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Grade 8- first term exam review
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why does a camels have bushy eyelashes
to prevent sand from entering the eyes
to test for carbon dioxide, calcium carbonate is used, T/F?
false
what physical feature in a polar bear prevents excessive loss of body heat?
thick coat, small ears etc
in isotopes, atoms have different proton numbers, t/f?
false
once a seed is formed, the petals and anthers and stigma, wither away, t/F?
true
the male gamete in a flower is the?
pollen
the flower part into which a pollen grows its pollen tube is?
style
The famous gold foil experiment was conducted by?
Ernest rutherford
how did democritus contribute in the history of atoms?
suggested the word' atoms'
What did John Dalton do?
came up with the atomic theory
petrol burns in the car is the reaction endothermic/exothermic?
exothermic
a sherbet candy in your mouth fizzes, is it endothermic/exothermic?
endothermic
a puddle evaporates after a rainy day, is this endothermic or exothermic?
endothermic
Elaborate on 2 properties of a neutron
in the nucleus, has a mass of 1, neutral charge
Name two adaptations of a mangrove tree.
aerial roots, seeds growing vertically, leaves excreting salt etc
Why is alcohol used to test for starch in leaves?
it dissolves chlorophyll
Hibernation is a structural adaptation, T/F?
False
In photosynthesis, carbon dioxide is a reactant, T/F?
True
wind pollinated flowers have brighter, more colorful sweet smelling petals, T/F?
false
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