7th Grade Unit 2 Review 2016 Reilly Question Preview (ID: 34327)
7th Grade Unit 2 Review 2016.
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Matter cannot be created or destroyed is which law?
a) conservation of energy
b) conservation of mass
c) conservation of volume
d) conservation of light
all matter is made of
a) atoms
b) gas
c) energy
d) life
if something has a lot of mass
a) It has a low frequency
b) It has a high density
c) It has a large volume
d) It contains a lot of matter
How is weight different than mass?
a) Weight is measured with a scale; mass is measured with a triple beam balance
b) Weight can be converted to energy; mass cannot
c) Weight is measured in grams; mass is measured in newtons
d) Weight changes depending on gravity; mass stays the constant throughout the universe
the two or more substances that used in a chemical reaction before the reaction happens are called
a) product
b) reactants
c) pollutants
d) producers
in a chemical reaction the end result is called
a) product
b) producers
c) reactants
d) pollutants
which of the following proves that a chemical reaction has taken place
a) gas formation
b) change in size
c) weathering
d)
which of the following proves that a chemical reaction has taken place
a) change in state
b) temperature change
c) size change
d)
In a chemical reaction, the atoms that make up the original substances are regrouped into different _________
a) Molecules
b) Compounds
c) Elements
d) Atoms
heat energy is also considered
a) Electric energy
b) Thermal energy
c) Light
d) Potential energy
potential energy is
a) energy of movement
b) energy of light
c) stored energy
d) stored calories
kinetic energy is
a) energy of movement
b) energy of light
c) stored energy
d) stored calories
Everything in science wants to be ______
a) bigger
b) smaller
c) equal
d) neutral
A measure of the average kinetic energy of the particles in an object is called
a) Thermal energy
b) Kinetic energy
c) Plasma
d) temperature
What tool do we use to measure temperature?
a) graduated cylinder
b) beaker
c) erlenmeyer flask
d) thermometer
what type of equipment do you use to measure the volume of an irregularly shaped object?
a) graduated cylinder
b) beaker
c) erlenmeyer flask
d) thermometer
an endothermic reaction results in
a) temperature increase
b) temperature decrease
c) no change
d)
an exothermic reaction results in
a) temperature increase
b) temperature decrease
c) no change
d)
what is matter?
a) anything that takes up energy
b) anything that takes up space
c) anything that has mass
d) anything that has mass and takes up space
true or false....heat can be lost, destroyed or disappear?
a) true
b) false
c)
d)
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