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16 Cards in this Set
- Front
- Back
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What is an element? |
Substances which contain only one type of atom what |
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What is an atom? |
The smallest part of an element that can exist |
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What is a compound? |
A substance made up of atoms of two or more elements strongly joined together |
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What is a molecule? |
A group of two or more atoms strongly joined together |
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What is aerobic respiration? |
A chemical reaction which releases energy |
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What is anaerobic respiration? |
A chemical reaction which releases energy from glucose when there is little oxygen |
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Word equation for aerobic respiration |
Glucose+oxygen=carbon dioxide+water |
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Word equation for anaerobic respiration |
Glucose=lactic acid(+energy) |
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What are gametes? |
Sex cells |
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Name the seven nutrients |
Carbohydrates for energy, lipids for energy and insulation, proteins for growth and repair of tissues, vitamins and minerals to keep you healthy, water and fibre to keep food moving through the gut |
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What are enzymes? |
Biological catalysts which speed up digestion without being used up |
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What are chromosomes, what is DNA and what are genes? |
DNA is organised into long strands called chromosomes. Each chromosome is divided into sections called genes |
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Word equation for reacting a metal with acid |
Metal+acid=salt+hydrogen |
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How does a wave of a louder sound differ from a quieter sound? |
Louder wave, higher amplitude |
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How does the wave of a higher pitch differ from a lower pitch? |
Higher pitch, higher frequency |
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What is power? |
Energy transferred per second |
