6th Grade Nine Weeks 2 Review 2019 Question Preview (ID: 49149)


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What is an advantage of hydropower?
a) No air pollution
b) It can help rivers flow better
c) It can create flooding
d) It can be used in every water source in the world

What is an advantage of nuclear energy?
a) It creates air pollution
b) Creates LARGE amounts of energy from small amounts of fuel
c) Creates no wastes
d) Everyone LOVES nuclear energy!

What is a disadvantage to nuclear energy?
a) Air pollution
b) Can affect migratory birds
c) radioactive wastes
d) flooding

Which is the easiest way for your family to supplement your household energy with no pollution?
a) Adding solar panels to help with heating water
b) Start burning coal in your backyard to power your house
c) Build a wind farm in your back yard
d) split uranium atoms in your basement to create energy

Which is a chemical change?
a) glass breaking
b) ice melting
c) a shirt changing color because bleach was spilled on it
d) sugar dissolving into water

If an ice cube melts on a hot day-that is a-
a) chemical change
b) physical change
c) chemical reaction
d) really hot day

Which is a physical change?
a) wood burning
b) baking a cake
c) silver spoon tarnishing
d) dissolving sugar into water

Which is a sign of a chemical change?
a) A color change
b) Something changes from solid to liquid
c) Something absorbed water
d) something dissolves

Is this an element or compound? Na
a) Compound-Nitrogen and Arsenic
b) Neither
c) Both
d) Element-Sodium

Is this an element or compound? CO
a) element-cobalt
b) There is no way to know
c) Compound-Carbon and Oxygen
d) neither

Which is NOT a sign of a chemical change?
a) one substance dissolved into another substance
b) Bubbles formed when two substances mixed
c) The temperature changed when two substances mixed
d) The substance changed color

What is a disadvantage of hydropower?
a) Radioactive wastes
b) Creates air pollution
c) It does not work when it is nighttime
d) It can cause flooding

Which is a characteristic of a compound?
a) made of a mixture of more than one element
b) a pure substance
c) made of only one element
d) found on the periodic table

Which would be a characteristic of an element?
a) formed through a chemical reaction
b) made of more than one element
c) a pure substance found on the periodic table
d) represented by a chemical formula

If I mix a clear fluid with a white powder and it turned bright yellow-what happened?
a) Nothing-clear and white make yellow all the time
b) a chemical change produced a new substance
c) a physical change occured
d) The white powder really was yellow

Which are found on the periodic table?
a) elements
b) compounds
c) both
d) apples

Which are essential for life?
a) elements
b) compounds
c) both elements and compounds
d) chair

Which is most affected by weather?
a) Geothermal
b) Hydropower
c) Nuclear
d) Wind

A source that can be replaced in a relatively short time
a) nonrenewable
b) renewable
c) inexhaustible
d) coal

What is true about fossil fuels?
a) we will never run out of them
b) they are limited and produce pollution
c) They are a clean energy source
d) They are the best energy source because we can use it forever

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