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Grade 7 end of term Review quiz
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loudness depends on?
amplitude
pitch of sound depends on?
frequency
Which process occurs at a fixed temperature, boiling/evaporation?
boiling
proteins are made up of simpler susbtances called?
amino acids
sound cannot be heard in a?
vacuum
the diagram shows molecule of element/compound?
molecule of element
the diagram shows an element/compound?
compound
when hydrogen reacts with water, what is produced?
water
a lack of vitamin C in the diet causes?
scurvy
which nutrient in food prevents constipation?
dietary fibre
formula for speed is?
distance/time
the instrument to measure speed in vehicles is called?
speedometer
the contraction and relaxation of muscles in the esophagus is called?
peristalsis
which region in the digestive system produces enzymes for digesting all proteins, fats and carbohydrates?
small intestine
What is the area where air particles are clsoe together?
compression
name two sources of fat
any relevant answer
name two sources of protein
any correct source
which technique is suitable to obtain both, salt and water from a mixture?
distillation
which technique would you use to separate sand from water?
filtration
Mention one property of chlorine.
its a gas/non metal/any relevant answer
which element symbol is Na?
sodium
What is the symbol of potassium?
K
in which organ does protein digestion begin?
stomach
Name one accessory organ of digestion
liver/ pancreas/ gall bladder