7th grade science questions answers
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Answers:Do ur homework.
Answers:go here : http://en.wikipedia.org/wiki/Cellular_respiration it's well explained
Answers:I'll try to explain this in simple Grade 7 terms. 1. Photosynthesis and Respiration are basically opposites of each other. Photosynthesis (Plants) Carbon Dioxide + Water + Energy(sun) -> Oxygen + Sugar - Basically, plants can produce their own food. - We eat plants that provide us with the sugar that our body needs. - They also release the oxygen that we breath in. Respiration (Animals) Sugar + Oxygen -> Carbon Dioxide + Water + Energy - Animals (like humans), breath in oxygen. - This oxygen reacts with the sugar (from the foods we eat) to release energy for your muscles. - You then exhale (breath out) carbon dioxide and water. Notice that when you breath into a window or mirror there is fog? That's the water. 2. Cells have a membrane. The membrane lets certain things into and out of it. Single celled organisms can wrap itself around a bacteria or large molecule. This is called phagocytosis. Think: You have a big ball of yellow play dough (the cell) and a marble (a bacteria). You can flatten the dough out a bit, place the marble on top. Fold the dough in half, making sure the dough is connected together again. The dough connecting together is like the membrane connecting together to "engulf" the bacteria.
Answers:liquid A because definition and a statement about it is Viscosity is a measure of the resistance of a fluid which is being deformed by either shear stress or extensional stress. In everyday terms (and for fluids only), viscosity is "thickness." Thus, water is "thin. so the stronger the bond the more viscosity.