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Worksheetsmid term exam _ science
Total questions: 20
Worksheet time: 15mins
what is the charge of a neutron?
negative
neutral
positive
all of the above
what is the boiling point on earth? what temperature does it occur?
112 degrees celsius
100 degrees celsius
90 degrees celsius
140 degrees celsius
what is true about an atom?
not always moving
has a nucleus
smallest part of an element, has all the properties of an element
unbreakable
I leave my ice cream in the sun and it melts.. what kind of change is this?
melting point
physical change
chemical change
evaporation
if the rate of reaction is faster, what temperature is the reaction?
cold
warm
nuetral
boiling point
what is atomic structure?
determines the temperature of a substance
determines the rate of reaction
determines the properties of a substance
evolves the growth of trees
what is a producer?
eats other organisms for food
breathes in air for energy
creates their own energy
decomposes dead organisms
when an apple is eaten, what is broken down and released into the cells for energy?
nutrients
glucose
decomposed human brain cells
water
which of the following is a primary consumer?
in every energy pyramid, which level has the least energy available to them?
primary consumers
tertiary consumers
producers
secondary consumers
what is the source of energy for autotrophs?
producers
decomposers
dead organisms
other organisms
through which part of the plant do the gasses enter?
roots
leaves
stomata
bark
through what process do most living things on Earth get the energy that they need to survive?
cellular respiration
air giving
photosynthesis
glucose
what is this relationship?
mutualism
commensalism
parasitism
predator and prey
what happens to an ecosystem when a population becomes overpopulated?
Organisms that rely on the same resources as the overpopulated organism will (increase).
Organisms that rely on the same resources as the overpopulated organism will (decrease).
what best describes the niche of this creature?
scavenger
producer
predator
prey
which of the following would be a limiting factor in the ecosystem below?
sand
water
birds
cactus
what does biotic mean?
alive organisms
dead organisms
producers
decomposers
How would an organism that has very few predators affect an ecosystem if it were to die out?
The producers would die out.
The ecosystem would reach equilibrium.
The herbivores would overpopulate.
The whole ecosystem would die out.
if cows depends mostly on grass for energy and a wild fire burned all of the grass supply, what would happen to the cow population?
decrease
increase
