Chem review

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Key concepts from the uploaded notes.

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Kaitlyn Currry

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Chem review


Chem reviewOnline version Key concepts from the uploaded notes. by Kaitlyn Currry 1 What gas is primarily responsible for the greenhouse effect discussed in the notes? a CH4 b CO2 c O2 d N2 2 Which curve describes how forgetting occurs over time? a Logistic Curve b Learning Curve c Ebbinghaus Forgetting Curve d Exponential Growth Curve 3 In chili pepper heat explanations, which substance helps neutralize effects? a Sugar b Water c Salt d Milk casein protein 4 What rule explains dissolution in the chili pepper example? a Opposites attract b All solutes dissolve equally c Like dissolves like d Water dissolves everything 5 What valence-electron charge is shown for ionic bonds in the cheat sheet? a 0.7 b 2.0 c 1.7 d 1.0 6 Which study approach is recommended to avoid cramming? a Spaced repetition b Massed practice c Immediate memorization d Rushed cramming 7 Which gas-related topic is linked to the CO2 spectrum note? a CO2 vibration b Oxygen absorption c Methane stretching d Nitrogen fusion 8 Which phrase captures the core idea of 'Like dissolves like' from the notes? a Similar properties dissolve each other b Solubility is random c Opposites attract in solutions d Only temperature matters 9 What is the primary purpose of the greenhouse effect as described? a Cool the planet b Create rain c Absorb all sunlight d Trap heat in the atmosphere 10 What type of radiation does Earth absorb and then re-emit? a Infrared (IR) radiation b Microwave radiation c Ultraviolet (UV) radiation] d Visible light 11 What do greenhouse gases do with infrared (IR) radiation? a Cause it to vanish b Reflect it c Transmit without change d Absorb and re-radiate it, trapping heat 12 Name two main greenhouse gases and one major source for each. a CO2 — transportation; CH4 — rice paddies b CO2 — burning fuels; CH4 — livestock or landfills c CO2 — deforestation; CH4 — hydroelectric d CO2 — electricity; CH4 — plastic waste 13 Why is having some greenhouse effect actually good for Earth? a It keeps Earth warm enough for life b It cools the planet c It makes Earth hotter than the sun d It blocks all sunlight 14 What happens if the amount of greenhouse gases keeps increasing? a No change in climate b Heat escapes more easily, cooling Earth c More trapped heat → global warming d Earth becomes uninhabitable instantly 15 Name two major human activities that increase greenhouse gases. a Reforestation, recycling b Eating vegetables, walking more c Solar power, wind energy d Burning fossil fuels, deforestation 16 Give two ways humans can help reduce greenhouse gas emissions. a Increase plastic production b Single-use energy devices c Burn more fuel, expand mining d Renewable energy, reforestation 17 Why does replanting trees help the atmosphere? a Trees release CO2 when planted b Trees block sunlight permanently c Trees increase methane release d Trees absorb CO2 (carbon sinks) 18 What is one benefit of switching to renewable energy? a Increases fossil fuel dependence b Requires more greenhouse gases c Produces energy without releasing greenhouse gases d Is always more expensive forever 19 what type of radiation does earth absorb and then re-emit a infrared (IR) radiation b Green house gas c fossil fuel d Radiation 20 Why can CO2 trap heat in the atmosphere? a CO2 reflects heat back into space b CO2 blocks sunlight from reaching Earth c CO2 molecules vibrate in IR light, absorbing energy d CO2 cools the atmosphere directly 21 What does 'like dissolves like' mean? a Only acids dissolve bases b Ionic compounds dissolve non-polar solvents c Polar dissolves polar; non-polar dissolves non-polar d All substances dissolve in water 22 Why does milk cool your mouth after eating chili? a Milk makes chili evaporate b Milk reacts chemically to neutralize capsaicin c Milk dilutes chili with sugar d Milk's casein (non-polar) binds capsaicin (non-polar), washing it away 23 What kind of bond forms between a metal and a non-metal? a Hydrogen bond b Covalent bond c Ionic bond d Metallic bond 24 What kind of bond forms between two non-metals? a Metallic bond b Covalent bond c Hydrogen bond d Ionic bond 25 What do valence electrons tell you about an atom? a The atom's weight b How many protons the atom has c The number of electrons available for bonding d The nucleus charge 26 What is the approximate electronegativity difference that separates ionic and covalent bonds? a About 0.1 b About 0.5 c About 2.5 d About 1.7 27 What type of bond occurs when electrons are shared? a Covalent bond b Metallic bond c Ionic bond d Hydrogen bond 28 What type of bond occurs when electrons are transferred? a Ionic bond b Metallic bond c Covalent bond d Hydrogen bond

Chem review

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About this activity

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Chem reviewOnline version

by Kaitlyn Currry

What gas is primarily responsible for the greenhouse effect discussed in the notes?

Which curve describes how forgetting occurs over time?

In chili pepper heat explanations, which substance helps neutralize effects?

What rule explains dissolution in the chili pepper example?

What valence-electron charge is shown for ionic bonds in the cheat sheet?

Which study approach is recommended to avoid cramming?

Which gas-related topic is linked to the CO2 spectrum note?

Which phrase captures the core idea of 'Like dissolves like' from the notes?

What is the primary purpose of the greenhouse effect as described?

What type of radiation does Earth absorb and then re-emit?

What do greenhouse gases do with infrared (IR) radiation?

Name two main greenhouse gases and one major source for each.

Why is having some greenhouse effect actually good for Earth?

What happens if the amount of greenhouse gases keeps increasing?

Name two major human activities that increase greenhouse gases.

Give two ways humans can help reduce greenhouse gas emissions.

Why does replanting trees help the atmosphere?

What is one benefit of switching to renewable energy?

what type of radiation does earth absorb and then re-emit

Why can CO2 trap heat in the atmosphere?

What does 'like dissolves like' mean?

Why does milk cool your mouth after eating chili?

What kind of bond forms between a metal and a non-metal?

What kind of bond forms between two non-metals?

What do valence electrons tell you about an atom?

What is the approximate electronegativity difference that separates ionic and covalent bonds?

What type of bond occurs when electrons are shared?

What type of bond occurs when electrons are transferred?