metals and nonmetals in their […]
What are good writing strategies?
What are good writing strategies? Listen and respond to guidance offered while producing your work. Keep focused on your question or task – keep asking yourself whether any material you plan to include is really relevant. Be clear, concise and to the point in what you write. Present your ideas in a clear and logical […]
Where does most of the heat in the atmosphere come from?
Where does most of the heat in the atmosphere come from? the sun What causes the atmosphere to heat up? Due to the chemical composition of the earth’s atmosphere, most of the infrared radiation emitted by the warm surface never reaches space. Instead the radiation is reflected or absorbed by compounds known as greenhouse gasses. […]
What are the three lines of defense in the immune system?
What are the three lines of defense in the immune system? The human body has three primary lines of defense to fight against foreign invaders, including viruses, bacteria, and fungi. The immune system’s three lines of defense include physical and chemical barriers, non-specific innate responses, and specific adaptive responses. What are the 8 body defenses? […]
What are 3 ways natural selection can change a distribution of traits?
What are 3 ways natural selection can change a distribution of traits? Natural selection on single-gene traits can lead to changes in allele frequencies and, thus, to changes in phenotype frequencies. Natural selection on polygenic traits can affect the distributions of phenotypes in three ways: directional selection, stabilizing selection, or disruptive selection. What is the […]
How do you separate mixtures from beads?
Why does my hair stand up when I rub a balloon on it?
Why does my hair stand up when I rub a balloon on it? This is because the rubbing creates a negative charge that is carried by electrons. The electrons can build up to produce static electricity. Consequently, when you pull the balloon slowly away from your head, you can see these two opposite static charges […]
Is there another way of writing very big or small numbers?
Is there another way of writing very big or small numbers? Scientific notation is a way of writing very large or very small numbers. A number is written in scientific notation when a number between 1 and 10 is multiplied by a power of 10. For example, 650,000,000 can be written in scientific notation as […]