What were the first hominins? australopithecines What four characteristics define a hominin? Some characteristics that have distinguished hominins from other primates, living and extinct, are their erect posture, bipedal locomotion, larger brains, and behavioral characteristics such as specialized tool use and, in some cases, communication through language. What are 5 types of hominids? In this […]
What is the difference between a supersaturated solution and a saturated solution?
What is the difference between a supersaturated solution and a saturated solution? A saturated solution contains the maximum amount of solute that will dissolve at that temperature. Any further addition of solute will result in undissolved solid on the bottom of the container. A supersaturated solution contains more than the maximum amount of solute that […]
What is low need for affiliation?
What is low need for affiliation? A low need of affiliation can be part of a more independent personality. People who do not feel a strong desire to affiliate with others may be viewed as loners, and could have difficulty finding support. The need for affiliation might cause people to seek new groups when they […]
Why are producers the first organism in a food chain?
Why are producers the first organism in a food chain? Producers and consumers A food chain always starts with a producer , an organism that makes food. This is usually a green plant, because plants can make their own food by photosynthesis . The arrows in food chains show the way in which energy is […]
Is the LEED exam difficult?
Which safety precaution is recommended when a liquid is being heated in a test tube?
Which safety precaution is recommended when a liquid is being heated in a test tube? Which safety precaution is recommended when a liquid is being heated in a test tube? When holding the test tube, keep fingers closest to the open end of the tube. Direct the flame of the burner into the open end […]
Why do Springs stop oscillating?
Why do Springs stop oscillating? We know that in reality, a spring won’t oscillate for ever. Frictional forces will diminish the amplitude of oscillation until eventually the system is at rest. We will now add frictional forces to the mass and spring. This is describes an exponential decay of the amplitude. How often should coil […]
How does nuclear energy affect the environment?
How does nuclear energy affect the environment? Nuclear power plants use uranium as fuel. The process of mining uranium releases high amounts of carbon dioxide into the environment. Carbon dioxide is also released into the environment when new nuclear power plants are built. Finally, the transport of radioactive waste also causes carbon dioxide emissions. Which […]
Is neon shiny or dull?
Is neon shiny or dull? Element Luster Malleability Neon Colorless Not able to be stretched Silicon Dull, metallic Brittle, shatters when shaped Sulfur Dull Cannot be stretched Manganese Shiny Can be hammered into thin sheets Is helium bad for? The more pure helium you inhale, the longer your body is without crucial oxygen. Breathing in […]
How do you interpret weather Pressure?
How do you interpret weather Pressure? A barometric reading below 29.80 inHg is generally considered low, and low pressure is associated with warm air and rainstorms….Low Pressure Rising or steady pressure indicates clearing and cooler weather. Slowly falling pressure indicates rain. Rapidly falling pressure indicates a storm is coming. What causes high and low pressure […]