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 Grade 9 :: Evolution by PMISIAS
 There is a population of beetles found in a specific deciduous forest. A few of these beetles end up in a different deciduous forest and are able to reproduce. This causes the frequencies of alleles to change. A situation like this, when allele frequencies change due to the migration of a small sub group of a population is known as The butterfly effect The founder effect The ripple effect The weinberg effect
 Grade 9 :: Magnetism and Electricity by jlovering
 Kaitlyn builds a project in which light bulb A and light bulb B are in parallel circuits. The project has a switch and uses a battery for its source of voltage. She connects her battery and neither light turns on. Which of the following could possibly be the problem with her project? Light bulb A is broken. Light bulb B is broken The switch is not closed Any of these would cause the problem described
 Grade 9 :: Molecules and Compounds by LBeth
 $NH_4^+$ cyanide hydroxide hydronium ammonium
 Grade 9 :: Molecules and Compounds by LBeth
 $O_2^(2-$ oxalate peroxide hydroxide hydronium
 Grade 9 :: Geomorphology by outom964
 The breaking down of rocks on the earth's surface s                      . weathering chemical weathering erosion mechanical weathering
 Grade 9 :: Geomorphology by outom964
 Water freezing in the cracks of rocks is an example of                      . deposition mechanical weathering chemical weathering erosion
 Grade 9 :: Earths Layers by appier
 The middle layer of the Earth is the                . mantle crust core
 Grade 9 :: Simple Machines by jlovering
 When using a broom to sweep a floor, your mechanical advantage will be less than 1 and your fulcrum will be your hand at the top of the broom. This means the broom acts as a: Class 1 Lever Class 2 Lever Class 3 Lever Class 4 Lever
 Grade 9 :: Molecules and Compounds by LBeth
 $HCO_3^-$ chlorite chlorate hydrogen sulfate hydrogen carbonate
 Grade 9 :: Molecules and Compounds by LBeth
 $C_2O_4^(2-$ oxalate peroxide hydroxide carbonate
 Grade 9 :: Molecules and Compounds by LBeth
 $PO_4^(3-$ acetate phosphate perchlorate phosphonium
 Grade 9 :: Simple Machines by jlovering
 Austin needs to lift a 300 N object using only 100 N of force. To accomplish this, he will need a simple machine with a mechanical advantage of what? 3 0.3 90% None of the Above
 Grade 9 :: Energy and Work by der1228
 Which form of energy does a plant store when light is transformed during photosynthesis? chemical energy thermal energy mechanical energy electrical energy
 Grade 9 :: Evolution by PMISIAS
 How can temporal isolation lead to speciation? If two populations do not like each other, this may lead to the formation of a separate species If two populations reproduce in different ways, this may lead them to become separate species If two populations are separated by a geographic barrier, this will cause them to reproduce with other members of their own species which may them to become separate species If two populations reproduce at different times, they are unlikely to reproduce with each other which may cause them to become separate species
 Grade 9 :: Rocks by seanrwerner
 Intrusive igneous rocks are formed from cooled magma below the surface. True False
 Grade 9 :: Sound and Light by erinann02
 The pitch of a sound depends on its amplitude elasticity density resonance frequency
 Grade 9 :: Genetics by PMISIAS
 Two main sources of genetic variation are immigration and allele frequencies genetic shuffling and immigration mutations and immigration mutations and genetic shuffling
 Grade 9 :: Skin Skeleton and Muscles by Junelaw
 Which of the following contacts the distal end of the humerus? Proximal Tibia Proximal Fibula Distal Scapula Proximal Radius
 Grade 9 :: Oceanography and Hydrology by LBeth
 Water from precipitation that does not enter the ground, but drains to surface water bodies runoff watershed groundwater floodplain
 Grade 9 :: Oceanography and Hydrology by LBeth
 Water stored within the earth below the water table runoff watershed groundwater floodplain
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