Atomic Structure
Bioenergetics
The Atmosphere
Energy
Energy Changes
100
TRUE or FALSE: Group 7 is called the Noble Gases.
FALSE: they are called the Halogens.
100
TRUE or FALSE: Iodine is a test for starches in leaves.
TRUE
100
TRUE or FALSE: Earth's early atmosphere contained oxygen.
FALSE: it was mostly water vapour, carbon dioxide and nitrogen, with some methane and ammonia.
100
TRUE or FALSE: batteries have lots of energy in their chemical store.
TRUE
100
TRUE or FALSE: Energy is released to the surroundings in endothermic reactions.
FALSE: Energy is absorbed from the surroundings in endothermic reactions
200
How can a soluble solid be separated from a liquid?
Evaporation OR Crystallisation OR Distillation
200
What is the name of the pigment required for photosynthesis?
Bonus: where is it found in a plant cell?
Chlorophyll
Bonus: Chloroplasts
200
Name 3 effects of climate change.
Sea levels rising, glaciers melting, ice caps melting, hurricanes, extreme weather, droughts, extinction of animals
200
Name 3 energy stores.
Kinetic, thermal, gravitational potential, elastic potential, chemical, magnetic, electrostatic
200
Name 2 exothermic processes.
Combustion/burning, neutralisation, condensation, freezing
300
Give the arrangement of electrons around an atom of aluminium.
2,8,3
300
Give the word equation for aerobic respiration.
Bonus: give the chemical formula for each substance
glucose + oxygen → carbon dioxide + water
C6H12O6 O2 CO2 H2O
300
Name 3 common air pollutants.
Sulfur dioxide, nitrogen oxides, ozone, carbon monoxide, carbon particulates, carbon dioxide, CFCs, methane
300
Name two energy transfers.
Heating by particles (sound), mechanical, heating by radiation (light), electrical
300
Does the profile show an exo- or endothermic reaction?
Bonus: Is the energy change is this reaction positive or negative?
Endothermic
Bonus: Positive
400
How many protons, electrons and neutrons are in potassium?
19 protons, 19 electrons, 20 neutrons
400
Explain how temperature acts as a limiting factor in photosynthesis.
As temperature increases, the rate of photosynthesis increases as particles have more energy so can react faster.
Above 40°C, the enzymes in the cells denature and photosynthesis stops.
400
Define the term carbon footprint.
The amount of carbon dioxide released over the full life cycle of an object or lifestyle.
400
Give the equation that finds the energy in the kinetic store.
EK = 1/2 mv2
400
Name 2 endothermic processes.
Thermal decomposition, electrolysis, melting, evaporation
500
Describe the Bohr model of the atom. (2 points required)
Positively charged nucleus
Electrons orbit in shells
NOT PERMITTED: Protons or neutrons in the nucleus
500
What are the possible products of anaerobic respiration.
In animal cells: lactic acid
In yeast + plant cells: carbon dioxide + ethanol
500
Explain how the greenhouse effect leads to an increase in global temperatures.
Use these keywords: long wavelength, short wavelength, absorb, re-emit.
Short wavelength radiation (light) enters the atmosphere and is absorbed by the Earth.
The radiation is re-emitted at a range of wavelengths.
The long wavelengths (infrared radiation) are absorbed and re-emitted by the atmosphere, reducing the amount that escapes.
500
What does each letter stand for in this formula:
E = 1/2 ke2
Bonus: make e the subject.
E - elastic potential energy
k - spring constant
e - extension
Bonus: e = sqrt(2E/k)
500
Define the term bond energy.
The energy required to break a specific type of bond OR the energy released when a specific type of bond is formed.